Hesitation / jerk problem, cruising speed, 03 GD 1.5 vtis manual

[lam.666]

Has anyone come across a problem like this, at a cruising speed (60kms/h) the car hesitates / jerks, the revs don't drop and pretty much happens in all gears as I cruise.

Does not happen when under load like WOT

Have so far cleaned out the air filter, checked the sparks, took the battery out to reset the ECU but still same problem and feels like its getting worst.

Also fuel consumption is shit house at 9l/100km

Would faulty/dirty injectors cause this problem?

Could it be coil packs?

Any suggestions appreciated.

[fillit]

possibly faulty o2 sensor causing a bad mix of fuel + air?

[lam.666]

thanks man, a mech i know suggested coil packs and egr, found these write ups for future reference

http://www.fitfreak.net/forums/fit-diy-repair-maintenance/76064-coil-packs-misfires-some-answers.html
http://www.insightcentral.net/community/viewtopic.php?t=653&start=0
http://www.hondaprelude.to/forums/showthread.php?59722-How-to-Clean-your-EGR-Valve

and one about valve clearances
http://www.fitfreak.net/forums/fit-diy-repair-maintenance/67737-diy-adjusting-valve-lash-clearance.html