1999 lanos

[kiwimayhem]

Hi

Ive got a 1999 1.5 lanos and recently when i give it the gas it runs like its running on 3 cylinders
it starts fine, idles fine, drives fine till you get to about 80 and put your foot down then it goes to the pack...button off the gas and it comes back right again

HELP

thanks

Dean

[MMamdouh]

how old is your spark plug leds?

is your fuel pressure too low?

MMamdouh

[kiwimayhem]

spark plug leads are about a year old,as are the plugs...ive put in injector cleaner but still the same thing happens when you put your foot down

[kiwimayhem]

ive changed the fuel filter, running a K n N pod filter, big bore exhaust................

[MMamdouh]

what happens when you floor it while going at 30KPH with 3rd gear engaged?

MMamdouh

[kiwimayhem]

when you floor it from 30 km in third gear you get to 80 and it does the same thing, chuck it into fourth and still the same till you button right off the gas and it comes right again....it did roughly the same thing today when i was driving up a hill, went from fourth to third with my foot down to keep going up the hill and it started slowing down and sounded like it was running on 3 cylinders again

[MMamdouh]

seems like an issue with your ignition... replace the spark plug leds and spark plugs

MMamdouh

[RichieOzzie]

fuel pump or thick oil in engine.

[kiwimayhem]

replaced leads and plugs at a small fortune but car still performs like a sack of shit.....