struggle when accelerating, choking?

[henrytad]

hey everyone.
i have a vz alloytec 3.6, has 196,000km on the clock, with a k&n filter and catback exhaust. lately i have noticed, when im revving especially when going uphill, the engine is almost struggling and keeps jerking until i put my foot all the way down and push. i had a few people tell me it has to do with the throttle control..
can anyone share any light on what it could be?

 

[Benboy]

What is the service history of your car?

Have you checked the fuel filter(s), have you ensured that the air intake is clean and no rubbish in/on the filter, have you checked the M.A.F. (Mass Air Flow meter), when did you last change spark plugs, has the problem appeared not long after you re-fueled the car. Perhaps someone poured something (nasty) into your petrol tank. Have you upset any of the neighbours recently? Before sending the car into a workshop make sure that all aspects of intake and combustion are set to or performing to manufacturers specifications. That's probably one of the first things a workshop will do.

 

[andyman]

how much oil is in your filter? air flow meter could possibly be coated with residue from the filter,

 

[henrytad]

last service done about 4000km ago, did new k&n filter, carby cleaned the engine, new oil/fuel filters.
i havent changed the plugs in over 40,000km, could that be related?

 

[LexVZute]

I had a similar problem recently, found that one of the coil packs and spark plugs was faulty.

 

[henrytad]

How much did it cost you?

 

[morphix]

I've got the same symptoms as you... up hill it feels like its jerking a little.. and you have to put your foot down more to get it to go.

Spark plugs are around 15,000km old.. but no way i can be certain if a coil pack is faulty...

Anyone have a 100% definitive way to confirm if a coil pack is causing an issue?