147 JTD slight surging on light throttle low revs
noticed today in the warm weather that my engine is surging very slightly on overrun and light throttle, as if the throttle has been lightly pressed on/off .., very annoying when cruising along at 30 on light throttle with the engine 'jerking' every so often..grr!! and esp when off throttle in gear - slight jerking when slow down..double grr!
I am planning on cleaning out the EGR (been a while..) and checking the vac pipes to the vnt actuator..,..but as this is on light throttle and low revs, I doubt the turbo is involved..
Could it be the TPS on the pedal itself ? or perhaps the brake pedal switch malfunctioning?
any other suggestions?
1.9 JTD M-Jet 16v 140ps.
Gas flowed head, Polished valves, Port matched manifolds, New Turbo.
JS-T primary Decat, MrZ full-bore Center Decat , Oil recirc tank, Big filter conversion.