1997 Cavalier 2.4 stalls when warm

[shakewell]

My 97 Cavalier 2.4 is stalling intermittently and only seems to happen when warm. I haven't been able to diagnose it at the moment that it actually happenning so it's been just a frustrating problem.

Here's what I know:
no codes
plugs are ok
coil pack housing is new
fuel pressure reg is new
no obvious signs of overheating from coil packs


When it stalls, it will start right back up and idle decent. If I give it any throttle, it will almost kill and sometimes will. If I get the rpm up high enough I can make it through an intersection but that's it. Any help would be great!

[shakewell]

I am probably going to try 2 new coils tomorrow. I'll see what happens. I have access to a known good used ign module but I want to isolate the prob and not just throw parts at this. Any experience or help will be appreciated.

Thanks.

[shakewell]

Tried brand new ignition module - no difference. Also tried today to check fuel pressure (maybe pump is starting to go out?) but alas, the only place I can see to hook up a guage is at the filter.

Anyone have any suggestions?

[shakewell]

Started acting up today again and thankfully I got a scan tool hooked up while it was doing it. Nothing was out of sorts about the data but while I was messing with the throttle trying to watch the sensors, my MIL finally lit up. Code 121. So I replaced the TPS and will see what happens.

By now I realize no one is offerring help but at least I can look back to my posts and see when/what I've done so far.

[muff34]

Originally Posted by shakewell

Started acting up today again and thankfully I got a scan tool hooked up while it was doing it. Nothing was out of sorts about the data but while I was messing with the throttle trying to watch the sensors, my MIL finally lit up. Code 121. So I replaced the TPS and will see what happens.

By now I realize no one is offerring help but at least I can look back to my posts and see when/what I've done so far.

Ha Ha HA well at least you have a sense of humor about your situation . Did you check your catalytic converter to see if it`s plugged. sorry can`t offer anything else ,other than as you say fuel pump going south. Good luck and do hope you let us know how you make out ................ just incase you want to re-read your posts in a couple of moths to remind yourself ......LOL

[shakewell]

I didnt check the converter but I am doubting that is the problem. If it was the cat, it chould: set a cat inefficiency code, have poor acceleration and rough running most of the time. This problem comes out of nowhere.

It crapped out on me again today so the TPS wasn't the problem. I put it up in the air and hooked a fuel pressure guage at the filter - good pressure, but wouldn't act up for me. Even after running for 1.5 hr the darn thing wouldn't stall. So anyway, before I gave up and unhooked the guage I went ahead and replaced the filter to rule it out.

Will see what happens...