Grand Prix :: 2004 - Loud Clunk While Having The Car In Reverse And Power Braking It
Jun 7, 2013
In my 2004 Comp G I have an extremely loud clunk when braking. The braking clunk does not happen all the time. There is a clunk while having the car in reverse and power braking it. While holding down the brake and revving hard and fast it make the loud clunk every time. It will not do it all the time in drive though. I can not pin point which side it is coming from. It sounds as if it is mostly the right. It almost sounds as if it is coming from inside the trans near the pan area?
I have replaced the lower control arms, sway bar bushings, stab links, struts & mounts, I have solid engine and trans and top mounts, new inner and outer tie rods, all wheel bearings, etc.... (not for this issue, just for performance/wear).
I am torn between thinking it is a cv axle or internal drive train noise.
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I have a 2000 GP GTP. I went over a speed bump to fast one day, and parked my car. When I got back into the car the next morning, I tried to put my car into drive and it wouldn't accelerate or move. So I put it into lower gear, 1st to be specific, and the car moved normally. I drove like that for a few days with no problem. Then days later I did the same thing, went over a speed bump to fast and now the vehicle wont move at all unless I put it in reverse.
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It is the 2000 GTP 2 door. It is my sons car and is dead in front of my house. Changed the fuel filter as it is cheap to do. At the check valve there is no pressure in the fuel line. I turned it over with the hose off the filter it did not pump any fuel. I do hear a click or clunk in the gas tank when I turn it over suggesting it is getting power into the pump.
I almost went and bought a pump but do not really want to put the $230 + tax down without checking the resistor after reading around the net.
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I have a 97 Grand Prix GTP with 191,000+ miles. For the past couple of months, I have had a loud groaning sound coming from somewhere under the hood when I steer the car in either direction. This groaning is most noticeable at idle or very low speeds and when the car is first started up in the morning. It seems to get less noticeable at higher speeds and after the car has warmed up a while. Over the past few days, at idle/low speed and when cold, there is now more resistance when steering in either direction. Power steering pump or rack and pinion? (Hoping this is more PS pump than rack and pinion). The rack and pinion was replaced in 2009.
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Just changed the struts, control arms (both used) and sway bar links (new) in front and when braking or accelerating there is a clunk on the right side. Checked the bolt on the control arm and its tight.
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I have a 97 GTP. When I am at idle, I get a very loud rattling noise coming from the drive belt area of the engine. The noise goes away when you rev the engine up, but returns immediately when idling. I removed the supercharger belt assembly, and then noise still occurs. This just started tonight out of the blue, and It is extremely loud.
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When you are accelerating anywhere from half to full throttle it may cut out at any given time. The RPM will drop down, it may bounce up and down for a bit and recover, or it will drop all the way down and stall. If you let off the gas it may or may not recover. If it stalls so far from the tests I have done if you never shut the key off it will never restart again. If you shut the key off and wait from 5 to 10 minutes it will all of a sudden restart normally like nothing ever happened. If you try to restart it immediately even if you shut the key off and back on it will not start.
When it does not start when I am attempting to start: Fuel pressure according to my gauge is between 55 and 60 psi. Inline spark tester shows that it is getting a spark. Engine sounds normal while cranking so in other words compression sounds normal. I have an LED test light rigged up showing when an injector fires, and it does show electrical activity going to the injector when it opens (flashes). Only clue is that it SEEMS dimmer when it wont start, but I have no clue if thats how it normally is on start up. Its only a slight difference from the brightness of a normal idle brightness. I have a snap on scanner hooked up, nothing that I know of looks abnormal in the data and it will not throw codes when this happens.
Parts I have changed or cleaned so far: Changed the fuel filter, crank sensor, cam sensor, ignition module, and MAF sensor. Cleaned the throttle body. When the car is working normally it runs strong, good power, smooth. Starts great normally.
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2004 GTP. I have recently replaced the condenser, drier, compressor......
My issue is that my compressor only works when jumped. I checked the relay and 10 amp fuse located in the engine bay fuse box and both seem fine. I replaced the pressure switch and put a new pressure switch connector on it. I got it to take a full charge by jumping the compressor. It blows very cold when jumped. The outside temperature on the dash is reading correctly.
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I have a 2004 Grand Prix GT. What all the fuse under the hood labeled Battery Main 4 supplies power to. Both my HVAC fan and the HUD display won't work. What I should start checking.
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Just replaced power steering pressure hose while engine out as PM. New hose wasn't correct shape so I bent the tubing to fit. I later realized that I bought a hose for power steering without variable assist and the hose for variable assist looks correct.
