Engine Shaking at Idle

Hi Andy,

excuse my direct words: You are one of those building in errors that others have to correct. When I read that you start to change transistors just because you read something on the Internet I already start to get shocked. Sorry for my clear words. There are jobs to do yourself and jobs for specialists with proper test equipment. Test equipment allows you to verify your repair for correct operation. And tuning a MAP sensor or repariring a ECU is such a specialist job.

A "4" in the middle means your MAP sensor was built in the 80s. There is a risk that it çan be so bad that even I would not be able to tune it properly. I have seen such cases before with MAP sensors after normal production time of D-Jetronic, meaning after 1976. Unfortunately some were assembeld with wrong components and can never have worked. That is why I say " Only trust MAP sensors with rivets from 70s and with untouched black caps".

Do you know someone with a proper running 450 engine around you? Then check whether he/she also has 0 280 100 100 MAP sensor and swap to see how your car runs then. That is my best advice to you.

What transistor did I replace?

Hi Andy,

I am sorry and apologize. There was something I misread on your long list. When reviewing it now I could not find what I had believed to read.

Hi Andy,

have you worked on the flywheel or vibration damper?
If yes this can cause the mentioed problems ..

All the best

Josy