My '87 GN sat in the garage for about 5 months. Wasn't driven but started up at least 2 times and backed out of the garage and then back in. I recently had to move it 30 miles to put it in a different garage and it ran terribly bad. No power whatsoever, got quite warm and backfired and died several times. It had been low on gas but I filled it up just prior to the move and prior to it running bad and I'm sure the new gas was getting to the motor. This is a Texas car but it is currently in California and my ex GN mechanic is in Texas. I'm a pretty good mechanic but haven't done much with GN's. The car has had extensive modifications done to it but always ran good prior to this recent move. Now, when I start the car up, while it is idling, there is a small pop or backfire (kind of like a cough) coming from the top of the engine every so often. Does anyone have any quick fix troubleshooting ideas that I might try? And if not, would anyone know of a good GN mechanic in central California near the coast, to wit in Paso Robles or San Luis Obispo or Santa Maria? Any help or suggestions would be appreciated. Thanks