3.8 2002 Impala with 170K runs great, once it is warmed
#1
3.8 2002 Impala with 170K runs great, once it is warmed
We are the only owners of a 2002 Impala with a 3.8 engine. This care runs great once it is warmed up. This car burns on oil and we have been very religious about changing the oil and filter every 3k. a few years ago we got a check engine light and the dealer could not fix it. They thru every part available at it which I made them remove since it did not help. the problem is that the car stumbles very bad or just dies during cool weather or hot weather. I have changed the MAF sensor with one from the local parts store only to make thinks worse so i put the original back on after cleaning it with the correct cleaner. This is a good car other than keeping it running until it is warmed up.
#2
CF Monarch
We are the only owners of a 2002 Impala with a 3.8 engine. This care runs great once it is warmed up. This car burns on oil and we have been very religious about changing the oil and filter every 3k. a few years ago we got a check engine light and the dealer could not fix it. They thru every part available at it which I made them remove since it did not help. the problem is that the car stumbles very bad or just dies during cool weather or hot weather. I have changed the MAF sensor with one from the local parts store only to make thinks worse so i put the original back on after cleaning it with the correct cleaner. This is a good car other than keeping it running until it is warmed up.
Did the dealer give you the OBD II codes, when they tried to repair the vehicle?
#3
CF Senior Member
oilcanhenry makes a good point, any available codes would help figure this out. I wouldn't want to just throw parts at it either, but when I had my 2001 Impala, I remember having to change the spark plugs and the wire set when it was running poorly, also if I remember correctly I had one intermittent coil pack that made it run really bad.
How is the fuel pressure on the fuel rail? If it is not ok, could be a bad fuel pressure regulator or fuel pump. Those regulators are easy enough to change. When was the fuel filter replaced?
Looking at data with a OBD2 scanner would help too.
How is the fuel pressure on the fuel rail? If it is not ok, could be a bad fuel pressure regulator or fuel pump. Those regulators are easy enough to change. When was the fuel filter replaced?
Looking at data with a OBD2 scanner would help too.
Last edited by Frank3; April 17th, 2018 at 3:30 PM.