Car dies with heat soak

[rob350]

If I am in stop in go traffic or let the car idle on the driveway for awhile, it will start cutting out and die. I am not able to restart it until it cools off for a bit. I have no problems when im going down the road at crusing speed. I changed the MAF, ignition module, crank sensor and that didnt fix it. I unplugged the cam sensor while it was running, making it run in batch fire mode, and it still died when heat soaked. Any ideas?

Rob

 

[rob350]

Found something! The fuel pressure drops as it warms up. Drops to almost 0 at a hot idle. Bad pump?

 

[Blacktop87]

Hmmm....I'm having the same troubles as you are, even tho I have a 87. I changed to 160*stat, fbody radiator (hope I didnt knock the cam sensor or anything) and when its heat soaked (sitting after engine and fan are off with temps getting to 190 still) its hard to restart it, but when I do get it started it dies. No chugging, trying to catch itself or nothing. I'm hoping its the Ign. Module and not the fuel pump.

Have you started to replace anything else other than what's listed? I guess I'll check the fuel pressure later on today when it cools down and start from there.

 

[turbobob924]

heat soak

I have same issues with my hybrid.

In my case I think it is the coilpack and module gettigh too hot and crapping out. After it sits for 15 minutes it stars right up.

I plan on better wrapping my DP and silicone spraying it with DEI wrap and spray.

 

[Donniejr81]

I would look in the direction of the Ign Module. Sounds alot like a bad/going bad module with what you are describing. As far as your fuel pressure issue, I've seen partially plugged fuel filters do OK until they run a bit, then the sediment works its way up in the element, and settles back down after you let it sit a bit.

 

[G-Force]

I went throught his same exact issue with my 87 and it drive me nuts. Finally with the advice from this board I walked with a spray bottle and sprayed one item at a time to determine which one is the culprit. Turned out to be the cam sensor cap(not the drive only the cap) was getting heat soak. Bought a new cap and it never happened again. My cam sensor is the original from 87. This may or may not be your problem but from what I read it is closely related to what I went tru. Good Luck.

 

[garyk1970]

my car died yesturday, bad fuel pump getting hot....

 

[rob350]

turned out to be my less than a year old walbro....