new stroker 4.6 idles fine till 2500

[Muad'Dib]

Well at least it was a easy fix!

[SilverXJ]

Interesting symptom, but I can understand how it happens. Glad it was an easy fix!

[irish offroad]

i had the same problem played with it for 3 days i couldn't find any thing out of place. even resorted to swapping parts. on a whim ( i have enuff spare parts to put like 3 jeeps to together at all times ) i swaped out the comp (ecu) from a 91 to 94 cherokee / grand cherokee / comanche / wrangler dose'nt mater as long as it is a 4.0L there isn't any difference even if it is stick or auto. and found out that out of the dozen or so i have 4 out of 12 did the same thing would have a rev limiter at like 2500 to 3000. runs fine as long as you dont can it and then nothing. give it a shot but careful that you don't get a bad one. and i haven't been able to tell what the deal was in the comps to know why it would kick in. so swap in a bone yard comp and try it out.

[bamaboyz71]

I'm rebuilding my son's "99" jeep wrangler 4.0l I wan't to just buy a 4.2 crank and rod's from auto zone and some good piston's alone with just a basic rebuild job bored 20 over. can you or would you tell me what to do and if or what kind of a problem I might run into ? I was looking at what you were going throwe and this is why I'm asking you.Thanks

[Livnlyfe38]

K so I got the distributor back in where it idles fine. Still wont go past 2500. It also backfired out the exhaust once and out of the intake once when I was trying to floor it a couple times.

Any Ideas?

Plugged up cat.

Took off the exhaust from the header back. Sounds cool, but no difference

Low fuel volume/pressure

31psi, 40 with the vacuum off. Tried flooring it at both, No difference

Personally my money's still on the distributor, mine was the exact same, dizzy was 1 tooth back, moved it 1 clockwise and all was good.

Go my HB keyed. Put a timing light on it. 12* Distributor is fine. I will post up a video tonight

I did the same and mine fired up crrectly, thanks for he info.