Ac on, car stalls.

the5.ohh · May 25, 2016

Long story short... trickflow hci, 24# injectors, matching 76mm maf, egr delete, smog pump delete, walbro 255 lph fuel pump, 70mm tb, all new and upgraded valvetrain components. Anywho.. car doesn't have a tune, I'm on a waiting list to bring it. Turn my AC on at a light, and idle drops and immediately stalls. Turns right back over but if the ac is still on, shuts off. Now.. if I rev it up and take off, it'll buck and shake a bit all of first gear. Turn the ac off, and she runs perfectly. Bad iac? Maybe a tune will rectify the issue if it had been caused by the HCI swap and lack of tune.

lutter94 · May 25, 2016

I would tune it before throwing parts at it.

ttocs · May 26, 2016

your nuts! Start at the back at the tranny and work your way forward. Replace everything!

You can test teh IAC with a volt meter to be sure its moving. Could be as simple as a vac line as well

the5.ohh · May 26, 2016

ttocs said:
your nuts! Start at the back at the tranny and work your way forward. Replace everything!

You can test teh IAC with a volt meter to be sure its moving. Could be as simple as a vac line as well

Hahaha I have like two spare IAC's lying around. I'll swap it, and check the vacuum lines

ttocs · May 26, 2016

easiest way to check vac lines.

[video=youtube;rumgJ5UBpCw]https://www.youtube.com/watch?v=rumgJ5UBpCw[/video]

TrickVert · Jun 16, 2016

If you unplug your IAC and the idle drops, it's a good bet it's working as designed. I'd suggest performing a base idle. Also, cammed cars typically require a bit higher idle than stock. The 94/95 computer doesn't like H/C/I changes. Can you fiddle around and get it to run OK? Yes. Will it be optimal, no.

Andy