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1993 Chevy Corsica is flooding severly
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Guest
Anonymous Poster
options66@yahoo.com
Sep 21, 2006, 7:19 PM
Post #1 of 7
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1993 Chevy Corsica is flooding severly
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I have a 1993 Chevy Corsica with a 2.2L 4 cyl. with a single port throttle body engine. It has been rebuilt and carefuly re-assembled. It starts if you hold the gas pedal down but only runs for 3 or 4 seconds and then severly floods out. It is pumping so much gas into the engine that it actually ran out of the muffler. What could be causing this?
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steve01832
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Sep 22, 2006, 2:51 AM
Post #2 of 7
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Re: 1993 Chevy Corsica is flooding severly
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The first thing I would do is put a fuel pressure guage on the test port, a noid light in the injector connector, and a spark tester in one of the plug wires. Let's make sure the fuel pressure is around 35psi, the noid light flashes while cranking, and we have spark. Not to jump to conclusions, but, really watch the noid light when cranking, it should blink. I have seen plenty of Corsicas and Berettas with this symptom that the noid light stays solidly lit indicating a shorted injector driver in the ECM. If all tests check out OK, you will need to post again so we can go further.
(This post was edited by steve01832 on Sep 22, 2006, 2:55 AM)
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Anonymous Poster
Sep 24, 2006, 3:29 PM
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Re: 1993 Chevy Corsica is flooding severly
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Fortunately, I have a second 93 corsica that is identical to the one I am working on. Same everything, except radio. I took the ECM out of the 2nd car and tried it in the 1st car. Same symptoms. I haven't tried the noid light yet, but does that come from the ECM? I'm learning as I go so I have replaced several parts that was good from the other car. After the last switch (ECM) the car started for a few seconds and then flooded out again. Could there be anything else?
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steve01832
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Sep 25, 2006, 9:29 AM
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Re: 1993 Chevy Corsica is flooding severly
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The first thing that needs to be checked is the fuel pressure. If it is too high, every time the injector opens the engine will receive too much fuel.
(This post was edited by steve01832 on Sep 25, 2006, 9:32 AM)
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Anonymous Poster
teresamarsden@comcast.net
Nov 12, 2006, 8:12 AM
Post #5 of 7
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Re: 1993 Chevy Corsica is flooding severly
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I ran into this exact problem once and the reason was the wiring to injectors where it runs around the block rubbed through the insulation on a ground wire that acted like the ecm was commanding the injectors to full fuel all the time. I only took minutes of cranking to fill the crancase with fuel it was pumping so much out of the injectors. try moving the wiring around to get it off of any rubbed spots and see if engine will then start. if it does trace wiring back from injectors and find worn spot.
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ucarifix2dy
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Nov 21, 2006, 5:29 PM
Post #6 of 7
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Re: 1993 Chevy Corsica is flooding severly
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only 2 things i ran across tho 2.2 engine is if timing is off it will flud the injector driver is messed up witch you would then replace the ECM o last but not least firing order is correct
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Anonymous Poster
Jan 27, 2007, 2:16 PM
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Re: 1993 Chevy Corsica is flooding severly
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Use a test light at the injector harness. Turn key off. Disconnect injector wiring. Turn key on. With the light clip to ground, one of the wires should light, indicating battery voltage is available at that wire. We'll call that wire "A" The other wire ( wire "B" )should show nothing. Now switch the test light clip to the positive battery post. Check wire "B" again. It should still show nothing. If it does show now, you have a short to ground on the injector driver circuit. Common causes are ECM, wiring rubbed through, improperly installed anti-theft switches / modules, pinched wiring between components, and invasive damage ( peeling insulation for testing, etc. You've already tried a PCM. Good start. You need to see if the driver circuit is grounded.
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