Question about 1995 Buick LeSabre

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Engine stalls #6 cylinder not fueling. Replaced fuel injector, plugs and wires. Checked compression. All good. Removed injector rail and placed #4 injector plug on #6 and injector started fueling. Placed #6 wire back on #6 injector and it stopped working. #6 on #4 injector causes #4 to fail. What makes #6 injector be the only injector that won't work?

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  • Jeff Turcotte
    Jeff Turcotte Oct 07, 2010

    the wire or connector is bad, right?



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Sounds to me that you need a computer since the injector gets its signal from the computer. You can get a noid light from auto parts store to test the wire attached to the injector. The light should flicker when cranking the car. No flicker chances are you need ecm.

Posted on Oct 07, 2010


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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.
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ill just cover the (basics)
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2: remove injector X , wire plug. (failing)
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that's it, only the gain access , varies,... mostly.

last depressure steps:
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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.
login and read all steps. that be best , then ask questions?

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2 Answers

Check engine light is on, they say multiple miss fire in cylcinder 6. but no one can find the problem van runs great

first do a cylinder compression test on engine to verify good engine compression this should be around 110psi to 175 psi check for vacuum leak, intake port for #6 cylindermay be leaking air, or also check coil for that cylinder, if wire and spark plug have already been changed, last replace fuel injector for that cylinder.

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Hello i really need some help badly!! i have a 2006 dodge stratus my engine light is on & it blinks when i am like sitting at a redlight the codes said p302 cylinder 2 misfire we have replaced the...

Hi, other possibilities are the ignition wire, the injector, or a burned valve. First I would pull the wire up from the plug to see if I could hear sparks jumping. If no sparks, replace wires. If wire was good, next make sure the injector is clicking when the engine is running. If it isn't clicking, the problem is either a failed injector or the wiring. Pull the connector and probe the terminals with an AC voltmeter to see if it's getting a signal (if not, replace the injector). If it's clicking, it may be clogged. You can pull up the fuel rail with injectors attached and then crank the engine to see if the injector is pulling out gas like the others are. Before doing this, it may be less work to run a compression test to see if you have a burned valve. If the engine fails a compression test on cylinder 2, you will need to pull the cylinder head off for repair. If the compression is good, then I would pull up the fuel rail to check the injector.

Please see my tip at . These are generic instructions. If you get stuck, please get back to me.

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Have a 1999 Toyota Tacoma with a 3.4. Vehiclw was brought in 4 pinging under acceleration. Check engine light was on with a TPS code. Upon diag we found the plugs very worn. 140K on vehicle so we did a...

Most likely I a would suspect the fuel rail had moisture in it. If you checked emissions it would most likely show no HC and alot of 02 and no CO. If it does show alot of HC then I would suspect sticking valves intermittantly . The pinging really points to no fuel issue tho. If you pull the injector connector off and no change then I would remove the fuel rail and inspect. Also make sure the wires are in the correct locations. It easy to get them wrong.

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2 Answers

95 Jimmy 4.3L

Try some injector cleaner in the fuel--might be a problem in # 3 injector. One cylinder misfiring should not cause the engine to stall. Replace the fuel filter, and check the air filter. Does this engine employ a distributor or a coil-pack?

Aug 08, 2009 | 1995 Chevrolet Blazer

2 Answers

Check engine light on

Here are some possible causes: PO306 means cylinder #6 only.

Possible Causes onepx.gif Setting Conditions onepx.gif onepx.gif onepx.gif onepx.gif
  • Air leak in the intake manifold, or in the EGR or PCM system
  • Base engine mechanical fault that affects only one cylinder
  • Fuel delivery component fault that affects only one cylinder (i.e., a contaminated, dirty or sticking fuel injector)
  • Ignition system fault (coil or plug) that affects only one cylinder

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1 Answer

99 buick Lesabre

hey thanks for bringing me up to speed. ive been working on many other problems but with your great explanation i remember.
we need to check the compression on that cyl. and compare it to the compression on 2 other cylinders your choice.
but before you do this get a can of carb cleaner . and with the car idling spray around the intake manifold in the area of #6 cyl. what we are looking for is a small vacuum leak that would also act like this. with the engine idling and spraying around the intake the engines idle sould not change and if it does when you spray you have an intake leaking.
let me know how it turns out.

Sep 22, 2008 | 1999 Buick LeSabre

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