Isonblade
Registered
hello,
Euston we have a problem.
I run a gen 1 stock engine installed in a car, it as ran faultlessly since installation 2 years ago.
During a track day it all of a sudden lost power and ran rough, it was towards the end of the day so I trailered up and sulked all the way home.
Symptoms,
it is difficult to start, almost as if timing is advanced.
It will idle but the revs increase/decrease as if it is hunting.
If I increase the revs it will backfire intermittently and randomly through all 4 inlets.
It will Rev but sounds decidedly rough.
I have so far,
checked fuel pressure, was 43psi, I have since fitted a inline gauge to make sure it maintains pressure, it does.
Changed the plugs, they do now apear sooty, I was expecting to see lean?
By passed the power commander, no change.
Done a compression test, 180-180-190-180.
Checked for any vacunm leaks, cannot detect any.
I'm stumped, before I take it to a shop any ideas what I can try?
Thank you in advance, Jon.
Euston we have a problem.
I run a gen 1 stock engine installed in a car, it as ran faultlessly since installation 2 years ago.
During a track day it all of a sudden lost power and ran rough, it was towards the end of the day so I trailered up and sulked all the way home.
Symptoms,
it is difficult to start, almost as if timing is advanced.
It will idle but the revs increase/decrease as if it is hunting.
If I increase the revs it will backfire intermittently and randomly through all 4 inlets.
It will Rev but sounds decidedly rough.
I have so far,
checked fuel pressure, was 43psi, I have since fitted a inline gauge to make sure it maintains pressure, it does.
Changed the plugs, they do now apear sooty, I was expecting to see lean?
By passed the power commander, no change.
Done a compression test, 180-180-190-180.
Checked for any vacunm leaks, cannot detect any.
I'm stumped, before I take it to a shop any ideas what I can try?
Thank you in advance, Jon.