Question about Pontiac Grand Prix
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Posted on Jan 02, 2017
Sounds like you're in limp mode. The transmission will do this when it has a problem that higher RPM might make worse - it's a protective feature meant to tell you that there's something signficantly wrong with the car. If it's a 96 or newer, go to AutoZone and have them scan for chassis/drivetrain codes - they should be able to do this (they can scan ECU codes easily), and it's free. If they can't do it, go to a shop and have it done, although you'll have to pay them to do it. They can tell you what's wrong. Until you have some codes to research, your best bet is to drive the car as little as possible so that whatever problem you have does not get worse. It could be low on fluid, or it could be about to die, but without the codes that are stored in the computer, which tripped the transmission light, we can't begin to help you sort out the problem.
Posted on Aug 02, 2008
I had a similar problem and resolved it by replacing the mass airflow sensor. Ive got 235k+ miles on my 1992 Maxima SE.
Still runs good but having problems with the alarm system.
Posted on Feb 24, 2009
well, the timing on your ram is computer controlled. is the truck in drive when this mis-fire occurs? or at idle? youve addressed part of your ignition w/the cap-rotor-plug wires. did you examine the old cap for carbon tracking? did you install the rotor properly? i know on my '97 ram the dist is feakin' buried in the engine it would be easy to rotate the rotor while installing/removing it so the timing mark is off. does your engine have the right plugs installed? your plug wires follow the correct firing order with your dist? you did not mention anything about your ignition coil. here is how to safely remove and check your ignition coil. disconnect battery-at the coil disconnect the lead wire (TOP) and primary (BOTTOM) from the coil. label your wires, or take a pic of your ign coil before you remove it so if you forget where the wires go, you have reference point. remove mounting screws and remove coil. clean coil to remove rust/dirt and wipe coil terminals off. inspect case for damage. with a multi-meter, check coil primary resistance by selecting ohm's and then place + and - leads on the pos/neg terminals on the coil, dodge used 2 brands of coils either a "diamond" or a "denso" primary resistance for the diamond mfr'd coil will be between 0.97-1.18 ohms. secondary resistance 11,300-15,300 ohms. Denso primary resistance 0.95-1.20 secondary resistance of 11,300-13,300 ohms. to measure secondary resistance place one of the leads to one the primary terminals and the other lead attatch to the large center terminal. compare your readings to the above values. if your readings are not within range of the above values, your problem is the ignition coil. other causes you may consider is faulty: speed sensor, throttle pos sensor/trans issues like bad pressure solenoid (actuates gear changes) a fault in your overdrive system. hope i have helped!
Posted on Feb 27, 2009
Your trans is slipping, u are going to need to have it checked out at a trans shop, they will test drive it in most cases for free and report what they think is wrong or recommend more diagnostic work if they are unsure..
Posted on May 21, 2009
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