No fuel from tbi injectors. Thank you for your feedback.

No fuel from tbi injectors. just wont crank up again once shut off because lack of fuel for start:confused: 5. Hello this is my first post on here this is my 1988 chevy heavy half cheyenne has a 350 and a 700r4 when i got this truck it was known to have tbi issues and I've changed everything that I can think of and that the internet has said to make the injectors fire and they will not pulse the truck has great spark and is getting power to the injectors a full 12 volts and they will not 94 GMC K2500 - No spray from fuel injectors (TBI) I have a 94 GMC K2500 that will not start. Buy ACDelco Professional 217-2286 Throttle Body Fuel Injector Assembly: Fuel Injectors - Amazon. Here is the problem, I have replaced the fuel filter, fuel pump and fuel pump relay. I've also heard a bad coil causing that as well but no experience with that . 3L cranking but no fuel or spark? TBI 1989 Title basically says it all, I turn the key, it cranks over but Im getting no fuel out of the TBI injectors, and no spark either. Check for rpm's Unplug the electrical connectors to the injectors. com Car Chat > Chevrolet > S-10 > 1994 4. I have a 1987 Chevy S-10 with the 2. With the hood up and air cleaner off I can see the injectors and there is no fuel coming from the injectors. 4. Since tank was half way out and the new pump was   If I pour fuel or spray ether down the throttle body, the engine will run fine, so the igniton and ASD relay are working. HOME PAGE: Fuel Injection Catalog: CONTACT US: 3857398 Volvo Penta 5. Cadillac. My 1990 K1500 350 TBI recently had a NO START condition with NO spark and NO fuel spray at TBI. Jeep fires if I use carb cleaner fluid, just not getting injector pulse Hey guys, I've been battling a no start issue on my 95 k1500 5. HOME PAGE: Fuel Injection Catalog: CONTACT US: Our Location: Bosch MPI Injectors: fuel injector flow rates: Rochester Products TBI Fuel Injectors > Rochester 17084327 68lb | Cop Car HO 350 includes Gaskets & O'rings. It is definetely a fuel delivery problem. What are my other likely suspects? 1992 c1500 5. AUTO TECH FOR THIRTY-FIVE YRS,ELCTRICAL,FUEL INJECTION ETC. Also replaced the I have the 258 with the Ca. Maybe try this before you spend the money for new injectors. 02-16-2011, 11:44 PM. SUPER easy to rebuild the TBI and install the injectors. Thank you for your feedback. Will not start. Note: Backup washers and o-rings must be installed before injectors, or improper seating of large o-rings could cause fuel to leak. Like I said in the title, it cranks but no spark and no fuel spray from the injectors. Cars & Trucks; All Recent; Join no power tp the fuel pump, injectors not pulsing, no fuel. legal Howell TBI. I've replaced the coil, and swapped the ignition module for one I had laying around. youcancallmedusty; Dec 13, 2023; Tech Discussion; 2. I have a good spark (after finding a week coil and replacing). then i pulled the bed and fed power to it and it runs. Jump to Latest Will run with fuel dumped in tbi so it has spark No power or ground at the injectors. I can pour a little fuel in the top of the throttle body No fuel through tbi on a 92 chevy suburban 5. The car still won't start. Please don’t use these. I replaced the distributor with a new rebuilt AC Delco from rock auto today. Have no fuel from the injectors. Bought the truck not running. M92PV4U Falling Down Strange that it only happens with new injectors. Prevously the injectors were working, a nice cone of fuel. Worth every penny. Fuel pressure measures at zero just before the TBI injection assembly on the intake manifold. KEEP TBI SIMPLE is my rule. Maybe the old injectors are dirty and even though the computer is trying to make adjustment for a lazy O2, it can't bc the injectors are so dirty and won't allow the fuel to pass. 5V at KOEO and smoothly goes up to 4. 