I would like too discuss a strange problem with two Corvettes in my repair shop. A month ago, I received a 94 Corvette for Penn. State inspection. Part of the inspection, requires a test drive, to try and notice any driveability problems. Instantly, I noticed the brakes weren't stopping properly. I had good pedal, but the car would not stop when the brake was applied rather hard. I continued the test drive to make sure of the results, and there was no change in the stopping power. My gut feeling, was cheap brake pads had been installed resulting in very little coefficient of stopping power. Upon inspection, sure enought, someone had installed cheap Car Quest pads on the front and rear. I proceeded to install Raybestos best pads, front and rear, with new rotors all the way around. Well! the results were exactly the same, no stopping power. I covered all my bases dealing with the hydralic and mechanical system. A call too the Raybestos Tech service, discussing my problem, resulting in stumping the Techs. I was getting nowhere. Walked away frem the 94 to work on the 95 Corvette for a completely different problem, and low and behold, the test drive resulted in the same braking problem, the car didn't want to stop. The mileage on the 94 is 66,000 miles and on the 95 is 34,000 miles. I think the pads have been changed also on the 95. I keep coming back too the feeling that something is wrong with the disc pads. Maybe someone has had a similar problem, and could shed some lite on this stopping power problem.
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Re: Stoping Power
I had a new 94 and gawd thats scary, but it made me think back to those mechanical groans from behind the drivers seat when all that computer assisted stuff started entering the envelope in C4's. If the hardware is undeniably good, perhaps the software code for some part has burped or eraced. Wasn't ABS essentially run by code? I admit to ignorance of C4,5,6 stuff, other than catch and release. (Buy new/sell under warrany/letGMfix)
Geoffrey Coenen -
Re: Stoping Power
Through my job I have access to the GM online service manual. There's not a lot of detail. Here's what it says:
HIGH PEDAL EFFORT
FOLLOW SERVICE MANUAL DIAGNOSTIC PROCEDURES FOR THIS CONDITION. SERVICE ROTORS IF THEY HAVE BEEN RECENTLY RESURFACED. (THE SURFACE FINISH MAY BE OUT-OF-SPECIFICATIONComment
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Re: Stoping Power
Chuck
I have to wonder why you would go ahead and replace everything without checking for a bulliten or your service manual? I hope you are not going to do this to the other one!This is exactly why I avoid repair shops if I can. TomComment
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