Question about 2000 Pontiac Grand Prix

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Car keeps misfiring during acceleration and up hills have changed plug wire and all three coils also cooling fans do not run unless the a/c is on

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  • titans1275 Mar 24, 2011




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Sounds like either a timing problem or someone has crossed up the wiring try grabbing a haynes manual from local parts store 20bucks but priceless to have book will give fire order an even hes trouble shoot section that covers alot of problem issues.will have wiring and all other schematics and part pics

Posted on Mar 23, 2011


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1 Answer

I guess its not so much a back fire but bad misfire. will not go up a hill keeps lurching ahead under the misfire...

Often it takes a load to bring out the misfire like hard acceleration or climbing a hill, did you check the spark plug boots on the coils for signs of burning or other damage of any kind.

Dec 29, 2016 | BMW Cars & Trucks

1 Answer

Misfire po300

Error Code: P0300
Random/Multiple Cylinder(s) - Misfire Detected
Problem Area:
Air Intake System leaking.
Fuel Supply faulty.
Injector(s) faulty.
Ignition Cable(s) and/or Spark Plug(s) faulty.
Ignition coil(s).Exhaust Gas Recirculation (EGR) Valve stuck/open.
Camshaft Position Sensor faulty.
Low compression.

Check Misfire Recognition.
Check Air Intake System.
Check Fuel Supply.
Check Injector(s) and Injector Sealing.
Check Ignition Cable(s) and Spark Plug(s).
Check Ignition Coil(s).
Check Exhaust Gas Recirculation (EGR) Valve .
Check Camshaft Position Sensor.

Feb 25, 2014 | Chevrolet Cobalt Cars & Trucks

1 Answer

My escape keeps misfiring on cylinder 6 and has another multiple misfire, i have to change the spark plugs seems like every other month and ive replaced the boots and it still misfires anyone have thi

The flashing light means the problem is serious and you should not drive the truck. This probably happens when you are accelerating.
Since each cylinder has a coil, it could be moisture in the main wiring harness or a connection.
Could also involve the fuel injectors. You could have water in the gas for example.
The code means that cylinder is not producing power, not a lack of spark.

Jan 13, 2013 | 2004 Ford Escape

1 Answer

Surging/loss of power up steep hills in Daewoo Lanos 2001

This sounds like you may correct in saying a misfire. this sounds like a bad coil that looses power under a load. Is check engine light on?
If the light is on or not go to an auto parts store like auto zone.At auto zone they will scan the computer free of charge and give you a print out of any codes. the computer will store code or codes when it detects a problem. A bad coil will make it store a code or should.
see if there are any misfire codes, this code will help pin point the bad coil. if there are codes write me back and give me the code. I think this car has coil over plug ignition system. this just means instead of sparkplug wires the coil sits right on the top of the plug.
Also replace spark plugs if it has been a while since they have been replaced. check air filter too. a matter of fact if you have over 70,000 miles on car tune it up. plugs,furl filter if it has one, air filter and pvc valve and clean throtle body.
Okay, just checked it out, this car if a 1.6 engine then does have a coil but not on spark plug, rather coil with sparkplug wires going to plugs. try replacing spark plug wires and plugs first and if problem remains then replace the coil. let me know the results. good day

Apr 15, 2012 | 2001 Daewoo Lanos

1 Answer

What makes a van 3.3.liter skip when it warm but not when its cold do you think it may be the coil

The most common causes of a skip or misfire is a bad plug wire[s] or spark plug[s]. Here's what I look for whenever I do an initial test drive to verify a misfire, stumble, or skip complaint. Once the motor is warmed up I get up to about 48 mph. At that speed the transmission is in 4th gear and the torque converter clutch is locked up giving the engine a solid connection to the drivetrain so any little skip can be felt [you usually can't feel a misfire unless the Torque Converter is locked up due to the fluid drive dampening the sudden but brief change in crankshaft speed during the misfire] Once I'm at 48mph I ease into the throttle just as much as I can without the transmission downshifting. This combination gives you the leanest fuel condition, the highest spark load on the ignition system, and a solid engine to drivetrain connection which makes catching a misfire quite easy. With a little practice at this they'll stick out like a sore thumb. I RARELY have to replace a coil on a 3.3L but often have to replace plug wires and plugs. Look for black soot like coating in the far end of the plug wire boots, rusty or corroded coil towers [where the plug wires attach to the coils] or worn spark plugs. 9 out of 10 times that's where I find the problem. If you're handy with an ohm meter you can test the plug wires and should find about 1,000 ohms per inch of wire. The reason most misfires aren't felt on a cold engine is due to how rich the fuel system has to be to keep a cold engine going and its far easier to fire a cool/rich fuel mixture than a hot/lean mixture. You usually can't feel them during fast/hard acceleration for the same reason and the torque converter clutch is usually disengaged during both of these types of operation.

