Fix one problem, now on to the next

[Tuner]

i had an issue where my suburban was stalling in gear, so i adjusted the idle and now its good once it warms up, but now it drives fine, but the check engine light is showing up about 30 seconds after i put it in park, but once i go through the gears it goes away, how can i check the diagnostics myself, cause my local parts store can only read vehicles that are 96 and up

[2COR517]

Throttle Body to Intake gasket is suspect. They are notorious for cracking, leaking, distorting. While you've got the TB off, give it a good cleaning.

You shouldn't have to adjust the idle. The Idle Air Control does that if everything is working properly. The engine should run just as well cold as hot.

[Jimmiee]

i had an issue where my suburban was stalling in gear, so i adjusted the idle and now its good once it warms up, but now it drives fine, but the check engine light is showing up about 30 seconds after i put it in park, but once i go through the gears it goes away, how can i check the diagnostics myself, cause my local parts store can only read vehicles that are 96 and up

The codes are easy to read on an OBD I vehicle like yours. All you need to do is jump the ALDL terminal and your check engine light will blink out the codes.

Here's a link to the procedure. Click

[Tuner]

Thanks for the info, I'll have to check that out once I get a minute.