IAC question

[rworks]

OK, so I did a search and I think I have the answer. I just wanna make sure.

 

87 Renix 4.0L in the last month or so has been giving issues at startup. Will run for maybe a second or two then die. If I give it some throttle for a minute or so at startup it will run fine from there.

 

So I've checked the vacuum lines, cleaned the throttle body, checked the plugs, fuel pressure, etc.

 

Started it and it still does it.

 

So I pulled the harness connector off the IAC and started it. Ran fine. No problems.

 

My take from reading about 300 posts in the search for IAC stuff is that I need a new one.

 

Would like a 2nd opinion before I do it.

[Geonovast]

You can try removing it, and cleaning it with some throttle body cleaner and a toothbrush. It may just be sticking.

[cody4359]

:agree:

[rworks]

You can try removing it, and cleaning it with some throttle body cleaner and a toothbrush. It may just be sticking.

 

Did that when i cleaned the throttle body.

 

Any other suggestions?

[Geonovast]

If you already cleaned it, then yeah, you probably need a new one. Not much else you can do with it.

[rworks]

If you already cleaned it, then yeah, you probably need a new one. Not much else you can do with it.

 

 

Is there a test procedure for the IAC like there is with the TPS?

 

Anyway, I'll get a new IAC tomorrow.

 

The funny thing about the IAC and TPS is that when I got my 87 MJ in 2007 she still had the original IAC, TPS, and a few other engine bits. Crappy parts, only lasting 24 years. ;)