: Interesting problem - highway stalling

08-11-07, 09:15 AM
My '99 Deville has been great, thus more of a lurker here than anything else.

An issue has just began and looking for help from the experts.

At highway speeds (70-80), fast slow down to an exit, take a right
off the highway onto the ramp, and the car stalls.

I'm only seeing one dummy light on the dash - looks like the oil light.

I'm leaning towards some sort of a protective measure that shuts
the car down in case of sudden oil loss ? When I turn all the oil leans
to one side (the left) and the engine shuts down.

Oil level is full, one family car - my father-in-law for the first 50k,
me for the next 43k (we're both obsessive types) so the maintenance
has been done on time.

Am I on the right track ?



'99 Deville - daily driver
'94 Impala SS - keeps me busy

08-11-07, 01:31 PM
Nope, way off track. The Northstar was designed to hold 7.5 qts of oil. The reason is so that with a 1g lateral force at WOT the engine will not starve for oil because of the pump pick up becoming uncovered. Now, fuel could be another story. If you where low on fuel and a tank baffle came loose, the fuel could slosh over to one side and the fuel pump sucks air. Rather common on early 90's Devilles with less than 1/4 tank.

08-12-07, 03:03 PM
Thanks Ranger...greatly appreciated.

Take care,


09-09-07, 12:53 AM
Happened again tonight, but now wont start up again. About 1/2 tank of fuel.
On highway, slowed and turned right towards the off ramp and the car stalls.
Luckily the tow truck didn't stall on the way home.

Any ideas - fuel filter, fuel pump, sensor ?

Any help would be greatly appreciated.

Thanks and take care,


'99 Deville - daily
'94 Impala SS - weekends

09-09-07, 11:15 AM
Maybe an intermittent fuel pump. Start by making sure the fuel pump runs for 2 seconds at key on. If so, check the fuel pressure.

09-20-07, 01:25 PM
I had the same sort of problem with me 01 DTS. It sometimes would die coming to a stop once it stalled while I was driving. Checked the codes and it was a faulty crank sensor. I bought 2 new ones on Ebay for $40 and all is fine now. There are a few posts regarding these sensors you might want to check out. hope this helps. Frank