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V6-3.8L Turbo

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When I accelerate, my car hesitates, the rpms bounce, and sometimes i have a missfire flashing CEL
Hello and thank you for your question. With having your engine with bank 1 being lean (lack of fuel), the symptoms are showing that there is a problem with fuel delivery or excessive heat. If the EGR valve was to...
Question
Starting issues
Hey there. Thanks for writing in about your 2005 Pontiac Grand Prix. There are many possible causes for a car not to start. Based on your description, however, I believe there is something wrong with your ignition system. I would...
Question
Car won't start. Battery, starter & fuses ok. Suspect relay behind dash is there an easy way to access this relay?
The starter relay is located under the driver side speaker in the dash, mounted to the firewall. It may be possible to remove the speaker and reach the relay. If you are not comfortable with the repair or would like...
Question
I want to take the speed governor off
Hey there! You would need to get one of those aftermarket computer re-programmers to set the computer cut out speed and RPM limit. You would also be able to change tire sizes and change performance to give you more power...
Question
I'm smelling antifreeze an seeing a little steam from under the hood
The engine in your Pontiac Grand Prix is known to corrode out at the corners of the intake and head. The leak starts with a gasket and grows to damage the intake and heads. I suggest removing the intake and...
Question
I'm having electrical problems, 1995 Buick Riviera
With so many electrical problems, I would start by checking the battery first. A poor or corroded connection here can cause a world of problems. Have the same technician hook jumper cables to the car and pull fault codes (if...
Question
Do I have to drop the tank or can I access it from the back seat to change the fuel pump thank you
You can access fuel pump by removing the access panel in the very front of the trunk by rear seat. if you find you are needing help with this repair, a certified technician from YourMechanic can come to your home...
Question
Car runs hotter than normal on express way
Hello. If the car is running hot at higher speeds, then that typically means it has a clogged radiator or a thermostat that is not fully opening. It can also be caused by a slightly leaking head gasket. I usually...
Question
Won't start - 2000 Pontiac Bonneville
Not likely. If the supercharger is not spinning, your motor will be greatly starved for air. The supercharger is a set of very large surface area gears that push more air into the motor at a rate higher than it...
Question
Cooling fans
This can be caused by a number of things such as low coolant levels, a faulty thermostat, or a failing coolant fan switch. As you may know the coolant fan switch helps to maintain the proper coolant temperature by turning...
Question
Transmission
Hello. From what you are describing it seems as though the transmission fluid has leaked out. There is a rubber hose that conveys transmission fluid to the radiator for cooling (through a sealed heat exchanger). That hose could have leaked....
Question
I think my cars transmission is going out
Hello. Grinding noises at high speeds could be related to wheel bearing or transmission issues. This type of problem may be difficult to diagnose without test driving the vehicle to determine whether or not it is worth fixing. A certified...
Question
Car only drives in reverse now
Hi, thanks for writing in. Most likely, the "forward apply band" has failed in your transmission. This failure will affect all forward gears as you are experiencing. This should be diagnosed by a reputable transmission shop who can confirm this...
Question
Headlights/Tailights/Turn Sights do not work
Hi there. It appears that you are not getting the right voltage to your lights. Most of the time this is caused by a failure in the multifunction switch. This is the switch that turns these off and on. I...
Question
When changing signal stalk do you have to disable air bag?
Hi there. On most vehicles, including your Pontiac Grand Prix, you'll have to remove the steering column and the air bag housing in order to replace the turn signal indicator. This is due to the fact that there are connecting...
Question
Car doesn't run right - 2005 Chevrolet Impala
Hello and thank you for contacting YourMechanic. You will need the check the idle air control valve (IAC). It is located just under the throttle body where the throttle plate is. Unplug the harness and check the plug for any...
Question
Misfire at hard thottle, rpms either dont go up when accelerating, or slowly drop as i accelerate
Hi - check your vehicle's fuel pressure when running, and under load. Your comment regarding "fuel trims ...erratic" gets my attention. If the pressure is not correct, check the fuel pump relay (possible burned contacts) and fuel pressure regulator. If...
Question
Loses power when reaches a certain speed limit sometimes it works sometimes it doesn't when it works cruise control works
Hey there. This may likely be related to a bad O2 sensor. As you may know, the O2 sensor monitors the oxygen content of the exhaust gases as they leave the catalytic converter to determine how much additional fuel to...
Question
My car dies while driving and now it won't even crank. The lights still come on though.
There seems to be a combination of problems going on with your vehicle. First thing to address is whether you want to keep the aftermarket remote start. If not, the ignition switch system needs to be restored. Bypassing the remote...
Question
Car makes one click and won't start
Generally, this type of clicking sound will be heard when the starter solenoid is bad or the battery is simply just too weak to turn the motor over to start. Since you just replaced the starter, it is likely that...

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