Is there any harm in leaving the "w/o variable assist" hose in now?
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Ive got a 04 f350 that after u shift into 4hi or 4lo when u accelerate it it makes loud clunk noise in fwd or reverse hi or lo. With hubs unlocked it still clunks. Have checked, wheel bearings, axle U-joints, and driveshaft joints all good. So I am thinking I've got issues in t-case. Popped drain plug out and wow that dex merc 4 looks nasty. So thinking I need exploded view of transfer case.
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I have a 1998 Pontiac Grand Prix GTP and the AC just stopped working. The fan blows but i don't get any cold air. I have noticed the AC clutch plate does not move and the relay does not click when the ac is toggled. Long story short, I think I need a wiring diagram for the AC. Here is what I have checked/ruled out so far.
1. When I toggle the AC, the AC clutch relay does not click so i assume there is no power getting to the relay. (I have recently had other wiring issues so I'm guessing its the same case)
2. I swapped the AC clutch relay with the fog lap relay (they are the exact same relay) and the fog laps still worked so i know its not the relay.
3. I have checked the AC fuse and that is fine.
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I have encountered a problem with my car engine. I noticed the car was not putting out enough power. When I press on the gas pedal aka accelerator the car drives real slow or sluggish; it seems like there's something clogged. I recently replaced the alternator which was draining the car battery. Since then the car starts up without any problem. I assumed its the EGR valve. The original EGR valve was quite carboned up but the used one from the junk yard didn't do much justice to the problem.
Additionally, the car is rough idling which I believe was due to bad gasoline.
Catalytic converter was struck by curb and heat shield was damage. Everything seems to be intact!
2000 Pontiac Grand Prix SE 136km+
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I've been noticing when going in reverse and then braking, when then going forward and braking there is a clunk which seems to come from the front brakes. Is this normal? Shifting of the pads in the caliper?
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So I noticed my Treg makes a clunk when I break when backing up. If I hit the gas, then brake, 'clunk'. Sounds like its coming from the rear or undercarriage. Hopefully not serious but its going in for service soon.
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I have a 98 gp gt. I have no power going to the radio, sunroof, steering wheel controls, or power windows in the fuse panel I have virtually ripped this car apart and still no clue why I'm not getting power.
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I have a new car now, 2004 Grand Prix GTP Comp G, got it at 88k and it now has 167k. Nearly no problems other than routine maintenance, but here I am with an issue I can't seem to figure out.
A few weeks ago, I blew a tire on the highway, ended up getting 2 new tires put on the front and moved the fronts to the back. Tires were then rebalanced and the alignment straightened out.
The guys at the shop said the front tie end rod needed replaced, but I'm pretty sure they were trying to make extra money off a new customer because my bill was going from tires/alignment to tires/alignment, bearings, tie end rods, and speed sensors.
Now, on to my issue. When I'm driving on the interstate, I notice a humming sound that seems to come from the front passenger wheel between 68-80mph. Soon as I go over 80 or under 68, it's gone. I noticed that the noise lessened when I veered to the right, so I assumed it was the bearing.
Took the car to my usual shop, had the bearings checked, got the front driver bearing replaced under warranty. Mechanic said the passenger bearing seemed fine. Got it on the highway again today, noise is still there.
3.8SuperPacer
2004 Grand Prix GTP Comp G with Ram Air
1998 Grand Prix GTP 40th Anniversary Daytona 500 Pace Car Edition
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The engine cranks and turns over when I turn the key, but won't stay running unless I give it some gas. My mechanic doesn't know what's wrong with it, but I haven't starting having him replace parts. What's going wrong. Could it be the fuel filter? fuel pump?
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I noticed red fluid coming out of a line behind the radiator. The line runs directly into the bottom of the radiator. Is that line the lower pressure or high pressure power steering line?
2001 Pontiac Grand Prix, GT 3.8L
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My daughter has a 1995 Grand Prix - 3.1. The car has an intermittent problem that can go 2-3 weeks in between occurrences.
It runs like a top, but will suddenly lose power while driving and die completely. After a while it'll be fine. (starts up again.)
The lights will flicker and give a bit of warning before it dies. I had both crankshaft sensors replaced a month ago and I though that would do the trick.
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I get an audible 'clunk' whenever I brake while in reverse. The sound reminds me of my old 4X4 when I would back up to take it out of 4 wheel drive. I searched for some existing posts but didn't get the keywords right or they don't exist.
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