7 replies to this topic

[Trick77]

I have a '95 sidewalk which has been running fine for a long period of time. It has just started to drop revs on tickover and stall every now and again??
My first feeling is stepper motor but wonder if anyone has a better educated idea?

Thanks

[JonnyBMX]

hmmmm, does it do it when ur driving along? or litrally only on idle? whats ur idle speeed? could be the airflow sensor?

[Trick77]

Ok, thanks. its only on idle. sometimes its fine and will hold at around 900. then other times it will just fall off completely and stall.

[minimissionary]

Sounds like a vacuum hose has split. Take the air.box off and follow the coloured plastic hises to the ack of the manifold. Follow them from here to the ecu. Check for splits in the elbows. Even the tiniest split can cause the ecu to misfuel, causing the engine to stall.

[Trick77]

Sounds like a vacuum hose has split. Take the air.box off and follow the coloured plastic hises to the ack of the manifold. Follow them from here to the ecu. Check for splits in the elbows. Even the tiniest split can cause the ecu to misfuel, causing the engine to stall.

Spot on. Thanks a lot!! The elbow was sheered off.

[minimissionary]

If thats the case, check your engine steadies. If they have excessive movement, the elbows can get bashed on the bulkhead.
Glad you've got it sorted.

[Miniholic]

Had this happen to me recently after I had finished the mechanical rebuild. Cue lots of headscratching and thoughts of expensive parts, turned out I'd not connected the vacuum pipe to the fuel trap outlet.

[Trick77]

Thanks guys. It has definitely rocked back as both of the vacuum hoses were split at the elbow in the same way. I bought minispares race poly bushes which i will put in and hopefully stop this. Thanks again.