When u first start car u have to mash gas petal so it will idle sometimes it dies idleing . when u first back up it hiestates to go . u have to drive off slow when u put in drive then sometimes going down rd it starts jerking u have to let go gas then mash again for it stop jerking and at red light u have to mash brake and gas petal to keep from dieing sometimes but when it gets working u can feel when it has kicked in gear have bought fuel filter just hasnt put on yet.
Wow that was alot of parts and money.
Is code 300 the only one in the computer ?
Have you checked fuel pressure with a gauge ?
SOURCE: 96 pontiac sunfire bogs down and dies when I apply the gas.
as far as the bogging and dieing,it sounds like the tps.a simple trottle body service would fix that.for your new problem you need to some test before pointing to a salution.start the car and cover your tail pipe.as pressure builds it push you hand off.a clogged cat will put to much back pressure on the engine.i would un plug the mass air flow sensor and try running the car.this will turn on the check engine light.check your air filtter and plugs.also check your wires.a nother test is a coil strees test.(you have to go to a shop for this)if the car runs ok with no load but spitts and sputters in drive you may have a openning coil.checking with a meter only works if it does not run.last but not least while you at the shop,have them check your timing.a faulty cam sencer will bog the car down with bad timing advancement but not throw a code.
hope this helps,remember to keep it simple,expensive elec. parts are not always the problem
SOURCE: 1984 fiero
sounds like u got a timming issue or a wire on the wrong plug geta book and check your firing order
SOURCE: 1997 pontiac grand prix with major issues
Dummy lights. I found that if the tire pressure low light reset button on a 1997 Pont grand prix is located under the steering dash. The button is yellow. Just push it in for 5 seconds and it will reset the indicator light.
If you have a engine service soon light on and the vehicle stalls often. Replace the MAF sensor. It runs about $250.00 from Auto Zone. They will credit back or pay back $92.00 for the old MAF part taken out. This will allow your 1997 Pont grand prix to run without idle problems and stalling issues.
SOURCE: car idles rough and stalls
Have you ever changed the fuel filter? If it's not that, and it's not a vacuum leak, it is probably your idle air control valve.
SOURCE: car wants to die at idle and slow rpm speeds
If they used a spray to clean the carb, then all the junk that was in the carb burned off on your plugs. You probably got a lot of black smoke out of the exhaust when you first drove the car away. Check the plugs. They are most likely gummed up with the residue from the carb cleaner. Either clean the plugs or invest in a new set. This should ensure that the car fires on all 8 cylinders. Driving on the highway, you'd be less likely to notice the problem since you need less power to move through the higher gears. If this doesn't solve your problem post back and we'll diagnose it further. Best of luck!
Greg
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