90 DEVILLE STALLING WHILE DRIVING
 

90 Cadillac DeVille with 4.5 L engine has started to stall intermittently while driving. Will happen at any time. Has happened while driving on the highway, or on entrance ramp to a highway, accelerating up a slight grade, turning a corner, etc. Occurred about 4 times over 15 miles. Gas tank was down to about 4 gal. level. Restarts immediately. I have not seen any check engine light come on with this problem, but I have occasionally seen code E30 (ISC rpm out of range). Any suggestions about possible causes or ways to analyze.

RE: 90 DEVILLE STALLING WHILE DRIVING
 

Do a search on this forum for "crank sensor". If I recall, the crankshaft position sensor will fail at times and happens so quickly the ECM cannt record it. Just a guess without a code? ISC out of range could be because the car stalls and the throttle is partially open. ISC only works when your foot is off the throttle.

RE: 90 DEVILLE STALLING WHILE DRIVING
 

Being condition only happens when 1/4 tank or less. Problem could be with sender or fuel pump pick up/strainer.

RE: 90 DEVILLE STALLING WHILE DRIVING
 

I agree. Rule out the fuel level by keeping it above a quarter tank for a week and report back.