Runs Very Rich

[MRPEPPERRR]

I Have A 94 And A 95 S-10 Blazer Both Have 4.3 Engines

I Just Got Th 95 I Replaced The Plentum Gasket And Egr Gasket
,cleaned The Egr ,replace The Plugs. It Took Care Of Alot Of Problems That I Was Having But Im Still Running To Rich.

Can Anyone Help With This

[JA no Y]

When you changed the plenum gasket, did you notice any dark areas around your CPI where excess gas may have pooled? A leaky CPI can cause it to run rich. Check your fuel pressure to make sure its not too high. Check to make sure you don't have a leacky fuel pressure regulator too. Also check your O2 sensors.

[93LT]

Originally Posted by JA no Y

When you changed the plenum gasket, did you notice any dark areas around your CPI where excess gas may have pooled? A leaky CPI can cause it to run rich. Check your fuel pressure to make sure its not too high. Check to make sure you don't have a leacky fuel pressure regulator too. Also check your O2 sensors.

Acutally, if you'll look at the photos in the follow CPI Replacement Thread Link , my leaking fuel area was lighter, not darker. I had fuel puddled around the left rear bolt head, fuel was spraying out of the outer fuel line (this would all be in the upper right hand corner in the first photo).