Question about 1994 Pontiac Grand Prix

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When i step on the gas the car hesitates for a second or two then runs normal for aminute or two then acts like a miss againespecially when going up a hill.i have had the tranny overhauled by a reputable trans shop.when I took the car to a mech. Shop and with the symptoms described above the sent me to the trans shop where I had the tranny rebuiltthe tranny guy said I needed a coili bought and put in the 3 coils and It did not helpi then changed the gas filterthat did not help.the engine lite stays on.i do have 400000 kms on this car (240000)miles.help would be appreciated. The tranny has 4000 miles since overhaul.the swede!!!!

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  • Pontiac Master
  • 3,828 Answers

Sounds like maf fault
if a plastic accelerator the pedal sensor
auto kick down solenoid

Posted on Apr 10, 2017

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Posted on Jan 02, 2017

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Benimur
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SOURCE: i need engine parts for overhaul of 1998 nissan serena 2.5 liter direct injection turbo diesel engine

Hi again,

Is your Serena:
1. auto transmission or conventional shift?
2. 4 wheel drive or Front Drive?

Salamat ulit.

Posted on Jun 27, 2008

  • 69 Answers

SOURCE: 2001 Pontiac Grand Am SE

answer is on other post.

Posted on Aug 14, 2008

  • 13 Answers

SOURCE: shift concern on 2002 isusu axiom 4l30 e

the problem of the bump is not the trans.....remove the driveshaft...seperate the slip joint....clean out old grease in there and replace grease and re assemble with a new clamp or heavy zip tie.
ford makes a nice teflon grease.....i have done this repair dozenz of times when i worked at an isuzu dealer.
good luck

Posted on Feb 15, 2009

  • 9 Answers

SOURCE: battery lite stays on when engine is running

If you have checked the battery, alternater, fuses and relays, it could be a faulty earth. Alternater may be faulty, there is a very good chance your fan belt may need tightening, your fan belt should not be too slack as if it was slack, it would not charge the battery properly and thus cause the battery light to stay on, if you push down on the belt it should move a little, but hardly much, if it is slack you may also get a squeal especially in wet weather, I would reccomend that you replace the fan belt. This is not expensive especially if you do the job yourself.

Posted on Mar 11, 2009

  • 611 Answers

SOURCE: car hesitates when spepping on gas,than when it

fuel injectors are bad

Posted on Dec 22, 2009

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Why do i hear my fuel pump on a 2004 pontiac bonneville whining up and down?


Walt, You will hear the fuel pump at times. When you take the gas cap off the fuel tank is acting somewhat as an echo chamber that is amplifying the noise of the fuel pump. Presumably the engine is ticking over when you remove the gas cap? Otherwise the fuel pump should not be running.

The fuel pump only supplies fuel on demand - obviously. The pump will run to pressurise the system to meet demand and if that demand for fuel fluctuates, the pump will run down or increase speed accordingly. This speeding up and running down of the pump is constant.

If by 'a miss' you mean that the fuel pump goes quiet for a second or so - that's normal. No demand for fuel - the pump doesn't run. That wouldn't effect the engine at tickover.

If the 'miss' is from the engine at tickover that's more than likely to be a plug.

If your car runs okay at speed and doesn't cut out and then will restart almost immediately, it sounds as though your fuel pump is okay.

Mar 21, 2016 | 2004 Pontiac Bonneville

1 Answer

Im working on a 1993 cutlass ciera 3.3L it was missing pretty bad and i changed the plugs and wires also i change the fuel filter still missing but not as bad as before i only gaped the spark plugs at 040...


That 3.3 liter buick engine uses the magnavox coilpack and they are prone to failure. They will give you a weak spark and the engine will be hard starting when it gets to be 30degrees out or colder. The spark output will dissapear when put under a larger load (steping on gas 1/2 throttle or more) causing the engine to misfire at that time. those engine always ran rough at an idle so dont take that as a definate skip. you will never get that engine to run so smoothe that it doesnt wiggle a little when just standing there looking at it. due to the lack of spark and power when it looses spark when moving and giving it 1/2 throttle or so, the transmission will jump into passing gear or 3rd to 2nd(downshift) suddenly because you are giving it the command to by giving it 1/2 throttle. fix the skip and the transmission will prabably act normally. you can usually tell if the coilpack is bad by removing 2 oposing spark plug wires and using a multimeter on the ohms scale, ohm the coil posts out and you should have aproximately 15,000ohms. if you have more than 18,000 or less than 12,000ohms you definately need to replace the coil. the car could have many diffrent problems causing what you have described but my money is on the coilpack. I worked at the G.M. dealer for 15 years and have replace MANY of them.
Good luck , Scott
P.S. - Yes , regap your plugs to .060" but that will not cause he skip

Aug 24, 2011 | 1993 Oldsmobile Cutlass Ciera

3 Answers

Hesitation when I step on the gas


The tps or throttle position sensor could be getting flaky, but without a code I don't know if this is the case.

The map sensor if equipped could be giving false manifold readings.

The mass air flow sensor could be bad if so equipped.

I'd be guessing without more data.

Jul 06, 2010 | 1995 Chevrolet Cavalier

3 Answers

Hesitation & missing


distributor under the rotor and cap, if not the rotor and cap (or ignition pack-coil if its not cap and rotor.)

Aug 16, 2009 | 1993 Chevrolet Lumina

2 Answers

I have a 1995 maxima with hickup or hesitation


It sounds like a clogged catalytic converter. If you can unbolt it; try unbolted it and see how it runs. Also try unplugging the sparkplug wire one at a time and see if the shaking gets worse or stays the same. When you pull a spark plug wire and the car stops shaking then that cylinder isn't firing. Watch out though, you'll get a nasty shock if you do it without insulated pliers. It could be a stuck valve or bad ignition.

Jun 01, 2009 | 1995 Nissan Maxima

1 Answer

Engine Missing / Hesitation Cold Weather


run the fault codes
check for problem ambient temp sensor, baro sensor , maf/vaf sensor problems

Apr 07, 2017 | 2002 Chevrolet Silverado 1500

1 Answer

Engine seems to be missing


it sounds right, it is called a light load miss. it occurs mostly at 45-50 mph on slight incline and it feels like a bucking or hesitation. It commonly ocurs when there is carbon tracking on a spark plug porcelin (sp) . note . if the porcelin has carbon tracking so does the plug wire boot. the spark will travel through the carbon track in teh boot after plug replacement causing premature failure of the plug. it is a good idea to replace plugs and wires if this is the cause of your miss.

Dec 20, 2008 | 2005 Dodge Caravan

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