Idle stalls when embient temp above 90 F

[Alex Vantu]

I have an 86 2.3-16. Let's say this. Got to work, park the car. At lunch time the outside temp. is above 90F and high humidity, start the car, car started right up no idle stalling here, drove for ten minutes to a restaurant, sat down ate lunch for 30 to 45 minutes give and take. Jumped back in the car, start it right up but idle will die right away. I have to keep the gas pedal up to avoid stalling. Once the car moving for at least a minute or two into the way back to work no idle stalling at all even with many stop and go traffic light.

I did replaced the OVP relay recentlyand it didn't seem to help. Could this be a symtom of gas vapor in the injection system??? If it is then is there a way to fix it.

Thank you in advance

Alex

Alex:

Had EXACTLY the same symptoms -- they'll get worse (trust me). You'll be stalling at every stop sign/light at some point in time. Mine started gradually (intermittent stalling/no idle). Got to the point I had to keep my foot on the accelerator at all times -- not easy to do with a 5-speed. Luckily, mine is not a daily driver. Ended up replacing injectors, and fuel pump relay, cap and rotor. Tho' I have the funds, these weren't the culprit.

Long story short -- it's the Idle Control Valve. It's the 1-1/2" diameter x 3" long (aluminum) module that sits between the #2 and #3 intake runners. It's cradled within a rubber bracket and has an input hose (bottom) and output hose (top) with 2-pin electrical connector at its ass-end. Cost is about $170.00 and (relatively) easy replacement. Just be careful, one of the hoses you remove has got coolant running thru it.

Good luck!

Brian16V