Re: Kangarooing 156 - now desperate
At last, some success. Water inside the sparkplug boots! I cannot imagine how I missed this, maybe it was poor lighting or just gross stupidity but cylinders 3 & 4 had heavy corrosion at the base of the cylinder head. They cleaned everything up but suggested new leads, which I will try and find online.
This is the cause of the heavy misfire but time will tell if this makes any difference to the hesitation and kangarooing.
I have an interview in Sheffield on Friday so it should be a good chance to see if the original problem is fixed.
What I discovered is the 156 sparkplug wells especially cylinder 3 & 4 (nearest to the throttle housing) are prone to water leaks from washing. Given the amount of corrosion it was suspected the water has been there for a very long time. I bought the car in June 06 and have not washed the engine so the water has been there 10 months or more.
Everything else checked out ok, no error messages, emissions were good and no slackness in the throttle
The throttle cable was apparently misrouted causing undue stress on the cable. It was not clear if this had any impact upon my problems but it seems it can cause early failure.
Several people have mentioned the ECU, it seems the firmware updates relate to cold start and idle problems but has been known to occasionally improve partial throttle problems.
If the kangarooing persists, an ECU update is next on the list.