2nd Generation Specific 1986-1992 Discussion

Running rich and rough.

Old 06-06-2019, 07:13 PM
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Location: Central Oregon
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Default Running rich and rough.

89 fc s5 convertible new engine built by reputable 4otary tech

Was running ok, but would not power past 6000 rpm, so I replaced fuel pump with walbro.

Now it only starts with starter fluid. Runs rough as heck, blue smoke (unburnt fuel smell).

Giving gas makes it run roughly up to 4000 rpm before it stalls back to idle or kills engine.

Can't accellerate enough to move car before it chokes on fuel and dies.

Any ideas? I can't figure out why a simple fuel pump swap would cause this problem.
onthedot is offline  
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