Question about Pontiac Grand Prix

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2001 grand prix gtp rpm flucuating

2001 Grand Prix GTP 3.8L Supercharged. The rpms will start to flucuate around 40-50 just driving on a flat road no uphill. Rpms will go back and forth between 1500 -2000 the car knocks a little back and forth when this is happening (I use Shell V Power so i dont think its the gas?) and the car seems like it will turn off, but nothing happens i just speed up and the problem goes away. I scan for codes almost everyday nothing pops up. At first i thought it was my TBS Sensor, replaced it with a new one and that didnt help any. Did a tune up 2 weeks ago. This problem doesnt occur everytime i drive probably like 3/5 of the time I drive my car. Ive read that it might be my MAF sensor. But i dont want to waste $150 on the sensor and that's not the problem. Thank you.

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  • Gilberto Feb 24, 2012

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  • Pontiac Master
  • 975 Answers

Try this,pull the maf out ,if you look there is a hot wire going across the tube(maybe 2),if it has any white crusty stuff on it ,just use some spray throttle body cleaner to clean it up,even if you can't see it ,try it anyway!
Cleaning the MAF should be a part of every tuneup

Posted on Feb 25, 2012

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

  • 176 Answers

SOURCE: Where is the egr valve on a 1999 pontiac grand

upper left side of engine, near throttle body

.

  1. Disconnect the electrical connector from the EGR valve.
  2. Remove the EGR valve retaining nuts
  3. Remove the EGR valve
  4. Remove the gasket from the EGR valve adapter .
INSTALLATION PROCEDURE
  1. Install a new gasket on the EGR adapter . NOTE: Refer to Fastener Notice in Cautions and Notices.
  2. Install the EGR valve and the retaining nuts . Tighten Tighten the nuts to 30 N.m (22 lb ft) .
  3. Connect the EGR valve electrical connector.


Posted on Jun 30, 2009

emissionwiz
  • 75030 Answers

SOURCE: 1997 grand prix gtp starter location

at rear bottom of engine, u must change it from the bottom. Make sure the battery is disconnected before u start work.

Posted on Jan 15, 2009

KCGTODAD
  • 169 Answers

SOURCE: 1997 grand prix gtp. Tire pressure/abs light

Hello! This indicates a fault with the wheel speed sensor/ABS sensor. Any major auto parts retailer can pull the details of this code (which sensor) for free, which will help you identify if the wiring is loose or damaged or if the sensor will need to be replaced. If you need to replace the sensor - you will need to replace the entire wheel bearing assembly, as the sensor is internal.


Thanks for using FixYa!

Posted on Nov 02, 2009

  • 617 Answers

SOURCE: Location of mass air flow sensor, 2000 Grand Prix GTP

3.1 or 3.8 motor, mass air flow is in the fresh air (goes from air cleaner to engine)

Posted on Feb 07, 2010

mlapres
  • 757 Answers

SOURCE: replace thermostat on 2003 grand prix gtp with

The thermostat housing is located in the upper radiator hose. You will see a metal elbow secured by two bolts into what I remember is the upper intake manifold...don't quote me on that but you will see it regardless of whatever I call it. Anyways, GM decided it was a good idea to put stainless steel bolts in there but that makes it easy to strip the threads in the bolt hole so I think it's best when you put your wrench on the bolt to just tap on the handle till you vibrate it loose, then turn it.
When you pull off the housing you'll lose a little coolant and it will create an air pocket which we'll address. It's a 50/50 chance that the thermostat housing gasket will either stick to the housing or the engine...it may be torn, cracked or flaking in either case clean both contact surfaces before you replace the gasket. I recommend an oil impregnated poly material gasket.
Note the position of the thermostat in the hole and place the new one in as such.
I recommend a 180 degree thermostat...stock is 195 but the GTP runs better with the 180.
Put on gasket and reinstall the hose/housing assembly, alternate from one bolt to the other so the housing mates flat and cannot cause a leak.
Next, fill the coolant overflow bottle to the "HOT" mark. If the bottle is dirty and hard to see just put a light on top of the bottle...GM didn't mark it very well so if it's not squeaky clean you can hardly see a damn thing.
*IMPORTANT** if your car still has Dexcool in it, DUMP IT. It will eventually destroy the motor.
If not...continue on. Start the car. Go back to the thermostat housing and place a rag on top of, and twist the peacock valve on top of it to let the air out until it starts to get coolant on the rag. Done.

Posted on Feb 27, 2010

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HERE is a great website that has a ton of very useful information, regarding this and many other Grand Prix topics.

Hope this helps and thanks for using FixYa!

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My 2000 Grand Prix GTP Supercharged was running fine but it shut off with a "check guages" warning. The gusges were fine and the car will start but it shuts off right away. The engine will stay running if...


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