Why does my 1999 GTP engine keep sputtering?

My 1999 GTP experienced the sputtering problem at 28,000 miles and it was the result of a defective wiring harness. I assume this to be very unusual but it can be the cause. Best of luck. 30 people found this helpful.

Where to get help for a Pontiac problem?

10 people found this helpful. For all you PONTIAC folks,Google pontiac problems,you will be sent to a Grand Am site,heck im even on their.lots of great info on pontiacs.a lot of guys their really know their stuff about theses cars. 31 people found this helpful.

What kind of engine does a 06 GP have?

I have an 06 gp base sedan 3.8 v6. @106000 we changed the trans filter ,every 3000 since we owned the car oil was changed.it suptters @30 mph to 70 mph we lost a price from the injector clip ….got a new harness …never a problem again. 9 people found this helpful.

Why is my car sputtering and losing power?

After changing spark plugs, coils and coil wiring, fuel lines and carrying out test to the fuel pump, relays and cleaning earth masses the problem continued.

Why does my car sputter when I drive?

Dear PoppaQ– I could list 25 reasons why your car is sputtering while driving, but let’s start with the most simple solutions first. It may be your fuel injectors. Buy some fuel injector cleaner at a parts store. Run a tank of gas with that and see what happens. I would also check my airfilter.

Why does my 2000 Sunfire engine keep sputtering?

Same problems with 2000 sunfire replaced all the usual suspects plugs wires,tps,coils,idle sensor turned out to be ignition control module was gone once i replaced the module check engine light went off the car worked fine ever since. 3 people found this helpful.

What to do when your engine is sputtering and losing power?

Be sure to check the rubber boot connectors for the vacuum where it connects to fuel pressure regulator and at throttle body and trans. Mine were all cracked and leaking and not obvious. All of the damage was on the bottom out of sight. I moved them and there it was. Replaced them and problem solved.

What causes engine to sputter at 30 mph?

These trucks are notorious for bad ignition coils. They don’t always set a code either, it depends on several factors. To check these out in my shop there is a mode in our scan tool called “mode 6”. This allows us to look at certain engine data parameters to look at misfire to locate the offending cylinder (s).

What to do if your car engine is sputtering?

The seals and gaskets prevent exhaust gases and oil from finding their way to the combustion chambers. When these fail, you will start experiencing a sputtering engine. Further seal damage will eventually lead to the complete destruction of the exhaust manifold. The solution to this is to simply replace the seals and gasket if you find any leaks.

What’s the RPM on a Pontiac Grand Am?

The vehicle tops out at around 55-60 MPH. If I try to press any harder on the accelerator at this point, the RPM once again kicks up 3,000-3,500. In addition, when I do this, the vehicle will lose speed and drop to around 50 MPH. To obtain a constant speed of around 55 MPH, the vehicle is running a constant 2,500 RPM. Not sure what the issue is.

Is the car engine still sputtering and shaking?

The same sputtering and shaking that you report. My engine had only 28,000 miles on it at that time and now has 122,518 miles and runs smoothly and produces a bunch of power. I still enjoy owning it. 31 people found this helpful.

Are there any problems with the 2008 Pontiac G6?

The contact owns a 2008 Pontiac G6. The contact stated that the traction control, check engine, and tire warning indicators illuminated. The vehicle also experienced violent shaking. An independent mechanic diagnosed that the brakes were severely corroded.

What kind of engine does a Pontiac G6 have?

I have a 2008 Pontiac G6 with the 2.4L 4cyl engine. Has anyone else encountered a problem when they start their engine and the motor sounds like no oil is going through it (sounds like very loud lifter tick)?

When was the last time I serviced my Pontiac G6?

Last serviced at 126,398 miles in Wilkes Barre, PA on 06/07/21 • Vehicle serviced • Vehicle washed/detailed. Mileage: 126,527 miles Body Type: Sedan Color: Gray Engine: 6 Cyl 3.5 L Accident reported. Purchased on 08/27/08 and owned in IN until 06/11/21. Driven an estimated 12,278 miles/year.

Why does my 2005 Pontiac G6 not start?

2005 Pontiac G6…Started vehicle after being locked for the day, would not allow to shift out of park, with brake depressed, or at all, unable to even depress the button on the shifter. Security padlock no longer blinks on the panel, lit solid yellow, maybe security engaged. Unhooked battery, reconnected, tried to start, now it won’t even start.

Why does my car not go over 2K rpm?

