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2005 Series III Stalling after a hot run

05GPSJ

New member
Hello, I'm a new member. I have a 2005 GP base with a 3800 Series III engine. I currently has 79,000 miles had it 2 yrs. got with 58,000. I have noticed that first morning starts car starts fine, but when I got to the store, gas station or movies, etc. I go to start car after it's warmed up but it stalls out instantly, so I have to give the engine gas to get it to run. Sometimes the car is sluggish once I pull out of the parking space. Now I replaced the plugs 3 weeks ago. NOTE: (I noticed that cyc. #2, 5 had a hot spot on the plug but it wasn't to bad yet. According to a Haynes manuel I read for a different car the spark plug section stated this is a indication of 1.Timeing, or 2.Coolant issue, or 3.Wrong heat range of plug which the old plugs I removed were AC Delco's I installed NKS's.) This has not changed anything, but I noticed that on 2 different (times) days after I came home from work shut the car off the whole jerked forward which is odd. Could this be a timing issue with PCM or CPS (Crank Postion Sensor), TB issue?? I have read several topics and forums, and I am not sure what to try to repair or replace. It seems like everyone is pointing to PCM updates, CPS, or TB. Can this problem get worse?? Any suggestions? Everything is stock on this GP no K&N air filter.
 


Have you solved this problem? I also have the same issue. Does your car also run rough (studders) during load when this happens? (i.e. during acceleration on at highway speeds) I just bought my 05 GP GT 60k miles and I have had this problem the whole time.
Can anyone help us please :th_scratchhead:
 
I just had the same probelm with my 04 grand prix I changed the crank sensor, map sensor and the control module still the same probelm so I took it to the dealer and it turned out to be my fuel pump i was suprised becuase it wold start up and run fine later. It runs fine now
 
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