air flow meter is a good candidate. timing should at least be in the ball park of correct. Too advanced initially isn't good. but the old sensors back in ! Scott
----- Original Message ----- From: "Robert Stewart" <robertmstewart@MAC.COM> To: <vanagon@GERRY.VANAGON.COM> Sent: Saturday, August 08, 2009 11:39 AM Subject: 1988 Rebuilt Engine Stumbling at various RPM levels 2100-2300, 3400- 4000rpms
>I just got my Rebuilt Engine back in my automatic 88 wolfsburg. It's > been Stumbling at various RPM levels between 2100-2300rpm & 3400- 4000 > rpm's. > > It has good power through the band but if you are not pushing the > accelerator down and staying steady at any of the RPM ranges stated > above it will stumble once in a while, not continuously. > > The engine only has 100 miles on it so far. Mostly country road > driving with very little highway driving. > > It has a brand new bosch O2 sensor, all other sensors on the van are > new. > > New Fuel Lines, Injectors are 2 yrs old. New fuel in the tank, all old > fuel in the tank was removed. All new fuel lines on the tank as well. > New Oil filter and Fuel Filter. Air Cleaner just cleaned. > > Any ideas of what I should be looking for? > > Could it be the advance timing on the engine? > Maybe it was set incorrectly? > > AFM problem? > > Thanks, > Robert > NY |
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