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> How do you fix a 1.8 w Ljet, that is running too lean
jsayre914
post May 12 2011, 04:20 PM
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After seeing the inside of my head, it seems that I have a lean condition. What causes the Lean condition and how can I fix it?

1.8 bone stock with L-jet

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Cap'n Krusty
post May 12 2011, 06:37 PM
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The bypass screw in the air box affects only the idle mixture. The fuel pressure isn't adjustable, except for the vacuum applied to the diaphragm under acceleration. It has a "rising rate" fuel pressure regulator. If there were air leaks, it wouldn't start. The big risk in resetting the spring tension in the airbox is getting it to be correct under a range of conditions. It can be done, but it actually requires a fixture and a way to read the injector opening in milliseconds to calibrate the opening vs. the enrichment. That's if you want to do it right. Running too rich has consequences for the driveability.

I'd look at the distributor, making sure the vacuum capsule works properly, and make sure the timing is correct USING THE PROPER TIMING PROCEDURE, which is far different than the procedure used on the D-jet cars.

The Cap'n
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