Hot weather stalling

[SHOmuchFUN]

I'm having problems with my 1995 ATX. It seems as though it likes to stall in hot and humid weather. Sometimes it happens along the highway and sometimes it'll happen when I come to a stoplight and I'm sitting in traffic. The rpms will drop slightly, then a little more, then the car will stall completely. I can restart the car, but the RPMs will drop again and stall. If I let the car sit for a little while and put in some fuel treatment then refill with premium gas, the car will run fine afterwards. The mods I have are a conical filter in the engine bay, and new mufflers. Anybody have any advice? I brought it to the dealer and they said they ran some codes and found a sporadic O2 sensor and have an IAC problem in history, but they said it was working fine then... They said the only thing they could do was run codes when it actually happens. Anybody had this problem before or know what my problem may be?

Thanks!

 

[SHO#7]

I no longer have a Gen II, but when I did... I had an oxygen sensor cause a similar condition. They are not hard to change, and fairly inexpensive. I would also pull off that idle air control valve and clean it out. If I remember, it is just on the other side of the throttle body. Hope this helps. Good luck.

 

[sdpatt]

An errant O2 sensor would cause a CE light and set a code. Probably not the cause. The conical filter is letting the engine ingest very hot underhood air. Is the air charge temperature (ACT) sensor installed in the inlet air stream? You are probably losing horsepower with that filter setup.

You may want to also try resetting the idle speed program.

 

[projectSHO89]

Next time it dies, loosens/remove the gas cap. Listen to see if you hear a big "Whoosh" of air rushing into the tank. If you do, replace your gas cap.

Steve

 

[HopefulSHO]

Ehh...O2's wont do that to ya. They'll just throw a code and skew your fuel mixture a bit.

I had a similar problem when the fuel pump started going out in my old Mustang & my current SHO. Although, my RPMs didnt slowly drop..the cars just up & died! But it would start just a bit later, and someitmes stall again.

 

[SHO--ripper]

I agree with you hopefulsho. a bad fuel pump did that to me. It did throw a code though. Check your fuel pressure.

 

[fred79]

I am having a some what similar problem in that It will stall randomly and only start after 10min. or so I pulled a secondary fuel pump circut error and a PIP error efery one told me it was the CPS could it be the fuel pump instead. some times after it happens its is hard to hear the fuel pump prime up after keying on the car. would it for shore show in the fuel pressure cause that is a relatively easy check.