Question about 2003 Pontiac Grand Prix

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My car is hesitating when I accelerate when I first start it after sitting idle. I have been told it is the 1,2 shift cylanoid. What is this, how much to repair, how serious, I have taken it in to the shop 2x it is not showing up on the computer read out, they took it out for a couple of rides today and it finally did what I described. This is their conclusion, I thought it might be fuel related, eg. gas filter or injectors need clean?

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  • Pontiac Master
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What is hesitating - the engine or the transmission?

When starting the car and putting it in gear, if the transmission shifts immediately into first gear and then shifts smoothly from first to second gear, I doubt its a transmission problem. However, if that isn't the case, you will probably need a new or rebuilt transmission ($1500+).

Engine hesitation can be due to a lot of things related to the fuel system that won't necessarily show up on a code reader - for example, dirty throttle body, fouled IAC (idle air control) motor, fouled EGR valve, etc.

Posted on Jul 01, 2017

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6ya6ya
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Posted on Jan 02, 2017

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PyroPCMan
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SOURCE: 98 pontiac bonneville hesitation and jerking

When was the last time spark plugs and wires where done? That could be a possible cause, also check the timing through the distrubotor cap.

Hope this helps

Posted on Jun 30, 2008

  • 4 Answers

SOURCE: 2004 pontiac montana minivan. engine

Have you checked your brakes

Posted on Jan 30, 2009

  • 14036 Answers

SOURCE: Car wont stay running, even with foot on the gas.

fuel pump is getting ready to shut down replace it.

Posted on Mar 17, 2009

  • 328 Answers

SOURCE: car hesitates when press gas and engine light on

could be ur transmission shift solenoid

Posted on Apr 08, 2009

  • 6982 Answers

SOURCE: my 93 grand am seddenly

knocking in an engine is never a good thing. I'd check three things: engine bearings, valve lifters and timing chain, all of which can make noise. First thing though, is to put a mechanical gauge in place of the sending unit and check actual engine oil pressure. this will give you a good idea what is going on. low readings can be bearings, normal readings can be the other two items. I could give you a definite idea by listening, but I really can't hear it from here.!(one of the frustrating drawbacks to doing this online) An experienced tech can listen and tell you pretty much what's going on.

Posted on Apr 18, 2009

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Wont go from stop/small inclines jerks also when accelerating


follow your mechanics advice.but all fuel systems have a filter that can be changed

Jul 19, 2017 | 2001 Mazda MPV

1 Answer

Hesitation during acceleration


could be the type of plug you are using.I was told only to use ngk plugs.I recently put bosch plugs in my mazda 3 and the check engine light came on and it started missfiring.

Apr 26, 2009 | 2004 Mazda 3

1 Answer

Hesitates on acceleration


Does the car always hesitate during acceleration? If it ALWAYS struggles when it starts or ALWAYS hesitates on acceleration then I would say the issue is fuel delivery. If the problems are more intermittent and come-and-go then it could be an electrical issue.

I would start by changing the fuel filter. Changing plugs, wires, cap, and rotor are all good things to do as your budget will allow. I doubt you will have to change your injectors.

If you end up replacing any rubber fuel line, be sure to use the high-pressure stuff made for use on fuel injected cars.

I hope this helps! -Nick

Apr 10, 2009 | 1983 Chevrolet Chevy

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