Question about 1990 Chevrolet Lumina APV

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Shut down at highway speed no longer starts

Tuned up changed injectors.turns over does't start

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Spray starter fluid into the air breather. If it starts it could be a bad fuse, connection or fuel pump.

Posted on Jun 23, 2009

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Done an alt. change after doing a tune up truck ran than just shut down now will not start


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1 Answer

I have a 1997 Pontiac Bonneville that is shutting off while I am driving. It eventually starts but it happens over and over. I changed the fuel relay switch but it still happens. what next?


How long since a tune-up? Are there any applicable trouble codes? Some of the national brand auto stores will check codes free. Does it stall at idle or going down the highway?
With extended crank, have a helper crank it while you visually check for spark at the spark plugs. If spark everywhere, use a gage and check proper fuel pressure and check fuel injector pulse.

If injector pulse is missing when problem is ongoing, two things I think of, do you have an rpm signal and security system where applicable. The rpm signal comes from crank sensor. Intermittent problems can be a pain to track. Don't replace anything unless your testing points in that direction.

Nov 06, 2015 | 1997 Pontiac Bonneville

1 Answer

86 Lincoln: started shutting off and not restarting for several minutes. Someone suggested vapor-lock. Removed gas cap waited ten to twenty mins. Started car. happened several times. Then car began to...


No vacuum lock on fuel injection
You have to diagnose the problem
with a sequence of proper testing
Check fuel pressure at the motor with a gauge
Check for injector pulse & spark when it fails to start

Aug 10, 2013 | 1986 Lincoln Town Car

1 Answer

I have a 1996 Plym. Grand Voyager, hesitation & stalling.


If it works well at speed and acts up when slowing or stopped it doesn't sound like fuel filter or pump. You can try running injector cleaner through the engine to clean the carborator injectors or fuel injectors if you have those. Look at replacing the plugs and wires on the motor.

Sep 25, 2009 | 1996 Plymouth Grand Voyager

1 Answer

2001 Grand Prix GT 3800 series engine


The best solution is to do a complete tune up with new spark plugs, wires, fuel filter, air filter, pcv valve and oil change.. If this still happen I would get some fuel injector cleaner, or use marvel mystery oil in both your oil(crankcase) and gas tank. You can get mystery oil at walmart..its in a red bottle with black label.

Jan 18, 2009 | 2001 Pontiac Grand Prix

1 Answer

95 maxima rough idle


The injector could definitely trigger a misfire code, but you also mentioned that you had a mass airflow sensor code , that code code be responsible for te sluggish moment of the vehicle and rpm going up and down. However if you have a misfire onCyl#6 and the coil and the plug is good the ONLY other thing to cause a mis-fire would be the injector. To check the injector get a NOID light, you can get one at almost any auto-parts place. To use unplug injector plug from the bad injector and connect it to NOID light the light should have a steady PULSE/ligt flickering. If light flickers fine then injector is bad and will need to be replaced. If light doesn't flicker or flickers intermittently then you may have a bad wiring to that injector. Check if wiring is good, then you may have a bad cam sensor or sensor gear. Good Luck and contact if you need more help. Thanks for using FIX YA

Jan 13, 2009 | 1994 Nissan Maxima

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