I've had my '87 GN for about three years now. It has run flawlessly save for a heater failure up to this point. Three weeks ago I drove it from New York to New Orleans and the problems have been coming in droves ever since.
First, after parking it in a lot one night, I drove it in the morning and it immediately began to buck and stutter every time I would near a shift point. After some increased application of the throttle, it would generally upshift.
The buck has persisted for about 3 weeks now. It is rarely occuring in low gears now but consistently happens when I'm going about 45, nearing the shift into OD.
Last week as I was driving I opened it up only to hear a horrible crunching sound followed by a loud boing. The Scanmaster showed 37.5 degrees of knock retard.
Now whenever I get on it, similar awful noises happen, lots of knock registers on the Scanmaster, and now the TPS isn't going above about 1.59.
The car is a bone stock '87 GN, save for a dual 2.5 Dynomax exhaust system. Any help, recommendations of good mechanics in New Orleans, or anything else would be appreciated.
First, after parking it in a lot one night, I drove it in the morning and it immediately began to buck and stutter every time I would near a shift point. After some increased application of the throttle, it would generally upshift.
The buck has persisted for about 3 weeks now. It is rarely occuring in low gears now but consistently happens when I'm going about 45, nearing the shift into OD.
Last week as I was driving I opened it up only to hear a horrible crunching sound followed by a loud boing. The Scanmaster showed 37.5 degrees of knock retard.
Now whenever I get on it, similar awful noises happen, lots of knock registers on the Scanmaster, and now the TPS isn't going above about 1.59.
The car is a bone stock '87 GN, save for a dual 2.5 Dynomax exhaust system. Any help, recommendations of good mechanics in New Orleans, or anything else would be appreciated.
