I took out the VR air box couple days ago, and since then the car's idle has been real screwy. it idles fine until I start moving. it'll pretty much stall (It has actually stalled several times). I looked at the codes and i'm getting a PCM - P1416 C code. it's apparently related to the AIR system. I'm curious if for some reason the AIR pump took a crap and is causing a problem...

I looked at the hose that connects to the intake box, and it's on there nice and tight. it's also connected to the AIR pump as well.

I also cleaned the butterfly (it was pretty damn dirty) when I took out the air box thing. it did move back and forth a bit, I doubt this caused a problem though. I read this thread and apparently the way it works is when you start the engine the throttle goes to the last known position. now since I moved it back and forth, I'm thinking if I caused a confusion with the sensor. Then I read this thread and there is a re-learn process (i'm going to try it now)

you guys think I messed up the TPS by moving it back and forth to clean it? I just doubt that's possible though. When I step on the gas it's very responsive and just goes. The only problem is when the car is moving and idling. it gets pretty bad if I put it in neutral and come to a stop at a light, it pretty much hits around 200 RPMs, then stalls if it decides to just to make sure, these cars don't have an idle control valve right? the throttle controls how much air needs to come in when the pedal is not stepped on.

any help is appreciated.

ps, I also threw the code HVAC - B0441 C

no idea if that has anything to do with it.

 

Mine did the same thing once when I had the airbox off and failed to get everything put back on right, it was sucking air that wasn't going past the MAF.

 

hmm I checked everything. I actually took it all off, cleaned the MAF and put it back in. still did the same thing. but then I just did the relearning process and drove 30 miles, it acted just fine. letting the car rest for 5-10 mins and gonna do another quick drive, let's see if she remembered what the throttle positions are supposed to be. lol

 

There is a procedure for resetting your idle, I post it if I find it or you might do a search. It involves warming the motor then pulling a couple of fuses and turning if off then installing the fuses and starting it again. Any way I did it and reset my idle.

 

Here you go http://www.c5forum.com/diy/idlerelearn.php

 

Yeah, just did that (it's in my post actually) and afaict the problem has gone away. looks like everytime the maf and all those things are moved around, it needs some time to figure out the air flow?

 

Took it for a 30 mile ride yesterday on local roads. No problem...

Going to work today with cruise control at 80 for about 20 miles and when getting off the ramp, I put it in neutral and let it coast. Sumbitch stalled on me while coasting in neutral...

I took the air box off and put it back on hoping it would fix a leak I had. Nothing...

Wtf can this be?

Still got the p1416 c code as well. I didn't have that before. I looked at both ends of the hose (from air box to the air pump) and both are snug.

Wtf?

 

Sorry I can't edit my post since I'm posting from phone, but I wanted to say how it cant be a leak in vacuum because it would make it isle like crap period. It wouldn't do it at certain speeds, on idle etc. it has to be sensor/pcm related.

What are the items and factors that control idle while moving?

 

Wouldn't that cause a constant problem? Mine is intermittent and does it randomly while the car is moving, no problems idling while stopped, or moving under power or under acceleration