3 TBI. If I use ether the engine runs. Short of pulling the TBI off and rebuilding, what can I do to fix it? 87 chevy tbi no fuel. So I tried to crank it up again after a couple of months (life got in the way) the truck would not run. Fuel pump is pumping but injectors are not spraying. Push down on injector until it is fully seated in the fuel meter body. The no fuel and no spark leads me to believe ICM OR/AND ECM. This link shows how to calibrate the throttle body which includes the TPS. If you click them and make a purchase, we may earn a small commission. I have a. 3, The CSFI system does plug up which causes rough idle due to the poppet valve or seat,to stick open or closed,Ive ran fuel injector 25170301 fuel injector for mercruiser throttle body 17096259. I replaced the distributor with a new rebuilt AC Delco from rock auto Unplug the electrical connectors to the injectors. Have plenty of spark. Part of the cranking diagnosis, it has to be determine whether the fuel Check your TPS to see if it's ~0. 7L will not start. Removed engine, all components and reinstalled on new reman block. Started up fine, ran a few minutes and died. Y. Bottom line: your ‘95 7. 1987 454 TBI down on power, runs good otherwise. 4 454 TBI fuel injected engine. P\\O started to remove tank for new fuel pump but didn't get far. 4 TBI isn’t getting enough fuel. Here are the non-start diagnostic Have you considered that the injectors may be working, but there is no fuel getting to them? Have you checked fuel pressure at the TBI? It only needs about 12 lbs. the motor was ceased so I swapped another 4. Checked injectors pulsing OK. Some older cars use a TBI – a ‘throttle body injection’ mechanism that injects fuel directly into the throttle body. I looked for anything obvious initially but couldn't find anything until i checked the fuse There is ZERO fuel from the injectors when cranking and the tips are bone dry. Still no fuel, can hear pump running, so started diagnosing. Check out your oil sending unit, fuel pump and relay, check for power (might be a fuse), the ignition control module I have a 1986 Chevy s10 2. I cannot get it to pump fuel when the key is. Then, with key ON, throttle at idle position, the injectors would spray like the throttle was at wide open. They can (and do) fail in a way that you can Hello all, Recently bought a 91 crewcab square with a 454 TBI with a 4l80e behind it, after vehicle has been shut off, after more then 30 seconds it won't restart, found injectors to Injectors are not pulsing, thus engine is not getting fuel. four weeks ago it started stalling while using in the yard. 3 TBI (throttle body injector) You dont have a TBI you should be equipt with a CSFI people in the field call this the spider injector,they inject fuel into tubes for each cylinder , as for the fuel pressure it should be 54 psi to 60 psi,and this is for a 4. This is the TBI system, not the MPI, with two I verified that the fuel Pump (from Howell EFI) was in fact working and supplied enough pressure to the injectors. It will crank but not start. More Hide. Highly recommend this product. # 0F562552 This boat ran great all last season and was put to bed in October with zero problems. Check out your oil sending unit, fuel pump and relay, check for power (might be a fuse), the ignition control module The car is cranking but no fuel coming out of the injectors. I do have 12v to the ignition coil. I have replaced the ignition module, oil pressure switch, fuel pump, FPR, knock sensor and ECM, and injectors. No sputter and cough, just dead. 20 Replies. 8 v6 tbi that does not emit fuel from the injectors and there is no troble code. I installed system myself.  If I unplug the electrical connection to the injectors and connection ground and 12 volts to the right pins to the injectors while jumpering the fuel pump on, I get gas through the injectors. ASE . Spend that money on the new distributor and good plug wires. youcancallmedusty. The fuses 20 Amp in battery box looks good and the two fuses underneath look good.  But the thing will not I'm rebuilding a 350 merc with TBI fuel injected. Took TBI unit out and disassembled, cleaned (I did find a chunk of dirt in the passage between the diaphragm and the injectors, which I thought may have been the issue), cleaned and inspected injectors and connections I'm having problems now with my 1992 2. No fuel can be seen spraying from the injectors (Throttle Body Injection). exp. De-winterized it today and no start. 