Both seals are in place and the clips have been replaced. Was thinking maybe while my son was manhandling the plenum, some junk fell in the area of the AIS motor and it isn't closing as it should. Any thoughts?Make sure that the blue rubber seal hasn't fallen off the EGR tube as it was being installed.
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Good thought. My son has a tendency to think brawn over brains and could have easily pulled or broke something.Check all vacuum hoses that connect to the upper intake manifold. Make sure no attaching nipples cracked / broken. Make sure all hoses intact and not cracked and oppositve end of vacuum hose is attached properly to its individual device. Leak at power brake booster hose can cause serious vacuum leak and raise slow idle speed.
This morning I plugged all the vacuum ports started the engine with the same result. Pulled the IAC and checked the ohms and came up with 51.4 on the outer pins and 54.2 on the inners. Since I can't find the specs, is this thing junk or in the money?Good thought. My son has a tendency to think brawn over brains and could have easily pulled or broke something.
Checked the IAC as you suggested with zero reaction. Does anybody have an idea how I can check to see if the IAC is bad or ECM has gone south? The book I have is worthless as far as a procedure for this kind of check. Thank You in advance for any help the community can give me.Thanks. That is good to know. So, not everything in this Haynes repair book is to be believed.
I've had the plenum off twice to see if anything moved and came up with nothing. And, tried spraying carb cleaner around the base of the plenum and got no change. Still bugs me that the IAC didn't react as suggested. Just a thought, can I plug that IAC into my 99 LHS and try the same test without harming that ECM? Around here, scan tools are as hard to find as virgins after prom night.The only way I have ever done an IAC/PCM diagnosis is with a capable scan tool. There are tests and commands that can be used to see if the PCM can control and the IAC can react.
If this fast idle just began after the intake manifold/fuel rail/injector service, I'm pretty sure you are dealing with a vacuum leak.
I would pull things back apart for a look.
Good and thanks. But, it will have to wait until tomorrow. Only 16 out there right now.The Rockauto website shows 1999 and 2000 3.5L use the same IAC part number.
HELP! Just installed a new IAC and checked to see if would move before I cranked it and nothing happened. Am I looking at a bad ECM?Tried the test and found out the IAC is dead. We'll get a new one and see where it goes from there. Unfortunately, it gonna take 3 days to get one. One of the few bad things about living in the middle of nowhere. Updates as they happen.
