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Old 11-12-2012, 07:11 PM   #1
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Question high idle/surge

when start my 95 up the idle some times gose up 2 3500/4000 an will stay there for awile it has a rpm performer intake a f303 cam gt40 heads bbk full length headers a bbk 70mm throttle msd 6al box msd 8455 distributor. iv put new intake 2 uper 5 times they won't seal right i unplug the tps an it idle real good but after2 or 3 min/ both back header tubs were glowing red an then it sounded like something was hissing like a vacuum leak???????? any help would be great
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Old 11-12-2012, 08:12 PM   #2
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I would say timing by description, but I'm just throwing shots in the dark. There are so many variables there man...
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Old 11-12-2012, 10:08 PM   #3
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the timeing at 10
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Old 11-12-2012, 11:59 PM   #4
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Quote:
Originally Posted by tysaint1 View Post
when start my 95 up the idle some times gose up 2 3500/4000 an will stay there for awile it has a rpm performer intake a f303 cam gt40 heads bbk full length headers a bbk 70mm throttle msd 6al box msd 8455 distributor. iv put new intake 2 uper 5 times they won't seal right i unplug the tps an it idle real good but after2 or 3 min/ both back header tubs were glowing red an then it sounded like something was hissing like a vacuum leak???????? any help would be great
If the header tubes are glowing red, then your timing is not set properly or you have a fuel supply issue.
Check everywhere for vacuum leaks, did you get the intake sealed or not?
Do you have the real Performer intake or a Chinese knock off?
Are your fuel injectors and MAF sized together properly?
Are your O2 sensors in good working order?
Is the ECU good?
Have you had it scanned for codes?


SN95's are a pain to get running right when they've been modified, so prepare for a lot of testing and wrenching to get it right.
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Old 11-13-2012, 09:09 AM   #5
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im going 2 put a new set of int gasket on today. i don,t know were the red green hard plastic vacuum lines go
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Old 11-13-2012, 09:16 AM   #6
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Aren't they connected to the smog equipment? I think they were on my Fox before I eliminated it all.

---------- Post added at 10:16 AM ---------- Previous post was at 10:11 AM ----------

Quote:
Originally Posted by 91notchback
Aren't they connected to the smog equipment? I think they were on my Fox before I eliminated it all.
And I was having the same issues, minus the glowing headers. My hard vac lines to smog equipment were trashed. Check for vac leaks anywhere possible.
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