Question about 1996 Pontiac Sunfire

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I put a new fuel injector in a 1996 pontaic sunfire now the engine floods out with gas

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Check and make sure the injector's O-ring's did not get damage or fall out while installing injector's.

Posted on Aug 23, 2010

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Have 1997 sunfire had a injector that was cracked an leaking replace it with new one now can is rough to start an dies when stoping


pull that injector again and replace the seals with new ones as it appears that the fuel is by- passing the injector and flooding the cylinder.

Jan 25, 2015 | 1997 Pontiac Sunfire

1 Answer

Fuel engine stops then start up in 1 min


You probably have an electronic ignition system to go with those fuel injectors. It sounds like it runs just long enough to empty the fuel out of the injectors, which means there might be a vacuum problem. I'm a carburetor person myself. Are you sure it sound like it NEEDS gas or could it be flooding?

Mar 29, 2014 | 1991 Ford F150

1 Answer

I took my motor out of a 2003 sunfire and installed in a 2004 sunfire, ran good in other car but is flooding mad in the 2004 ,puzzled


Usually a flooding problem is a shorted fuel injector or a leaking fuel pressure regulator. Does it happen if the injectors are unplugged ?

Feb 11, 2014 | 1996 Pontiac Sunfire

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My1996 pontiac sunfire will turnover ,but want start . The lights go dim when you press the gas . what is wrong ?


You will have to pinpoint what the engine is missing...
- Spark
- Fuel
- Compression

All three of these are tested when the engine is being cranked over. There are two way of checking for fuel. Fuel pressure and fuel trigger. Both are very important and must be present for the engine to start. Fuel pressure is self explanatory. You just hook up the gage and see what the reading is. Fuel trigger is check with a noid light. The injector gets unplugged and the noid light gets plugged in to the injector clip. With the engine cranking over, this light must blink. This is the signal to the injectors from the computer. You can have all the fuel pressure in the world, but it wont matter if the injector is not pulsing gas into the cylinder like it should.

Compression tester, spark tester, fuel pressure gage and noid light are all accessible at your local auto store. All three tests play a very important part in diagnosing a no start condition. Be extremely careful when doing these tests.

Apr 16, 2012 | 1996 Pontiac Sunfire

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Sunfire runs rough at idle then seems to flood out to where it cant stay at a steady rpm when u adjust the gas pedal. will stall after idling for long time. fuel press reg seems fine. unhooked battery


the hole in the filler neck won`t cause this problem.do you have a check engine light on.this could set the light on as it can affect the evap/tank pressure sensors vacume.check for codes in the pcm(computer).rough running can be caused by bad plugs/wires compression,injector problems.timing sensors,anything to do with fuel or ignition.check for codes then check the other items.

Jan 08, 2012 | 1996 Pontiac Sunfire

1 Answer

97 sunfire 2.2l, changed fuel pump, now injectors keep squirting fuel after engine is turned off, also floods out and dies after few moments running


fuel pressure regulater or relay is going bad or a fuel return problem check hoses going back were u done repair good luck

Dec 20, 2010 | 1997 Pontiac Sunfire

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I have a 99 olds alero. I can drive awhile park the car try to start it and it won't crank. Newer battery and alternator. Mechanic is thinking manifold sensor. plz help


IF CAR TURN OVER NOT CRANKING AFTER A SHORT DRIVE WHEN ENGINE HOT.DIRTY CLOGGED FUEL INJECTORS FLOODING ENGINE OUT.CLEAN FUEL INJECTORS.FILL GAS TANK UP.PUT A CAN OF SEAFOAM IN FUEL TANK.DRIVE CAR AROUND TO HELP FLUSH OUT CARBON ON THE INJECTORS SEATS TO STOP GAS DRIPPING CAUSING FLOODING.IF CAR WONT TURN OVER.BAD BATTERY CABLES OR STARTER.SCAN IT FOR THEFT SECURITY PROBLEMS. IF STARTER TURNS OVER NO CRANK ENGINE FLOODING DUE TO DIRTY FUEL INJECTORS.

Sep 26, 2010 | 1999 Oldsmobile Alero

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Fuel injecter locations , one or two need to be replaced,1996 pontiac sunbird 4 cylinder


The injectors on the vehicle are going to be located on the rear side of the engine along the base of the intake. Find the fuel line coming up to the engine from the bottom of the car and follow it until you see where it connects to a metal line. Follow the metal line until you find the first injector and then follow it until you find the rest of them. Disconnect the battery, unbolt the fuel rail, unplug the injectors, remove the rail with injectors and replace the injectors and put back together.

Sep 13, 2009 | 1996 Pontiac Sunfire

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It takes a few seconds with the gas floored to get it going. once it is warm it starts fine. I did smell a faint gas smell a week ago. it has 50k miles on it. wondering what it is and what it should cost


Possibly a leaking fuel injector(s). When you floor the gas pedal when cranking it puts the computer into clear flood mode which shuts off the injectors.

Mar 07, 2009 | 2005 Pontiac Sunfire

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