intermitent jerks... help please?

[tt412]

hey guys,

dont know whats up with my setup, but lately (this month) i've had a few intermittent jerks when going WOT. first one was a few weeks back, after the toll, 2nd gear, 4k rpm, can't remember the boost. then today, i had a few more jerks 4th gear, 5k rpm and 5th gear 4krpm, 0.31bar...

whats going on? the pump can supply enough fuel for a 10:1 afr... everything is stock too. happens with or without the avcr btw

 

[ezwong2002]

change spark plugs.... check spark cable also...

 

[cssm88]

If that doesn't work, check your compression.

 

[tt412]

hmmm okay will look into that, but this doesn't happen all the time wor... so how?

 

[Danny]

last time had similar problem, it was caused by improper fuelling ie. either too rich or too lean.