i'm in traffic this morning and as soon as i slow down to a stop the idle drops and the engine cuts off. no check engine or any lights come on. what's going on? it happened twice. a couple of times i've noticed that when i start the engine it doesn't catch right away. its not a smooth start up. could it be the timing, spark plugs, fuel injector, what?

 

take it to the dealer.. NOW!

 

If it is driving fine otherwise it is most likely the IAC valve.

 

I hate stuff like that. About 6 months ago during the work week I went out to lunch by myself. When I finish and go to head back to work my CLS would not start. It would turn over and turn over, but no fire/spark. After about 8 to 10 attempts I pulled the key out of the ignition and waited a minute or two. Put the key back in and it fired right up as usual. Since that happened I have not seen this phenomenon reappear! Strange!

 

Take it to the dealer. My guess is the starter, alternator or if your really screwed exhaust manifold. My $.02. but good luck anyways

 

unfortunately my warranty has expired. i took a drive about an hour ago to see if it would happen again. started up fine and drove around for 10 min.... nothing. what's the IAC valve?

 

This happens to me sometimes. I told the dealer about it and of course they cannot reproduce it. There is a TSB about the fuel pressure regulator. I asked them about that and they said it was not for the problem I was describing. So now I just have to deal with it.

 

every morning when i start the engine. it sounds like it s gonna stall... but never did ( that s when the engine is cold)

 

Idle Air Control Valve, it controls the idle when at a low engine speed with the throttle closed. When cloged or failing the car usually shows similar symtoms.

 

cool! thanks all, for helping. btw where is the IAC valve located?

 

At the base of the throttle body. You could pull it off and spray carb cleaner into the passeges and then re-install it. This might help with little to no expense.

 

You are out of warranty, have problem, so order for yourself a HELMS service manual.

Okay!

 

When was the last time you changed the fuel filter?

 

fuckn weird! same exact thing happen to be about a week ago! i really love my car i just wish more quality went into the MAKING of it

 

STS, I have the Helms manual if you'd like to borrow it. PM me or call me on my cell.

 

My car did this (stall) two or three times with in the first year of owning the car... then it never happend again. Its been at least a year since it did that.

 

fuel pressure regulator. it's a tsb, they already replaced mine.

take it to the dealer.

 

do you have the tsb #?

 

One of the local Vancouver guys had the same problem, and I think a TSB issued for that., I think.

 

Been a member for a while, but never posted anything till now. Thought this would be extremely helpful to those CL owners that ever had their car stall on them at a stop OR ever had a problem where the idle surges between 1000-2500rpm at a stop. Here's the problem: a defective binding air control valve on the throttle body. The entire throttle body was replaced (P/N 16400-PGE-A11). It was the cause of the above problems on my '03 6-spd when it had ~4000 miles on it. Dealer couldn't find the problem b/c the C/E (Check Engine) light didn't light at that time. Problem never came back till 7000 miles later. This time the C/E light came on. Fixed under warranty. Problem never came back.

 

item # 617703
service bulletin # 01001
seq. # 176

 

I had this problem too where my car stalls when it slows down and comes to a stop. It happened to me about 8 times although the dealership could not reproduce it. It drove me nuts...

Anyhow, as luck would have it, they cleaned out a filter of some sort for my fuel injection (I THINK) and everything's been fine ever since. I hope it all works out for ya! Good luck.

 

thanks!

 

http://www.nhtsa.dot.gov/cars/problems/tsb/index.cfm