Timing problem.

For all non stroker / performance related problems and discussion.
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Xtultegra
Learning to use the board
Learning to use the board
Posts: 36
Joined: February 19th, 2019, 12:44 am
Stroker Displacement: 4.6
Vehicle Year: 1991
Vehicle Make: Jeep
Vehicle Model: Wrangler

Timing problem.

Post by Xtultegra »

I got my stroker together and it fired up but was running rough. It will rev ok up to about 2500 rpm then it misses badly. I put a timing light on it and its running about 50 degrees advanced at idle. I tried advancing distributor up one tooth and it got worse by about 10 degrees. Help!
Bertismyname
I think I'll order a "tab"
I think I'll order a "tab"
Posts: 41
Joined: May 12th, 2020, 8:01 pm
Vehicle Year: 1999
Vehicle Make: Jeep
Vehicle Model: Cherokee

Re: Timing problem.

Post by Bertismyname »

You probably have the distributor off by a tooth.
Xtultegra
Learning to use the board
Learning to use the board
Posts: 36
Joined: February 19th, 2019, 12:44 am
Stroker Displacement: 4.6
Vehicle Year: 1991
Vehicle Make: Jeep
Vehicle Model: Wrangler

Re: Timing problem.

Post by Xtultegra »

This really threw me for a loop. All sensors were new. I was very careful how I put timing chain on. I reinstalled the distributor 5 times. One tooth back one tooth forward etc. Then just put it back how i knew it should go. Was thinking bad distributor? Bad CPS or i put timing chain on wrong. So then I replaced tps with old one, no help. Then I replaced the new crank position sensor with the old one and voila! She ran perfect. Somtimes new parts are bad.
Xtultegra
Learning to use the board
Learning to use the board
Posts: 36
Joined: February 19th, 2019, 12:44 am
Stroker Displacement: 4.6
Vehicle Year: 1991
Vehicle Make: Jeep
Vehicle Model: Wrangler

Re: Timing problem.

Post by Xtultegra »

Thanks for the reply Bert!
Bertismyname
I think I'll order a "tab"
I think I'll order a "tab"
Posts: 41
Joined: May 12th, 2020, 8:01 pm
Vehicle Year: 1999
Vehicle Make: Jeep
Vehicle Model: Cherokee

Re: Timing problem.

Post by Bertismyname »

If it ran before it came apart I usually put the old sensors back. I know it's hard to do with a new build. The desire to replace everything and think that it run trouble free for thousands of miles is strong in all of us. Im glad you figured it out. I try to only use factory sensors. They cost more, but they are usually trouble free.
Xtultegra
Learning to use the board
Learning to use the board
Posts: 36
Joined: February 19th, 2019, 12:44 am
Stroker Displacement: 4.6
Vehicle Year: 1991
Vehicle Make: Jeep
Vehicle Model: Wrangler

Re: Timing problem.

Post by Xtultegra »

Sounds like a sound strategy. I don't know what brand it was. I bought so much stuff.
Team Fred
Posts: 3
Joined: September 12th, 2020, 2:42 pm
Stroker Displacement: 4.7
Vehicle Year: 1989
Vehicle Make: Jeep
Vehicle Model: Cherokee

Re: Timing problem.

Post by Team Fred »

Thanks for posting this. I just ran into the same thing. Only difference was I used all of the same sensors but still had a bad CPS. Mine would only rev to 1000rpms. This
Post saved my sanity for sure.
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