9L; V6; 4WD; MANUAL; 165 MILES; No fuel from injectors, have spark to plugs, Truck has old fuel in the tank from sitting for 10 years so I rigged a container with new fuel pump and fresh gas straight to throttle body, and direct off battery. I have yet to see an MSD 6a or 6al box have any positive affect on TBI or any other fuel injection for that matter and I have seen it cause more than few issues. 29 yrs. Install injector, aligning raised lug on each injector base with notch in fuel meter body cavity. Thread starter Jims86; Start date Aug 5, 2011; Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. New throttle position sensor, IAC, fuel pressure regulator. I crank it and crank it and it seems like it's getting no fuel. Joined Aug 3, 2010 The truck will run on starter fluid or if I hotwire an injector open. Exc. There is 10+ psig of fuel pressure downstream of the fuel filter and you can hear the pump On a TBI, most common reason for no fuel spray from the injectors - although there is proper fuel pressure - is a bad ignition module. I have a 1990 chevy I can look at for reference and i can pretty much unplug everything and still have pulse using a noid light There are also TBI fuel injection conversion kits available for many older, carburetor-equipped cars. Police. If the PCM sees >1+V when trying to start, it'll think you're flooded and will shut off fuel. M. The pump is dying. 3l TBI S-10 no fuel delivery at injectors. 7L GSI TBI Fuel Injector Set. So I have fuel and spark. Hooked timing light up to #1 wire see if there is spark and yes there is. What is Throttle Body Injection? TBI is a type of fuel injection system that has one or two fuel injectors mounted in a throttle body. 8L, TBI fuel injection. both injectors spray fine. From there, the air-fuel mixture enters MSD boxes like a 6al. 91 replacement motor rebuilt and new cam. I have a no start condition on the port 7. The injectors should not spray fuel. Wondering if anyone has a clue on this. Used all original electronics and tbi. Through hours of fiddling, I have found that when I turn the key to the on position I can hear the fuel pump engage, but no fuel comes out of the injectors. On the short list of possibilities is: Ground wires to injectors are shorted to ground. Not for sure what the inputs and output terminals are, not for sure if its a bad ECM or the EGR Upgraded Vortec cylinder heads, a more aggressive camshaft, and reprogramming TBI chip to make 300 horsepower or more with a GM Chevy 305, 350, and 454 engine with factory TBI injection. its a 94 4. Browse Categories Answer Questions . If the computer My 1990 K1500 350 TBI recently had a NO START condition with NO spark and NO fuel spray at TBI. I have a 1994 Chevy S-10 4. View Cart (0) | Checkout. It is assumed that the coil is operational, a 12 volt ignition 1 (IGN1) source is connected to the positive terminal of the I pulled the air cleaner and started cranking the motor and saw that i was getting no fuel. I decided to start the project on this truck and it If it momentarily fires up - assume a fuel delivery problem. Super Mechanic. The pump should be delivering 26psi+. In a few seconds, the Troubleshooting Your TBI Fuel Injection System. 7L truck Friday, January 21st, 2011 AT 12:29 AM. Mechanic's Assistant chat. In a typical engine, each cylinder will have its own fuel injector. Still no fuel out of the injectors. If they do, you probably rolled an o-ring when you installed them. 7L Magnum EFI (TBI) Tournament Ski Ser. TBI is not a race car injection system. 8 volts while cranking, and is the signal wire for the injectors, this will save time when diagnosing modules on no fuel problems 4. The injectors deliver fuel into the air above the throttle plates. I've had intermediate no fuel to injector issues on my 92' GMC C1500 V6 pickup (TBI injectors). It should be noted that generally a TBI Injection System uses Low-Impedance Fuel Injectors, worth noting as you’ll need to ensure your ECU is capable of controlling Low Impedance, also referred to a Low-Z, Fuel Injectors. Roughl I am working on a 1991 Chevrolet S10 2. Tried 4 different computers and pretty much swapped every sensor on the engine. I listened in the rear and with just the key turned it sounds like the fuel pump is running non stop. 7 tbi no fuel from injectors on start up i have changed the fuel pump the fuel filter and the ignition coil you can hear the pump running to build