Ladies and Gentleman,
Hi. I am new to the forum but have spent many hours reading on here. Here is a quick back ground on my car. So you know what the situation is. Picked up a loaded 2000 Grand Prix GTP Coupe two years ago. First year I owned it, it was rather trouble some. Stage one of repairs consisted of: Rack and pinion, power steering pump, HP and return hoses, front wheel bearings, and outer tie rod ends plugs and wires, fuel filter and a coolant flush, and belts and hoses. Drove for the winter and in the spring I did stage two: wheels, tires, Quick struts, and a cold air intake, u bend, different y pipe and twin magnaflows. Ran great for a year. four months ago my transmission went out. totally stb. I purchased the car with 115151 miles. Trans went out at 158001. I for the most part babied the car. garage kept. synthetic oil every 3k. yada yada yada. Stage 3: New transmission, control arm bushings, had gmpp way bar, put new bushings and end links on, added a trans cooler also, oh and ball joints. Got it put back together, sweet ride. put a 1k miles on her and the CEL started flashing. O2 upstream. O2 Down stream, converter code, and misfire codes. 02 voltages are all over the place. the car runs okay when it is cold. drive it for a mile, goes okay. gets warm, it will kill and wont start if i drive it too long. got her tore apart last night lower intake gaskets were bad, maybe some leakage on the plenum gasket. also vacuum lines were cracked at the t on the s/c. Any thoughs? advise? or otherwise? Sorry about the long read. there are things im missing. Thanks for your time!
Josh
Hi. I am new to the forum but have spent many hours reading on here. Here is a quick back ground on my car. So you know what the situation is. Picked up a loaded 2000 Grand Prix GTP Coupe two years ago. First year I owned it, it was rather trouble some. Stage one of repairs consisted of: Rack and pinion, power steering pump, HP and return hoses, front wheel bearings, and outer tie rod ends plugs and wires, fuel filter and a coolant flush, and belts and hoses. Drove for the winter and in the spring I did stage two: wheels, tires, Quick struts, and a cold air intake, u bend, different y pipe and twin magnaflows. Ran great for a year. four months ago my transmission went out. totally stb. I purchased the car with 115151 miles. Trans went out at 158001. I for the most part babied the car. garage kept. synthetic oil every 3k. yada yada yada. Stage 3: New transmission, control arm bushings, had gmpp way bar, put new bushings and end links on, added a trans cooler also, oh and ball joints. Got it put back together, sweet ride. put a 1k miles on her and the CEL started flashing. O2 upstream. O2 Down stream, converter code, and misfire codes. 02 voltages are all over the place. the car runs okay when it is cold. drive it for a mile, goes okay. gets warm, it will kill and wont start if i drive it too long. got her tore apart last night lower intake gaskets were bad, maybe some leakage on the plenum gasket. also vacuum lines were cracked at the t on the s/c. Any thoughs? advise? or otherwise? Sorry about the long read. there are things im missing. Thanks for your time!
Josh
