cold start problems

[89camaroperson]

Is there a vacuum valve that opens and closes...or some sensor that controls one. because it really seems like it dumps the vacuum for a second or two and then comes back.

[wrightz28]

Originally Posted by 89camaroperson

could also be the tune up i just did. .

Even tho it's new ot the car doesn' treall ymake it completely new. And I've seen some of those "2 year" plug wires coom e out of the box with cracks in em because they've been sitting on shelf for a while, and one particular parts store likes to keep their's behind the registers in direct sunlight.

Also have seen plugs with cracked insulators, so jsut keeping with a suggestion.

But since you mention moisture, I'd start with the wires.

[wrightz28]

Originally Posted by 89camaroperson

Is there a vacuum valve that opens and closes...or some sensor that controls one. because it really seems like it dumps the vacuum for a second or two and then comes back.

EGR

[89camaroperson]

brand new egr valve....and i believe that that should throw a code....at least it did till i replaced it....

[wrightz28]

Originally Posted by 89camaroperson

brand new egr valve....and i believe that that should throw a code....at least it did till i replaced it....

yeah, all things being equal, which they're not. IT's gotta be something silly. I keep forgetting to ask people if any work or anything has been done, when did it start to act up etc.

Did you reset the ECM after replacing the valve, all the lines are cool? Couldn't be the gasket, that would, should make it run like crap @ all times.

[89camaroperson]

does cutting the power off at the battery count for resetting? Ive checked for any codes and it comes up empty. I really hope its something silly. Any idea what an IAC or intake air control(i think thats what the means) does? Im at work and dont have my manual.

[instantkevin]

damn... i always forget stuff when I'm on the forums. get me in the garage and no problem. (I been tryin to figure this problem out for a while). The light in m head just came on.

Yes... check the IAC (Idle Air Control). very frequently on many cars the valve inside of it will get stuck in a open position. this will make cold starts incredibly difficult... but it will run fine when hot. before you try to start the car, tap on the IAC with a hammer or something several times, then try to start. probably will start right up.

remove IAC, spray with wd-40, make sure valve will move freely without becoming stuck. replace IAC.

I had same problem on my 3.1 V6. My girlfriend had same problem with her 2002 Escape. Would try to start 10-20 times in the morning for weeks, before it actually started. A couple of taps to the IAC... problem fixed.

[89camaroperson]

the car starts just fine. But maybe the little valve is sticking. hmmm....I will investigate and take a look at my iac valve. I hate being stuck at work....cant do anything on my car...

[wrightz28]

That does bring up an interesting aspect of things definatley say if it is.

I ran a bypass of the coolant lines off the t/b not too long ago, and when I did so the hose is kinda really close to the valve. I noticed this morning a slight power loss utnil the things warmed up a little. No problem starting tho, just seemd a little lean.