92 Civic HB VTEC swapped NEED HELP!

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ReDevil - 04 May 2006 01:07 GMT

I have a 92 Civic CX(1.5 8v), swapped to a 93 Civic EX (1.6VTEC). The car runs like a champ on the lower cam, but as I top out vtec about 1000rpm before revlimit (7100 I think...) it starts to pop and skip, and my tach jumps like crazy. I unhooked the tach and it is less noticeable, but it still does it. The car has the basic bolt ons, an exhaust, an intake, 9mm wires. I already tried a different distrubutor, different wires, cap, rotor, everthing I can think of. DOES ANYONE KNOW WHAT IS WRONG, I REALLY NEED TO FIGURE THIS OUT

Thanks, Rya

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ReDevil

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jim beam - 04 May 2006 15:08 GMT

> I have a 92 Civic CX(1.5 8v), swapped to a 93 Civic EX (1.6VTEC). The car runs like a champ on the lower cam, but as I top out vtec about 1000rpm before revlimit (7100 I think...) it starts to pop and skip, and my tach jumps like crazy. I unhooked the tach and it is less noticeable, but it still does it. The car has the basic bolt ons, an exhaust, an intake, 9mm wires. I already tried a different distrubutor, different wires, cap, rotor, everthing I can think of. DOES ANYONE KNOW WHAT IS WRONG, I REALLY NEED TO FIGURE THIS OUT.
>
> Thanks, Ryan

dumb questions for you:

1. are you running nitrous? it affects ignition.
2. did you swap ecu's? the ex ecu has different red line. if you're
running up against the rev limiter on a cx ecu, symptoms are exactly as
you describe.
3. is the timing belt adjusted properly? slop in the belt means cam
timing is wandering back & forth all over the place. with the extended
overlap on the high rev cam, that can cause problems.
4. you say your [presumably after-market] tach affects this situation.
what other electrical mods do you have? electrical noise can easily
cause major issues.
5. are you running the stock ex ignition/distributor?

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ReDevil - 04 May 2006 19:41 GMT

1. No nitrou
2. It has the EX ec
3.Timing should be about dead on, maybe advanced slightl
4.Yes aftermarket tach, the only other things I have are a cdplayer with the stack door speakers, I do have a 130 amp alternator thoug
5.And it is all the EX distributo

thanks for hel

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ReDevil

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