Thread: Misfires and more

Yes that I did with them...red coils looks good.
And you have not better electricity and so with the aftermarket ones?
More power on the car?

The aftermarket ones, both MSD and ZZP, only look nice. There are no performance gains to be had from them.

News on the car....it shot off again and runs very unclean........
So there are more than the coils.
​I don't know maybe the plate under the coils? Other things I don't know...
​Next step is to change the ICM module under the coils

What are the codes?

Next thing happen.....if i put the gas down long time after the speed in HUD goes up to 150 and more and don't come down.
TCS lamp is burning all the time
Computer shows 00
​I don't know what this could be
I think its more broken than I can think

Where do you live?

Corrosion? Pack rats? Squirrels?

I'm curious if there is an issue with the wiring somewhere. Bad grounds will cause a myriad of strange issues.

I agree, it sounds electrical. Have you ever had lights go out or needed to jump start? A bad ground and maybe a bad alternator; both can wreak havoc. I have had an alternator fail and cause issues that manifest like transmission symptoms. Grab a multimeter and check your alternator to ensure you are getting full charging voltage.

Originally Posted by kappa67

Before the change of the transmission (rebuild to HD) the car runs great without problems.

This raises suspicion. Often times when a large component is removed and replaced, grounds get forgotten, wires get pinched or pulled and connectors get crushed.

You also say:

If I put the pedal to the metal then the things I said will come

Makes me wonder if you're missing a connection to the MAP sensor. Vacuum or wiring.

Interesting maybe something forgotten on the transmission
The connector on top of the transmission is the only one?
​Ordered a new Wiring harness maybe is here the problem.

Originally Posted by kappa67

Before the change of the transmission (rebuild to HD) the car runs great without problems.
But these problems couldn't be the thing with the transmission.
I don't think its corrosion the car is everytime in a box.

this is reading like a power supply issue .
take a thorough look at all wiring. there's a harnesss that runs up the front of the right side and breaks off to sensors and other necessities.its to the right of the oil fill cap. pull the insulation back and inspect the wires. sometimes the insulation on those wires can wear. clean bat terms and grounds. I believe there are 3 main grounds to check? even if positive cables from battery look good they can be corroded internally.