Stalls when hot - 1992 Cadillac DeVille

Could be a bad ignition coil or the TFI module that controls the coils' circuits.

hot or cold engine or both?





which engine, to work on one, you need to know what it is

and what EFI system it uses. or its all just a crap shoot.

no new distributor cap and rotor why skip the full tune up,. why?



first questions.

1: can you save the stall with a a fast right foot.

2: why change out pump etc, if fuel pressure is at spec, a $20 tool would have saved you 5 hours hard labor and bath in fuel? why?





Stalls 101.:



the engine can stall for over 50 reasons are you going to do all 50?

surely not. why not consider diagnosis.. as a path.

1: car stalls, right foot saves it. and can drive fast if i keep foot busy.

a: ISC stuck closed.

b: EGR valve stuck open (depends on which engine options)

c: low compression on one or more cylinders.

2: can\'t save it from stalling (right foot)

a: fuel pressure is low. (wires bad.)

b: lost spark, for any reasons.

c: lost 12vdc to the EFI system( killing spark and fueling)



stalls.

hot or cold or both

stalls, can save it or not, hot and cold

hot restarts are easy and it runs good hot,yes./no.



there is lots more to it, then just stalls. lots more.

stalls. engine stalls. Stalls only HOT. and fails hot soaked.
stalls have 4 paths ?
1: lost DC power, to EFI (spark and fuel brains) "loose fuse?"
2: lost compression only hot (compression gauge to rescue)
3: lost spark or the classic, never doing 60k mile tuneups.
or the classic EGR stuck open , again not ever cleaned at 60k
4: bad fueling. (too much floods, it and stalls it, or tool lean it dies)
(or stuck closed ISC) we clean it at 60k with the EGR. as part of the 60k service points listed in the missing operators guide. (bet)

in that order, this 4 macro paths to , no stalls.
do you want me to guess which of 50 parts are bad.?
or do the 4 tests. to find which path it is.
one takes a month, other 1hr.

one more test. can you save this stall with a fast right foot?
Y/N?

and how easy was it to save, if true.

Your catalytic converter may need replacing. When they're hot the exhaust flow may be obstructive causing back pressure making the engine to sputter and stall.

The reason your car stalls out on hot days is probably a vapor barrier issue.

Vapor Lock in the carburettor - it gets so hot that the gasoline vaporizes and blocks the flow. Insulate it better.

Try a crank sensor. It's just above the oil pan center between the engine and transmission. Look and see if the old one is cracked.

Sounds like the tranny needs to be rebuilt. Like the pressure plate and the disk are worn

have ur fuel injectors checked

Does it start right back up after it stalls? make sure all conections are tight at fuel pump, sounds like it could be loosing ground at pump, or hot lead is loosing its connection at pump.Also fuel pump relay could be getting hot and quits working.