welchk85

Ok I have a 90 camaro with the 3.1 It is currently my only vehicle and I have getting a very high idle not getting any codes I can adjust the idle screw all day up and down and it doesn't seem to make any differences I need this fixed asap and don't have the money to bring it to the shop. Please help I need to go to work again in the morning.

Maverick H1L

iTrader: (8)

Vacuum leak or TPS problem... Check both every vac line and fitting along with the connections at the valve covers and the TPS signal with a DMM or scanner, depending on what you have.

welchk85

and what if i dont have a dmm or a scanner haha i will check for a vac leak the pcv valve is in the valve cover without anything holding it in could that be the issue?

AM91Camaro_RS

that "idle screw" isn't supposed to be touched. its set at the factory and thats it. with the electronics of the idle air control valve, adjusting that screw won't help you any. check out Harbor Freight (if there's one near you), you can get a digital multi meter for like $4.

welchk85

yeah we have a harbor freight right down the road. i dont see how it could be a vac line because they have all been replaced within the last 2 weeks and im not getting any codes coming up so other than the IAC what else could it be? i did have to use water in my coolant a couple days ago because it was running low and i didnt have enough to safely get home i dont understand that either because i have no leaks and its not in the oil.

Gumby

playin with the idle screw is dumb, it will just un do what you did.

you check the voltage of the TPS with a $7 volt meter.

Maverick H1L

iTrader: (8)

If the PCV valve is just sitting in the valve cover hole, that would be your vac leak right there. Most parts stores will either carry the grommet in the Help section or they can order it. The valve cover creates one leak, and the PCV valve another, and neither are like a cracked vacuum line... More like removing one of the larger lines from the plenum or even the MAP sensor line.