Ok, I need some help. My car keeps stalling when in traffic especially with the air conditioning on.

When driving in traffic and moving a few feet at a time (giving it a little gas moving up a car length and then letting off the gas) the idle drops down to low and the car stalls out. This happens all the time when the air is on and randomly when it is not. I tried raising the idle up by adjusting the screw but that does not see to help. It does make it idle higher but it will still drop and stall. Even when reving the engine to try and keep the rpms up - it still sometimes drops back down and stalls.

I have 264i/272e cams. Is anyone else having this issue? Any ideas on what I can do to fix it?

thanks,
-Doug

 

are you tuned? sounds like your either running to lean or to ruch at idle. Do u have an intake? get an hks eids

 

I have it with the 280's, and ONLY with the alky kit Off but plugged in (idles lean). If I unplug the alky kit, prob goes away! wont stall at all. re connect the alky pump, and connect the MAP sensor, dies at idle! still working out the bugs on the alky kit as to why. Go see some of my previous threads on this, have some good input!

 

Well I used my sAFC and added 10points of fuel @ 800rpms. It will stumble but NEVER stall @ all.

 

I also added 10 points with my SAFC at 800 rpm's but it still stalled...

I had the alky kit when I had my dynoflash and it did not stall at all. Now with my Xede custom tuned it is stalling like crazy. Since I had the alky kit before the Xede and had no stalling issues I have to believe that it is not the Alky kit causing the problem.

It is weird as that even if I raise the idle up to like 1300 rpm in traffic when giving it a little gas and then letting off it will still sometimes stumble. Also when I switch on the Air conditioning the idle drops to like 800 rpm's so any flucations at that point will stall it.

I will try and search more threads for information. In the mean time I thank you for your input.

-Doug

 

Damn Doug sorry to hear you are having those problems. I seriously doubt it's the alky kit since it's not spraying at idle.

I'm pretty sure you can try to add fuel with the AFC but the ECU will compensate for it -- check your AFR's the will not change (atleast in my case it does not). Have you run this by Shiv? I wonder if you could incorporate more fuel into the SMART system at idle....just a thought.

 

do you have a BOV that vents to the atmosphere? or recir?

 

my car feels like it will stall on rainy days with the ac on only. I think with cams bov and intake its normal it will idle low to like 800rpms but then go back up and then you can really here the cams working but it should not stall can u visit a tuner? Like turbo trix I would recommend having him tune it or checking it out. my turbo timer tells me how much volts are in my car battery i notice when it idles low almost as if it would stall but it wouldn’t the battery level goes really low to 12.2 12.4 volts where it would normally be 13.8 or 14.2...

 

When I had 264's in my 03 it would stall when I "had" to turn on the a/c for my wife. Besides that, I never turned it on and I never had a idle problem.

 

I have a recir BOV...

yes - it very rarely happens when the air isnot on. When the air is on it happens all the time.

It was tuned by Shiv and after that it started stalling. When I had the Dyno Flash it did not stall.

I had the Alky kit the with the Dyno Flash as well.

I raised the idle hoping it would help but now I get an idle to high error thrown P0507 I believe is the code.


The weird thig is that it is not just the idle being low that is the problem. If I run the car at idle just sitting there it will never stall. But when I am in traffic (mostly with the air on) and have to move up a few feet at a time (give it some gas and then let off) the rpm's drop very low and the car stalls. I have to constantly rev it in that situation 2-3 times to get them to go up and stay up. That is the issue I am trying to resolve.

Could it possibly be the idle air control valve???? Any thoughts on this???

I am talking with Shiv as well and hope to get it resolved soon.

thanks to everyone for your input,
-Doug

 

I bet if you look at what point of vacum your bov "leaks" you will find that when turning the ac on there is not enough vacum to unseat the diaphram and that will cause the stalling. Did you change your bov or the spring rate for it? I found backing off the spring rate on my Type S it got rid of the stalling with the AC on. First I tried a higher idle but that did not help. If you are running a uncrushed 1g then nevermind, they have a small bypass built in to leak at idle.

 

I think I have a slightly crushed 1G. So you are saying to uncrush it a little????

-Doug

 

I have the same problem with 272 cams. I have a recirced BOV and have tried several BOVs including the JDM MR BOV and I still get the same problem. After the car stalls, it is very difficult to crank the engine and it will sound rough for a few seconds. I've tried leaning it out (660 injectors) and richening it with the SAFC but to no avail. Also, these seems to happen much easier when the car is on an incline.

Recently the problem has gotten better as the idle does not fluctuate as much and the engine will not die, even with the AC on. Maybe the ECU needs to "learn" a little bit before it realizes it needs better idle. Don't know.

 

well nice to know that someone else has the same problems.

 

Damn........ What a piece. Mine drops but never stalls. what BOV u running? I have a HKS SSQV.


Jon