Question about 1990 Chevrolet Lumina APV

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I have air, fire, and fuel to the throttle body but no furl comming out of the injectors. It ran ok on Sunday.

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  • jalber Feb 02, 2010

    Thanks for the info. I disconnected the lead to one of the injectors and moved the other. Maybe my granddaughter said a prayer or it healed it's self. Back up and running, at least for now. A few more miles to go to get to 255,000 miles.

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You need to check to see if the injectors have pulse w/a noid light.

Posted on Feb 02, 2010

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I have an 1987 Chevy with throttle body fuel enjection I have a new fuel pump and new fuel filter I have fuel coming up at the throttle body when I crack the lines but the injectors arnt spraying fuel


I suggest changing the pickup in the distributor. This is what fires the injectors. If you have a noid light you can check for pulse at the injector, but my guess is there is nothing signaling the injector to fire.

Feb 10, 2016 | Cars & Trucks

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I have a 89 rs camaro with the 5.0l can anybody offer suggestions on what the possible fuel system issues are with year and model? I've changed the fuel and air filters rebuilt tbi ran fuel system cl


check fuel pressure TBI injection fuel pressure should be 9 - 13 psi.make sure fuel pressure above 10 psi because throttle body need at least 10 psi. in order to work right.if all is good check see if PCM firing the fuel injectors.go to auto parts store buy noid light.to use noid light you have to disconnect fuel injector electrical connector then plug noid light into fuel injector connector.crank engine watch noid light should blink meaning PCM is firing fuel injectors if noid light steady not blinking PCM not working.if noid light dont light up you have open circuit in the fuel injectors wiring.if check engine light flashing have vechicle code scan.bad tps sensor will also cause problem you are having.

Apr 03, 2013 | Cars & Trucks

1 Answer

How to install a fuel injector on a 2002 jeep liberty 3.7


so that mean the old one is all ready removed.?
or did you mean all steps in the fsm for INJECTOR.
the steps are the same on all EFI fuel rail injectors.
you could google that or you tube it or read the FSM.

hide call keys from step 2 on, or very bad things can happen.
(wife or kids no aware of danger)
ill just cover the (basics)
1: per FSM , depressurize the system, in can be at 60PSI
parked. so avoid fuel in eyes, or a fire. we do that first.
gain access to rail under failure. (RUF) (no barking)
2: remove injector X , wire plug. (failing)
3: then detach the injector rail clamps the both rails off as one....
injector are all now loose, to pull off.
4: add new seals to new injector, and install in reverse order.

that's it, only the gain access , varies,... mostly.

last depressure steps:
run engine,
remove fuel pump relay, engine stalls. key off, hide keys
!

next tje FSM words (just the OFF section)

  1. Remove fuel tank filler tube cap.
  2. Perform Fuel System Pressure Release Procedure.
  3. Remove negative battery cable at battery.
  4. Remove air duct at throttle body air box.
  5. Remove air box at throttle body.
  6. Disconnect fuel line latch clip and fuel line at fuel rail. A special tool will be necessary for fuel line disconnection.
  7. Remove necessary vacuum lines at throttle body.
  8. Disconnect electrical connectors at all 6 fuel injectors. Push red colored slider away from injector. While pushing slider, depress tab and remove connector from injector. The factory fuel injection wiring harness is numerically tagged (INJ 1, INJ 2, etc.) for injector position identification. If harness is not tagged, note wiring location before removal.
  9. Disconnect electrical connectors at throttle body sensors.
  10. Remove 6 ignition coils.
  11. Remove 4 fuel rail mounting bolts.
  12. Gently rock and pull left side of fuel rail until fuel injectors just start to clear machined holes in cylinder head. Gently rock and pull right side of rail until injectors just start to clear cylinder head holes. Repeat this procedure (left/right) until all injectors have cleared cylinder head holes.
  13. Remove fuel rail (with injectors attached) from engine.
end expert.

alldata.com
login and read all steps. that be best , then ask questions?

Jan 02, 2012 | 2002 Jeep Liberty

1 Answer

Daughter ran 97 ranger out of gas, now it wont start, reset the fuel pump button and have gas shooting out of releif vavle, but still wont start, tried many times. Please help. Thanks


You have fuel at the rail, now it's time to see if it's making it past the injectors. Disconnect the air intake duct from the throttle body. Have an assistant crank the engine over while opening the throttle slightly. Spray starting fluid into the throttle body and see if the engine attempts to start. If it does, then the injectors are not firing. The reason the injectors are not firing could be :
1. Blown injector fuse (sometimes marked "INJ").
2. Bad crank sensor.
3. No power to computer.
4. Computer problem (bad injector drivers).
If you have tried to start the vehicle many times, then you should start to smell fuel if it is getting into the engine. If you smell fuel, then let it sit for a while and try checking for spark. An inexpensive spark tester can be purchased from most parts stores. The reason for no spark could be :
1. Blown ignition fuse (sometimes marked "IGN").
2. Failed ignition module.
3. bad crank sensor.
4. bad ignition switch.
If everything checks out, then try disconnecting the battery for at least 20min. the longer the better. If the engine still wont start, then more advanced diagnostics will be needed to determine the problem. I hope that this information is helpful and thank you for using Fixya.com.
WARNING : Wear safety glasses when performing the starting fluid test. Keep hands and loose clothing away from moving engine parts and cooling fan motor. Use caution when working around distributorless ignition systems. These systems produce extremely high voltages which can cause severe injury or even death.

Jun 02, 2011 | 1997 Ford Ranger SuperCab

2 Answers

Throttle body injectors not fiering but there is fuel pressure


the injectors are fired thru the engine cotrol module but it gets its signal to fire from the pick-up located inside the distributor if you are loosing injector pulse only the ignition module is bad if you are also loosing spark when you loose injector pulse your pick up is causing the problem if you replace the pick-up i recomend you change the ignition module when doing so because they work together and you have to remove the distributor to change the pick-up

May 31, 2009 | 1994 GMC Sierra

1 Answer

1993 silverado will not start


make shure you have 9-13 psi fuel pressure

Nov 29, 2008 | 1993 Chevrolet C1500

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