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Discussion Starter · #1 ·
I got a BONE STOCK 93 civic si. VIRGIN.
It's running rich.
It has a low idle. low enough to stall sometimes.
No codes no check engine lights
Runs smooth and perfect otherwise
275-300 a tank and smells rich as sh1t
Where do I start diagnosing? Exhaust is tight no leaks and original
Seefoamed intake and no change thus far.
Thanks! First post ever whoop
 

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89 EF 4wd sedan
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974 Posts
Things i would check:

- Ignition timing
- Plugs
- Fuel pressure regulator / vac line
- MAP sensor

Grab yourself the workshop manual to run through the self diagnoses for the last 2 and make sure your timing is within spec.

If you don't have it, i think i've got a copy... PM me your email and i'll send you a copy
 
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