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Recent content by Lifespeed

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    loud chuffing sound under boost, power loss

    Lately I've been hearing a loud chuffing sound under heavy boost, which seems to coincide with the engine falling on it's face a little. Then the sound quiets, and the engine comes roaring back, followed by a repeat of the cycle - chuffing and falling on it's face. At first I thought this was...
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    engine and trans mount replacement difficulty

    How hard is it to replace the lower engine and transmission mounts. It looks like there are only two, not counting the dog bones from the top of the engine to the radiator support. The dogbones have already been replaced, and they did help. The car buzzes at an idle, and it feels like the...
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    exhaust leak source, repair difficulty?

    My son has a 2001 GTP which has received a lot of maintenance, so it runs and drives well. It has had an exhaust leak for a while, but when I drove it today I noticed it has gotten pretty bad. Also the lower motor and transmission mounts have to be shot at 182K miles, although the upper dog...
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    Seat covers availability - OEM or aftermarket, 2001 GTP?

    My son and I have maintained his old 2001 GTP in order to keep it alive for his college years, so easily another 4 years as this is his first semester. While the car is very good mechanically thanks to the venerable 3.8L Buick and rebuild/replacement of anything that needs attention, the...
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    12V electric power failure

    The 2001 GTP wouldn't start. The electrical system appears to be completely dead, but the battery is at 12.6V. When I probed the large positive wire on top of the fuse box behind the battery it reads 5V, but the reading is unstable. I haven't been able to find the schematic in the manual yet...
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    brake caliper bracket, new or re-bushed (reman)?

    The caliper bracket on my 2001 GTP feels very loose in the guide pin bores. It doesn't just slide in and out as a floating caliper should, it rocks excessively as though the bores in the caliper bracket for the guide pins are worn out. Of course the guide pins are fine. The calipers are NAPA...
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    driveability, engine cutting out - help diagnose

    My son got the 2001 GTP hand-me-down. We just finished some maintenance with a new crank sensor, (CKP) harmonic balancer, water pump, supercharger isolator and belts. We did this maintenance because it died and wouldn't immediately restart. When it did restart, it would run smoothly, then the...
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    Harmonic balancer installation, tool and thread size for crank bolt

    I need to install a new harmonic balancer after replacing the crank position sensor, water pump and supercharger isolator. I know the hack mechanic method of using the old crankshaft bolt (I have a new one also due to torque-to-yield) is verboten on nearly all engines as it can damage the...
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    help diagnose engine dying

    I have a 2001 GTP that just started stumbling and dying. When it runs it is smooth, but then it will just die and not start. Let it sit for a while and it will start and run, although sitting there watching it I see it occasionally stumble and almost die. Up until now it has run fine and...
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    Sold springs, SSC lowering, one year old 6K miles

    These springs are only one year old with 6K miles. My understanding is these are the right spring to lower your car without going overboard. I bought them installed on some struts, but did not want to lower the car. I'll let them go for $50 for all four, you pay shipping from 95136.
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    help me choose struts and springs 2001 Grand Prix GTP

    I've done some suspension (and other) work on this car, but the tires are wearing badly. All 4 tie rods, sway bars (large GPP models) and end links have been replaced within the past 10K miles. Struts are the Koni red adjustable inserts that required re-using and modifying the old strut body...
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    radiator replacement difficulty

    It looks like I have a leak in the vicinity of the driver's side radiator tank below the upper radiator hose. The engine got up to 240F for about 5 minutes before I noticed, although I don't think the engine has been damaged. I am debating hiring a shop to replace the radiator vs doing it...
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    help with rear Koni red adjustment mechanism

    I was fortunate enough to get this low-priced good performing car with Koni shocks already installed. The fronts just needed one click more damping to really improve the ride. I'm going to fix the loose steering rack or tie rods soon. The rears have a different appearing mechanism than the...
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    banging from right rear suspension over bumps

    I guess I am assuming the banging is coming from the suspension. The car (2001 GTP) has Koni struts on it with about 80K miles, 160K miles on the car. The front suspension has had the tie rods replace, I don't know that the rear has had anything done but the struts. Any suggestions what to...
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    good aftermarket headlight housings

    At the risk of posting an oxymoron, are there any good aftermarket headlight housings for my 2001 Grand Prix GTP? The stockers are like candles in a bucket with the yellowed plastic. Will probably combine these with Philips extreme vision halogens. Not really looking to do HID or LED. edit...
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