This is no new issue with my car its been like this since i got it. Its starting to really bother me tho, im not sure what it is im guess a coil pack or clogged injector. But anyways i get a misfire from about anything under 2k rpm. Like say going up a hill in second or third, at around 1500 rpm it will start to misfire crazy. But it doesnt do it reving past anything above 2k rpm. i have no cels, anyone got any ideas?

 

So you waited over A year and A half to fix this problem sounds like one or more of your coils or plugs.

 

what is the idle like?

you have no cel but do you have any codes?

spend $50 on a code reader i dont believe in telling people to read the flashing lights.

there are codes without the cel also.

 

Could be a bunch of things.

Clean MAF and TB per the how tos. Check CPS, TPS, CKPS. CHeck coils. Prolly change spark plugs. Check PCM.

 

I cleaned the TB and replaced the spark plugs just recently. CPS is good but ill check the others you listed.

 

Before spending money on a code reader, grab your multimeter. Search for how to test your coils and fuel injectors, it should be a resistance test. Misfires can be more apparent at lower rpm levels and are less noticeable at higher levels.

 

check your maf!

 

Before you invest in gasoline you should invest in a code reader.

Youre just not gonna make it long term with a car you cant diagnose with one, clear the codes.
I feel the need for one with freeze frame info too.

Code reader or get in shape for a bicycle. Todays cars need one and they are cheap now.

 

If you are at idle and you feel a small jolt from time to time, more than likely its your coils going bad. They are failing under load and the multimeter would not help you finding it. My trick I did was put it in D with parking brake all the way up and chuck the back wheel. It should still be jolting if its bad. Unplug the coils one by one. The engine will shake but also you would feel the jolt still you unplugged a good one. Keep going until you find the one that does not make it jolt and that's the defective one.

 

Yeah ive read about this, one thing tho my cars stick. But ill try it at idle.

 

Hmm...yeah that's going to be difficult. But let us know if it helped you out. It may also be more than one if you can't find just one.

 

Do a compression/leakdown test. A burned exhaust valve will cause a miss at idle and feels like it cleans up cruizing. Will get a bad miss again when pulling. A bad injector could cause a burned exhaust valve BTW.

 

I've been having similar issues with my 97 Max (150K Miles). Misses bad between 1200-1800 RPM while going between 30 and 40 mph. Will also miss at idle and warming when warming up, and there is hesitation upon attempted acceleration.

I sent my fuel injectors off for sonic cleaning (Witch Hunter), according to their data the injectors were a non-issue. Also thoroughly cleaned the throttle body, EGR Valve, EGR Guide Tube, IACV...

I suspect a failing coil pack. Won't know for sure until everything is reinstalled though (having installation issues). Been going on for about 6 months now.

 

I think i found my issue if the coilpacks are grounded off the valve cover then thats it. Because my valve cover is painted and i dont think its getting a good ground.

 

The coils are grounded through pin two of their respective connectors and that ground runs to the top of the lower intake manifold on the passengers side of the engine.

 

fuel injectors