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Pontiac Bonneville Questions

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It was fine then outta nowhere it just wouldn't turn when i went to start.
Cold Engine surges at 1000- 2000 rpm and has rough idle till about 20 min., then it idles and runs normal. I unplugged the MAF sensor and the engine smoothed out and ran normal. Replaced MAF sensor with remanufactured MAF sensor ( not A/C Delco ) and the engine runs perfect. However, if I stop the car a few minutes and restart the warm engine, it surges badly, then stalls.Pretty much undriveable.
My heat and air barely work. The only time they do work is when I'm going more then 40 mph, and then they still don't blow enough to heat the whole car.
I passed everything on my emissions but my NOx was real high
Problem now for along period. Note battery will drain
if I leave it connected. don't know where to look for a short, or open. No codes read.
I have replaced the fuel filter,crank shaft sensor,coil pk, the cycl and/key. And the car will not start. it cranks but that's it. And the security light is on!!!! Please help this Greek Lady out!!!!
I have replaced the fuel filter,crank shaft sensor,coil pk, the cycl and/key. And the car will not start. it cranks but that's it. And the security light is on!!!! Please help this Greek Lady out!!!!
transmission making a whinning sound
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