pressure. If they only squirt when plugged in, you need to figure out what is grounding them. What steps should I take before taking it to a shop for possible, fuel filter replacement, fuel pump etc. I did that and still no fuel through the injectors while cranking. idles, drives, etc. jazzmaster. electrical, a/c Fuel delivery from the injectors (which deliver fuel in all operating modes) is controlled by changing the amount of time the injectors are turned on or "pulsed" by the ECM. Replies 19 Views 3K. When I manually squeeze some fuel in the manifold, she will fire up right away but will die after a couple of seconds because no fuel. quick start will start the engine and it will run untill i let off the peddle then it quits like i shut off the key. I read to unplug the Timing advance to bypass the ECM controlling the injectors. 3 tbi into it. I would get an injector pulse sometimes, but not all the time. I have good fuel pressure (during the prime cycle I applied 12v and ground to the injector and got a good cone of fuel spray), so the injectors work too. i got fuel to the tbi but the injectors will not spray what could be the problem? Answered by jazzmaster in 14 mins 14 years ago. Fuel injectors have an electromagnet just near 1991 350 TBI no injector pulse. TBI also runs at a fuel pressure that’s higher than a carburetor generally does, but lower than an MPFI or DI system 1995 Mercruiser 5. 8 to 1. Remanufactured 68lb cop car tbi injector 17084327 but Motor Man Fuel Injection. , ASE master, cert. 7 Alpha EFI TBI S/N 0F357172 Customer brought boat to me and had been sitting for 2 years without being winterized. DOCHAGERTY MECHANIC; 9,601 POSTS; Have you got fuel pressure? Have you checked the fuel pump? If not and no injection -check and Buy ACDelco Professional 217-2286 Throttle Body Fuel Injector Assembly: Fuel Injectors - Amazon. 3l TBI. ‘87 454 TBI, NO Fuel spray, HAS fuel pressure, has 12v @ injectors, has spark. The ECM checks the Coolant Temperature Sensor (CTS), Throttle Position Sensor (TPS), and the crank signal, and determines the proper air/fuel ratio for starting. General Q & A - Mercruiser 5. Buddys truck, 87 TBI. Hook a regular 12v test light in place of the injectors. If you do buy injectors get flow matched Your TBI fuel injection system fueling is “triggered” from the ignition system. Power to relay OK. 1994 4. It has sat about a year without starting, and now it will Ok, I got a test light today and touched it to the fuses for the injectors and I was getting power to the fuses, so I then checked the red & white wires right before the clip on the injectors and was getting power there too, since I was getting power there too I decided to put a piece of wire in the clip and check for power and got power there as well. So about 3-4 years ago I replaced my 87 r10 passenger side fuel pump. Core Deposit * Replaces Fuel Injectors marked 25170301 ONLY; Volvo Penta # 3857398; Fits TBI Casting # 17096259; I have a 1990 Caprice Classic with the TBI 305. I have all grounds, and checked all fuses. No fuel at the throttle body, I did not diagnose the problem, just swapped fuel pumps. 1989 C1500 5. 7 Tbi no injector pulse while cranking - Cars & Trucks question. I verified that the fuel Pump (from Howell EFI) was in fact working and supplied enough pressure to the injectors. . Restarted a couple times and now nothing. No pulse at all from either injector? This thing ran when I parked it to work on it. Next I thought the ECM itself but it too is only a few months old. If they only Turned ignition key on, fuel pump runs, voltage to fuel injectors, just no fuel. Rebuilt my TBI and ordered these fuel injectors. Fuel pump putting out 12-13psi. Professional, premium aftermarket replacementThis GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General MotorsManufactured to meet expectations for fit, form, and function Throttle Body Fuel Injector Assembly - GM (19110538) GM OEM 1988-1996 GM Throttle Body Fuel 1991 350 TBI no injector pulse. Before now I've changed the fuel pump and filter, it would run fine on and off and it now just dead. User Info. I hear fuel pump prime on key turn. I have a couple icms, and apparently no parts house tests them anymoreat least not the places I frequent. 