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View Full Version : TPS adjustment caused idle problems


19iroc88
06-04-2012, 05:32 PM
Hey guys, Yesterday i cleaned my iac and adjusted my tps because I was getting a code for tps and maf. I got the tps adjusted at about 0.58 and checked the maf. Now i'm having trouble with cold starts. The car just wants to die when i start it unless I give it a little gas, but once its warm then it runs beautifully with great throttle response, and only an occasional ses light. Anyone have any suggestions of what to look for? could it be a bad tps?

1988 350 TPI

The Fixer
06-04-2012, 06:54 PM
Did you reset the IAC as well after pulling it out to clean it? Another thing to check is if the 9th injector is spraying properly. If it's gummed up, it won't allow the extra fuel needed on cold start. If you find out it's bad, get the 9th injector blockoff kit (plugs the hole in the runner and caps the fuel rail) and switch to a chip from an '89 350 car. They still had MAF TPI, but no 9th injector for cold starts.

19iroc88
06-10-2012, 07:34 PM
yes I reset the IAC, the problem seems to be getting better, but ill still take a look at the injector thanks for the tips