SPONSORED LINKS

1990 Pontiac Grand Prix engine stalls

Tiny
HAYLUCKMANME
  • MEMBER
  • 1990 PONTIAC GRAND PRIX
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 117,636 MILES
Replaced radiator waterpump thermostat temp sensor throttle position sensor maf sensor idle air sensor plugs & wires fuel filter air filter changed oil & oil filter replaced all vacuum hoses fuel pressure checked & good. Check engine light was on b4 all this now it isnt & no trouble codes now. Car drives perfect for about 20 minutes then starts running rough & dies stalls will restart but idles rough & dies unless it sits for few hours then runs good for 20 & same thing. Very frustrated
SPONSORED LINKS
Monday, August 30th, 2010 AT 12:54 PM

8 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
Is your car losing coolant?
Was this
answer
helpful?
Yes
No
+1
Monday, August 30th, 2010 AT 12:58 PM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
Is your car losing coolant?
Any white smoke?
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Monday, August 30th, 2010 AT 12:58 PM
Tiny
HAYLUCKMANME
  • MEMBER
  • 5 POSTS
First of all the car had radiator leak so replaced it along with waterpump & thermostat. Car sat all winter & when we went to drive again the fuel was rusty color & fuel filter kept getting clogged so dropped tank to empty completely & replaced filter. A mechanic friend thinks it may be EGR valve?
Was this
answer
helpful?
Yes
No
Monday, August 30th, 2010 AT 2:09 PM
Tiny
HAYLUCKMANME
  • MEMBER
  • 5 POSTS
Im being told now that a lil white smoke when started
Was this
answer
helpful?
Yes
No
Monday, August 30th, 2010 AT 2:11 PM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
These engines are notorious for intake manifold gasket leaks and will suck coolant into the combustion chamber and both consume coolant and cause misfires.
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Monday, August 30th, 2010 AT 2:28 PM
Tiny
HAYLUCKMANME
  • MEMBER
  • 5 POSTS
Yeah I know about intake gaskets on my 96 grandam but it did overheat & antifreeze was mixing n2 oil but this car hasnt ever ran hot the oil looks good & no coolant loss. How would we know if its the intake gaskets 4sure? Other than white smoke which is only when 1st started & coolant loss which we r not noticing any?
Was this
answer
helpful?
Yes
No
Tuesday, August 31st, 2010 AT 7:57 PM
Tiny
HAYLUCKMANME
  • MEMBER
  • 5 POSTS
Intake manifold gaskets? The car runs perfect until it reaches normal temperature then it dies or idles real rough when u go to give it gas tryn to rev it up it does opposite & kills it.
Was this
answer
helpful?
Yes
No
Wednesday, September 1st, 2010 AT 1:47 PM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
Your going to have to use a scan tool to diagnose it. You need to look at all the sensor data when the problem occurs so you can see what's out of spec at the time.
Was this
answer
helpful?
Yes
No
Wednesday, September 1st, 2010 AT 1:57 PM

Please login or register to post a reply.

Related Engine Stall While Driving Content

Is it Safe to Drive Check Engine Light?
VIDEO
Is it Safe to Drive Check Engine Light?
Instructional repair video
Engine Stalls While Driving
GUIDE
Engine Stalls While Driving
An engine that stalls while driving and then starts back up again, either immediately or after a short time is different from an engine that just wont start or if the...
VIEW MORE

Sponsored links