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1800E mixture lean over 3000rpm 1800

posted by  someone claiming to be Rick on  Wed Oct 20 08:55 CST 2021 [RELATED]

B20Paul, those all all good questions, which I will basically answer as yes, have confirmed cam (new and checked timing and lift events during engine build), have new 123 Ignition distributor and checked timing and advance, head is not stock, it is ported and compression ration lowered to 9.5:1, so this is a disclosure I did not make. Fuel pressure I checked at all speeds under load, and this is now at 30psig vs 28psig.

So now I have determined that I have an incorrect MAP sensor for a VW Type 3 1.6L

So have to assume this is my root problem. After I find the correct one, (can you recommend a source?) then I will hopefully have better WOT fuel delivery. Yes, because of the ported head, I may still need more fuel at higher RPM but will cross that bridge at that time.

AEM wide band O2 sensor is quite good to help monitor engine operating AFR.

If you check my first response to C1800 I listed MAP and ECU part numbers there

Thanks. Awesome that everyone offered their advise.

Rick






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