2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.
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Old 01-25-02, 12:33 PM
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Originally posted by mazdaspeed7
Have you messed with your timing? Advanced timing requires a higher octane gas to prevent detonation. The fall-off in power could be from minor detonation, and the higher octane gas would prevent that.
I don't know. I didn't put the engine in, I had a shop do it for me. Put it in 20k miles ago.

Maybe they advanced it for me ?
Oh well, I guess it's high octane gas from now on. I also notice the car pull harder. Sign of advance timing?
Old 01-25-02, 12:35 PM
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I rev fast to 7kRPMs but it gets sluggish/rough at that point.

This is with RBheader and pre-silencer.
Old 01-25-02, 12:37 PM
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Originally posted by MaxRX7
I rev fast to 7kRPMs but it gets sluggish/rough at that point.

This is with RBheader and pre-silencer.
Do you have a series 4 or 5?
Old 01-25-02, 12:59 PM
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Originally posted by pd_day


Do you have a series 4 or 5?
this is on a IV 86GXL
Old 01-25-02, 01:07 PM
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Originally posted by MaxRX7


this is on a IV 86GXL
Is this since your got your header?
Have you tried fuel injection clean/change fuel filter and use high octane fuel?
Old 01-27-02, 03:34 PM
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Originally posted by pd_day


Is this since your got your header?
Have you tried fuel injection clean/change fuel filter and use high octane fuel?
you know, that is a VERY good question.

to be honest I don't really remember. This is 1 of 5 cars I drive plus I installed the header months ago.

I know 1 thing for sure, the injectors are stock and never cleaned, and they have a LOT of miles.
Old 01-27-02, 04:27 PM
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How much louder are you cars w/ the Headers w/ presilencers?
Old 03-18-02, 09:09 AM
  #33  
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I solved my problem finally.
3 words.
"4 gauge grounds"
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