156 SW 2003 1.8 TS stalling on acceleration
I'm trying to sort out why I keep losing power on my 1.8TS. It started while I was cruising on freeway. A suddent jerk with engine management failure blink and 1-2 sec later all felt fine. While on the same freeway it got bad as the jerking was constant and I had to struggle to keep speed over 80km/h and not get stranded on the freeway.
The car idles fine for long time. The problem usually manifests it self when I try to accelerate. I think it will always happen when accelerating from 40 to 80km/h on 3rd gear.
First I thought it was the spark plugs so I changed the whole set and cleaned the plug holes, caps and wires. Then I cleaned the grounding bolt beneath car battery. I did the reset procedure with unplugged battery and 90sec MAR, 90sec OFF etc...still stalling. I took a graph from OBD on MAF reading and all seemed fine until the MAF readings stopped and car stalled...after 5-10 sec MAF readings came back and car works fine. Ok, it's the MAF that is broken...or so I thought. I bought a new Bosch MAF but still the same problem!
I'm running out of ideas what to do next. My only straw is that perhaps the MAF was installed so that the loose airfilter box lets the MAF connector rub against the bonnet and the wiring harness is broken. I'll need to test that theory but I'm open to any other suggestons. I did check that battery voltage is ok since that was a pinned "fix" on some of these engine management errors. Also I'll try to log more data with multiple datasets to possibly pinpoint the problem.