Misfire

[Gavin Waddell 18]

mz 1.9 has developed a wired miss fire, when the car is cold it is fine as soon as it gets up to temp aftera few miles its starts to stutter when under a load and want to cut out, if i accelerate hard it cuts revs then dies. The engine was rebuilt and i ran it in for a 1000miles, withno problems. I changed the water temp sensor to the ecufor a spare one that i had and will that improved the problem a bit but not much. also on the misfire it bangs a lot lke its over fuelling.

 

Gavin

[munster 0]

Sounds very much like a dodgy ignition amplifier..

[Roman 0]

mz 1.9 has developed a wired miss fire, when the car is cold it is fine as soon as it gets up to temp aftera few miles its starts to stutter when under a load and want to cut out, if i accelerate hard it cuts revs then dies. The engine was rebuilt and i ran it in for a 1000miles, withno problems. I changed the water temp sensor to the ecufor a spare one that i had and will that improved the problem a bit but not much. also on the misfire it bangs a lot lke its over fuelling.

 

Gavin

try change ignition amplifire....

[Gavin Waddell 18]

i will change the amp for a spare one that i have lying around, the other thing is tyhat ive never had heat paste on the amp, its alwazs been fixed to a big aluminium plate to dissapate the heat.

[kate205gti 4]

ditto ignition amp worth trying a known good one just to be sure!

[large 33]

Water temp sensor,when engine is up to temp it is then over fueling. To test just unplug whan up to temp.

Edited December 26, 2008 by large

[MerlinGTI 3]

Mines just started doing this within the last week ! ECU temp sensor is brand new (changed it a fortnight before the problem began) So im too going with ignition amp.

 

Make sure you get a bosch one mine, I put a GSF one (Hugo) on and it created a missfire all thrugh the rev range.