May 18, 2010 | 2000 Dodge Caravan

2 Answers

P301 Code on 2001 Ford Taurus SOHC (not FFL) with 253K miles. Replaced plugs and wires with Bosch Platinum +4 plugs and Motorcraft wire set. P301 returned almost immediately. Engine performance extremely...

Coil pack should in the front top of motor, with engine running remove one spark plug wire at a time from coil pack ( careful not to get shock ) they should all have spark, if one don't replace coil pack.

Jan 23, 2010 | Ford Taurus Cars & Trucks

4 Answers

97 Expedition, 5.4L hesitated during acceleration 40-45MPH. Check Engine light flashed, then stayed on. Would get up to 55-60MPH. All guages read ok. First trouble ever with this car.

go to a parts store and they will let you use their scanner for free. sounds like a cylinder misfiring. The scanner will tell you which one it is.

Dec 13, 2009 | 1997 Ford Expedition

2 Answers

96 Ford Explorer is studdering (misfiring) when going up hills

I have the same exact problem that just started immediately AFTER I got a tranny service where they changed the Trans Fluid, Trans Filter, Fuel Filter. Took it back and they say nothing is wrong with it. Took it to the dealer thinking I could get some REAL answers... they just told me to replace spark plugs, wiring & coil, for $900. Only studders when quickly accelerating above 40mph. I've check other forums, they say to clean the Mass Air Flow sensor. Haven't tried it yet. This seems the easiest before replacing spark plugs. Any other suggestions anyone?? Please.....

Oct 23, 2009 | 1996 Ford Explorer

1 Answer

My car misfired climbing hills, so I changed the plugs & wires and coil. Then it ran good at acceleration, but misfires and stalls at an idle. the wires are also arching now.

"2001 pontiac sunfire. Do not replace your starter if you think that is the problem this car has been recalled, I just got mine fixed yesterday and yes that is the problem of it starting sometimes and other times we'd be bumping it. NOT ANYMORE!!! woohoo" The problem is with the ignition and a wiring kit. FREE recall

Aug 12, 2009 | Pontiac Sunfire Cars & Trucks

3 Answers

Vehicle "Choking" While Driving

On my 2002 windstar, I had intermittent problems with the engine light flashing while the motor was accelerating or going up a hill, about 3 minutes into a drive following being left alone all night. During this time, the car engine shook and acceleration was poor. Later, the problem was minimal.

Root cause:
The coil block has one coil for two cylinders. In my case, the middle coil fires cylinders 2 & 6. When I cleared the codes and got the problem to occur again, the codes came back at the same time. I removed the cowling to access the col block. When I examined the bottom of the coil, I discovered that a crack had occurred across the resin just under the location of the middle coil.

Autozone has a diagram of the pinouts of this coil block you can download to see if your dual-intermittent cylinder misfire problem corresponds to another coil in the block.


When moisture gets into the coil, it causes the problem. When moisture is driven out of the crack by engine heat, the problem subsides.

Procedure I used for repair:

Access: Remove Cowling:
1. Remove Wipers
2. Loosen Plastic Cowling cover
3. Remove washer fluid hoses from nozzel
4. Remove plastic cowling
5. Disconnect wiper power from connection on drivers side wiper motor.
6. Disconnect wiper fluid hose from connection above passenger front wheel.
7. Remove metal cowling.
8. Change out the coil with three screws - very easy to do.
9. Replace components in reverse order.

Note: While I was at it, I changed the wires and the spark plugs. The spark plubs in the back were accessable but hard to get to without a swivel head socket wrench.

Mar 22, 2009 | 2001 Ford Windstar

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