Last post on Jul 24, 2012 at 7:23 AM
You are in the Pontiac Grand Prix
What is this discussion about?
Pontiac Grand Prix, Auto Repair, Sedan
#15 of 41 1998 Grand Prix SE 3.1 Question. Idle problems
Oct 06, 2009 (10:48 pm)
Hello everyone. First off, thanks for taking the time to read my post.
I have recently bought a 1998 Pontiac Grand Prix SE 3.1 for $600.
When I purchased it, it had the Low Coolant light on, and check engine light on.
I knew right off the go what the coolant light was. Damage to the intake manifold gasket due to the DexCool that was in the cooling system. I had that replaced. The Low Coolant light is still blinking, I'm thinking it is a bad sensor because I had also just replaced the radiator cap and upper hose, no further leaks are found in a pressure test. Oil was changed when intake was replaced as to get out all the coolant/water from the engine oil. This is not my main problem.
The main problem is the car has a somewhat of a rough idle. More now than before.When you start the car (It starts fine by the way) the RPMs fluctuate from 500 RPM - 1000 RPM. It doesn't die out, but sounds sluggish. It is fine while moving, and when it slows back down to idle, it fluctuates only minorly.
The Check Engine light I am getting is for a Camshaft Positioning Sensor.
I know where it is, and how to change it. But, would this be the reason of why it is acting so strangely?
#16 of 41 Re: 1998 Grand Prix SE 3.1 Question. Idle problems [esone]
Oct 30, 2009 (3:22 pm)
Yes, a faulty camshaft position sensor will cause engine to run erratic, eventually it will cause the engine to not start.
I am in the process of replacing the head gaskets on mine but dont know the head bolt torque settings, can you help?
#17 of 41 1998 pontiac grand prix se 3.1 v6 automatic
Apr 28, 2010 (11:34 am)
have broken shift cable that goes from the steering coluim to the transmission. cant find an replacement cable new used or after market. Any ideas?
#19 of 41 96 Grand Prix will turn but not start
Jun 27, 2010 (8:47 am)
#20 of 41 96 Grand Prix will turn but not start
May 22, 2010 (4:05 pm)
Okay, I know there are probably several discussions regarding starting issues here. But here is my situation. My 96 Grand Prix Coupe will turn over but does not start. My wife was the last one to attempt starting it. She said that the Battery light came on. So I charged the battery. Attempted another restart and still same situation. Now my Fuel gauge reads full yet I just added about 2.5 gallons of fuel to the car. Still will not start. Anyone have any suggestions as to the problem? Is it a fuse? Pump? Crank sensor? Would any of these things cause the fuel gauge to read full?
#21 of 41 92 grand prix will start but won't stay running
Jun 09, 2010 (10:01 am)
i have a 92 grand prix. i have replaced so many things over the last few years including: timing chain, the housing, the gears, spark plugs and wires, alternator, starter, a helio coil for the spark plug. but what i am trying to get at is this, after my timing chain broke and had it repaired, the car won't idle unless you have your foot on the gas pedal. it will start no prob but won't stay running. does anyone know why this is? is it something internally wrong with the motor? is it something i can fix easily?
#22 of 41 97 pontiac gran prix
Jun 27, 2010 (8:47 am)
i have a starting issue as well...my car ran rough for a while like a few days wouldnt stay running in idle. this morning i went out and it wont start at all...could be so many things wrong...where do i start?
#23 of 41 97 Grand Prix 3.8 not shifting out of 2nd until 45 mph
Jul 01, 2010 (8:30 am)
#24 of 41 97 Grand Prix 3.8 not shifting out of 2nd until 45 mph
Apr 01, 2010 (7:36 am)
My 97 Grand prix GT, auto, will not shift out of 2nd until I reach 45 mph. It does not have the sport shift button(option), standard 4 spd auto. I get down to 38 or so and it goes back into 2nd. The fluid level is good and the fluid looks good. I have no other issue with the trans. I have owned the car now for about 6 months and it"s done it since i bought it. I dont know if the filter has ever been changed. I'm thinking so since the car has 263954 miles on it. It still runs strong and doesn"t use much oil (engine). Could this be a pcm issue or maybe just needing a new filter.