In drive won’t go over 30mph & if rpms get to 2k sputters loses power badly. Replaced, IAC,tps, plugs, wires, throttle body, catalytic converter, ignition module, coil packs, fuel pump,filter. It’s like it’s in limp mode. Any help will be appreciated. My car has 140230 miles. My car has an automatic transmission. My car has 140988 miles.

How does traction control work in a Grand Prix?

The anti-lock braking system (ABS) and Traction Control systems in your Grand Prix both use the ABS wheel-speed sensors and modulator valve assembly to control wheel slip. The ABS system monitors the wheel-speed sensors and relieves brake pressure on a wheel that it senses is nearing lock-up.

How to troubleshoot a Grand Prix ABS light and traction?

Go to step two if the code indicates a wheel speed sensor fault or step five if the codes indicates a solenoid fault. Select “Data” from the onscreen menu and scroll through the list until wheel speed sensor data is displayed on the screen. Test drive the car while monitoring the wheel speed signals, indicated by the fault code, on the scan tool.

What causes wheel lock up on Grand Prix?

Check the tires for proper wheel size and check the fluid level in master cylinder. Improper tire size, such as two different sizes, will cause the wheels to turn at different speeds and may set a false code when the computer senses this as potential wheel lock-up.

What causes a car engine to lose power?

MAF sensor. when that goes, the computer doesn’t know how much fuel to put into the engine so it repeatedly switches from too rich, to too lean causing the engine to run like garbage while trying to maintain a steady rpm, and have insufficient power under accelleration. 42 people found this helpful.

Where is the fuse box on a Pontiac Grand Prix?

Fuse box is locate on the end of the instrument panel on the passenger side. The underhood fuse block is located on the passenger’s side of the vehicle in the engine compartment. WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.

Why does my car stutter on the freeway?

While traveling home on the freeway at 65mph the engine began to stutter, especially when trying to go up any type of grade. I slowed down to 50mph before the “stutter” went away. I had a similar problem while traveling in Florida.

What kind of engine does a 2007 Grand Prix have?

Used 2007 Pontiac Grand Prix Engine The Grand Prix offers three very good powerplants. The base car’s 3.8-liter engine has plenty of low-end torque to allow for speedy intersection crossings.

Is the Pontiac Grand Prix GXP a good car?

Best car ever… I can’t say enough about my 2006 Pontiac Grand Prix GXP-I found this car at 38,325 miles in Dec 2015. I soon realized that is wasn’t even broken in yet. From the power to the handling to the style and especially the look it has not been disappointing.

What’s the name of the new Pontiac Grand Prix?

A tire pressure monitoring system becomes standard on all trim levels. With the demise of the Bonneville, the Grand Prix becomes Pontiac’s largest and most sophisticated sedan.

After changing spark plugs, coils and coil wiring, fuel lines and carrying out test to the fuel pump, relays and cleaning earth masses the problem continued.

Driving should be smooth. But, if you are driving and your car’s engine starts sputtering the first cause of concern would be low fuel. However, if your fuel gauge is full it could be a symptom of further engine problems. A blocked fuel injector can prevent fuel from reaching the combustion chambers.

What are the symptoms of a bad throttle position sensor?

A faulty throttle position sensor sends incorrect information to the ECM resulting in various issues in the engine, its performance, and fuel economy. Below are common symptoms of a faulty TPS. In most of the cases, all of these symptoms will show together making it easier to detect the faulty component. 1) Car Jerks

Why does my car Jerk when I slow down?

If the car sat for a year with fuel in the gas tank, that fuel has oxidized and created gum, varnish and other solid contaminants that have plugged up the fuel filter and the fuel injectors. The fuel filter is… After replacing valve cover gaskets, car runs horrible, and throws 5 different codes.

What causes the engine to dump extra fuel?

If throttle body is cleaned, can it cause “unmetered air” to enter the intake manifold and disturb the fuel mixture, and as a result the ECU will dump extra fuel into the air-fuel-mix ? Spark plugs are Irridium type mentioned life 80,000-120,000 km. Can the high fuel comsumtion ruin the spark plugs just after 50,000 kms ?

How is the gas pedal connected to the throttle body?

Many car makers including GM started installing fly by wire electronic throttle bodies. In those vehicles, the “gas” pedal isn’t connected to the throttle body by a cable. The pedal simply provides an electronic signal, telling the throttle body how much acceleration you’re requesting.

What causes a car to stall when the torque converter fails?

Vincent Ciulla is a certified master automotive technician who has diagnosed and repaired light trucks, domestic and foreign cars, and diesel engines, for more than three decades. A common problem on many General Motors cars is the Torque Converter Clutch fails to release and causes the car to stall when it comes to a stop.

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