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1993 Chevy Corsica '93 Chevy Corsica problem.

Tiny
JMITCHELL333
  • MEMBER
  • 1993 CHEVROLET CORSICA
Engine Mechanical problem
1993 Chevy Corsica 6 cyl Front Wheel Drive Automatic

Hi. I have a major problem with my Corsica that Im hoping you can help me solve. When driving the car it will start to sput and then eventually die. We have inspected the fuel injectors and cleaned them as well as the fuel pressure regulator. We've replaced the MAP sensor and replaced the O2 sensor twice. The fuel pump has also been replaced twice. I also just replaced the gas tank. The problem still persists and it just seems as if the car is losing power or something. What else should we do?
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Friday, September 25th, 2009 AT 2:36 PM

8 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
If you have a vacuum guage connect it to the manifold and see what your reading is. If it is below 15" try to disconnect the catalytic converter it may have plugged on the inside.
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Tuesday, September 29th, 2009 AT 6:55 PM
Tiny
JMITCHELL333
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Since Ive asked this question we've figured something out. I found a paper clip and was able to retrieve a code from the SES light. Code 42 came back as an Ignition Control Circuit. We replaced the ignition switch but to no avail. Any other suggestions or insight about this code? Thanks in advance!

-Jeff-
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Tuesday, September 29th, 2009 AT 10:45 PM
Tiny
HMAC300
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If you are getting a code 42 then i'd go for the coil pack or control module that the coil pack is mounted on. I'd also check the coils for resistance as you only have 3 coils for all 6 cylinders. If one is bad it will take out 2 cylinders.
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Wednesday, September 30th, 2009 AT 9:39 AM
Tiny
JMITCHELL333
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Well we replaced the ignition control module and the SES light has not come back on. However, the car is still sputting when you hammer down on the accelerator. The lights on the car also dim when it starts to sput but brighten up when it quits. I also heard a "knocking" sound around the accelerator area when I pump the gas to get the car to keep running. There are no other trouble codes besides hat was fixed. What could be the problem?
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Saturday, October 3rd, 2009 AT 1:37 PM
Tiny
HMAC300
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If it sputters and bogs, i'd first clean the throttle plate with choke cleaner and then check to see if the maf is working correctly. Also clean the battery cables as it may not be getting enough power from the battery or the battery may not be in good shape. When the battery is low the computer does screwy things.
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Saturday, October 3rd, 2009 AT 2:37 PM
Tiny
JMITCHELL333
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Would an engine light be on for the MAF sensor? The Ignition Module replacement turned the SES light off and it hasnt come back on again and we've ran it 3 or 4 good times. I just came back from a run and I noticed this. It'll run fine when Im just BARELY pushing the gas. It'll slowly creep up to highway speeds but if you just push the gas like you normally would or try to hold it to the floor it'll try to bog down and sput. Taking it very slow doesnt cause any problems. What's that sound like?
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Saturday, October 3rd, 2009 AT 8:27 PM
Tiny
HMAC300
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This is kind of tough as it's a thing that needs to be driven then going thru here. Alot of times the maf sensor can be bad and the way I tested them was to bang them with a screwdriver handle. If they were bad the car would quit riunning. It may be your tps sticking as well is the only thing I can think of. If you can take the thin nozzle of choke cleaner and spray all around the tps linkage and close to the tps it may have some dirt in it maybe making it do this. Other than that I have no ideas.
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Sunday, October 4th, 2009 AT 1:22 PM
Tiny
JMITCHELL333
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  • 5 POSTS
I will give that a try tomorrow and see if I can come up with something. I found out the reason it overheated lastnight was because the fan wasnt plugged back in when my stepdad took it off to put that module on. Well sir, I really appreciate your help and insight. We'll keep trying.
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Sunday, October 4th, 2009 AT 8:45 PM

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