sluggish

[jimmythesaint]

hi there just got back from a short trip away,,,and it seems that when my vz is at 80km and i press for excellaration it like shutters or has a flat spot.
its hard to explain seems like shes jumping,,,anyone have any ideas what it could be,,,not sure if it does it of the mark thou felt like it did it once,,
can annyone help,,,cheers..

[pau13z]

Sounds like there's a problem with your air flow, be it a blockage, clogged filter, or dirty AFM, or there's a problem with the fuel system, be it the pump or the injectors (more likely the injectors). It could also be your spark plugs.

Change your sparkys, clean/change your air filter, and use premium (98) unleaded for a couple of weeks, maybe throw in some injector cleaner too. If it's still happening check your AFM and your fuel pump.

[Sv6 Commodore :)]

my car is a tad sluggish aswel, im unsure as to why but even at idle it lags a tinny bit has like a jump in the engine which makes it shake a bit any idea's as to what that could be?? or is it worth doing what was mentioned above. changing sparkys,air filter and some injector cleaner??

[pau13z]

Start with the easy/cheap stuff, air filter, better petrol, injector cleaner. Next I'd check the AFM (Air Flow Meter) which is located between the air filter and throttle body, then I'd check a couple of the spark plugs which are easy to get to without removing the plenum chamber to see how they are. If they're dirty/damaged then I'd replace them, but I'd do that as a last resort because you have to remove the plenum chamber which is kinda annoying. Also, the sparkys are supposed to have like a 100,000 - 120,000 Km life, so unless you haven't changed them in that time they should be fine.

[Sv6 Commodore :)]

havent changed them and the car is at 116000 so its due for a major service