engine lag!!!

[Sv6 Commodore :)]

Hi all, my engine has a slight lag to it while driving, when i hit around the 3 grand mark the engine feels as if it cuts out for a second them comes back to life. Anyone had similer problems with there car??

[loopie]

fuel pump, injectors.or even leads??.best would be for it too be put on a dyno too help find the issue.

[Sv6 Commodore :)]

just had a service, the mechanic said the fuel pump and leads are fine. thanks for your input i'll chuck it over a dyno see what that tells me.

[marc4626]

my car had a similar problem, except it seemed to lag at higher revs, i changed the spark plugs, cleaned the throttle body and intake manifold (both were pretty dirty with a gummy residue, a lot dirtier than i expected) with throttle body cleaner (works really well!!), it took a couple of hours of work but the lag went away and the throttle response was ALOT better. Hope this helps.

[impulsive]

just had a service, the mechanic said the fuel pump and leads are fine. thanks for your input i'll chuck it over a dyno see what that tells me.

Your mechanic is a wank if he said your leads are fine... the coil packs sit on top of the spark plugs no need for a lead between the coil pack and spark plugs.

OP, if you have a cut out (miss) its going to be fuel, air or spark related. Pull your plugs and have a look at them. If they are fouled, replace them. If one is different to the others, it could be a fouled plug or coil related. While your there as mentioned above, give the air intake components a clean. CRC elec component spray is good for the maf, degreaser and WD-40 for the TB.

[Sv6 Commodore :)]

thanks guys. my mechanic ( the wank ) said he sprayed all that and gave it all a clean for me. Funny thing was it got worse after he had it. im putting it into holden today since its a commodore i'll see what they tell me