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View Full Version : Motronic 1.3 Engine stutters and stalls when I disconnect the AFM



Mordan
04-23-2012, 10:32 AM
Hello,

I'm told that you can disconnect the AFM and the engine should continue to run albeit roughly... i.e. safe mode limp mode back home.

When I do that on mine, it does not. For those who know well the early motronic design, what does it say to you?

Thinking while writing. Limp mode is enriching the A/F ration and uses a fixed map. I guess the injector pulses are simulatenous as well. So I may have too much air or too much fuel that stall the engine.

The car runs well otherwise albeit MPG is not that good.

IMO there is a little thing wrong with the engine because it should be able to run with the AFM disconnected.

new O2 sensor. CPS ohms ok.

ahlem
05-01-2012, 06:21 PM
Vacuum Leak?

genphreak
05-04-2012, 03:29 PM
Many places to check for a vacuum leak. You've missed one. Sometimes takes a few weeks to get 'em all.