1993 olds cutlass supreme 3.1 convertible

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flightcommander
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Joined: Fri May 09, 2014 4:17 pm

1993 olds cutlass supreme 3.1 convertible

Unread post by flightcommander » Fri May 09, 2014 5:03 pm

I have 4 problems at the same time. First the idle drops low and car dies, then the a/c quits and the speedometer and rpm guage drops down and then transmission goes into 3rd gear. After about a minute everything returns to normal. I got another computer from junk yard and put in the prom from the original computer but car runs the same and now it is always in third gear. Engine runs perfect except for above problems. please help!


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carriedi
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Location: Oregon

Re: 1993 olds cutlass supreme 3.1 convertible

Unread post by carriedi » Sun May 11, 2014 8:00 am

best thing to do on this car is drive it with the scanner on it and see what is happening. It's possible you may have a fuel pump problem. You also might have an idle air control problem. With a scanner hooked up to your car while driving it you can watch the IAC reading when your at an idle. As you drive you can watch to see what your fuel trims are and watch what changes when your car starts to act up. If your engine starts to ping (knock sensor) the computer will retard you spark. if you have codes stored in memory, they could help to figue out what is happening. Has you check engine ever come on while you're driving?
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flightcommander
Posts: 2
Joined: Fri May 09, 2014 4:17 pm

Re: 1993 olds cutlass supreme 3.1 convertible

Unread post by flightcommander » Tue May 13, 2014 1:22 pm

carriedi wrote:best thing to do on this car is drive it with the scanner on it and see what is happening. It's possible you may have a fuel pump problem. You also might have an idle air control problem. With a scanner hooked up to your car while driving it you can watch the IAC reading when your at an idle. As you drive you can watch to see what your fuel trims are and watch what changes when your car starts to act up. If your engine starts to ping (knock sensor) the computer will retard you spark. if you have codes stored in memory, they could help to figue out what is happening. Has you check engine ever come on while you're driving?

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