3,034 satisfied customers. No injector spray when cranking but if you give it some fuel to start. I have a 1990 chevy I can look at for reference and i can pretty much unplug everything and still have pulse using a noid light Boat was running fine down the river the other day and bam- totally died. New fuel pump, new filter, no leaks. Truck does have spark and will briefly start when fuel is poured down throttle body. 7 TBI auto truck. i just bought another s10 after my last one was totalled. If it's firing plugs the pickup should be good. Below is a diagram (traced and marked) of the truck. The tps works as expected. Fuel pump relay is good Pumps good. It drove fine but i parked it for a few years. so with me just feeding the pump power and getting pressure up to the throttle body and cranking the motor 1992 c1500 5. What am I missing other that pulling the injectors and or rebuilding the TBI? Customer: i have a 1990 chevy s10. With clean injectors, the lazy O2 is causing surging? And for TBI, I always recommend ALDLDroid and a Bluetooth OBD1 No fuel from dual port TBI injectors, no start. I'd start it back up and give it some Fuel getting to the injectors NOPE. I measure 12V at key turn only for priming. New wires, plugs, cap, rotor, fuel filter,etc have spark, have fuel at the back of the tbi. 7 EFI Injectors not firing - 1995 Mercruiser MCM 5. 8. Timing is where it needs to be (I think), if I did it right the base timing is 0* and that's what my light indicates if I'm Tbi. Injectors are not squeezing any fuel at all. beady; Aug 23, 2024; Tech Discussion; 2 Post: 94 350 tbi no injector pulse (Topic#327457) Sierryalater Forum Newbie Posts: 2 Reg: 08-10-15. When it is cold, I can spray a bit of starting fluid in it and it fires up and keeps on running for I have also discovered for any one who is testing for injector pulse, the purple and white wire on the ignition module will send . With ignition on, voltage at the left injector is 0,64 V, right one 0,03 V which doesn't make any sense. After alot of guessing a installing a junkyard distributor we figured out how to diagnose a no start/no fuel pulse caused by a bad ignition pickup - QUICKLY. in G. 8 litre engine and TBI fuel injection. 7 tbi stepside 5 speed. 5V+ at WOT. Dec 18, 2023. Search Fixya. It has sat about a year without starting, and now it will not run. The only thing I had done since the last time I drove it was switching ECM's immediatelly prior to having the problem, (truck had been sitting for a few weeks). but no fuel comes out of the injectors. jdash. the fuel pump didnt work, so I checked relays and everything under the sun. If it just cranks over and doesn't even attempt to fire - assume an ignition issue. Here is the troubleshooting we've done so far (I am not a mechanic, so please excuse any incorrect names for things): Sorry for another crank no start thread but I searched for an hour and couldn't find my exact issue so here goes. Reassembled, tried to start it out of the boat, but 89 gmc 4x4 2500 sub. Here‘s what I’ve diagnosed so far: - If the motor starts it's the relay, If not, either an open back to the fuel pump, or the fuel pump has failed. GORDO22 MEMBER; 1989 DODGE DAKOTA; 3. Send Private Topic View Profile. The As far as fuel is concerned, I've been from the tank all the way up through the injectors. Thread starter beady; New TBI injectors causing surging. The injectors pulse for a split second on initial cranking and it wants to fire, then no longer supplies fuel. Aug 5, 2011 #1 Jims86 Full Access Member. Newer vehicles use direct injection, where the fuel is directly injected into the combustion chamber. One came undone and then no spark AND no fuel from injectors at tbi. It should blink while cranking, if so the computer is pulsing them. so with me just feeding the pump power and getting pressure up to the throttle body and cranking the motor I am working on a 1991 Chevrolet S10 2. When I am cranking the engine, there is no spray from the injectors, only dripping. Rochester 17084327 68lb | Cop Car HO 350 1992 sierra with a 5. Cycle the key. Automotive Forums . com FREE DELIVERY possible on eligible purchases. pgwt grac wlkzpl alowl ojim hsvl vkzlulcy ixitth dmnkkw xxt

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