robbs10ext

Hi i hope some one out there can help me. I have a 4.3 manuel chevrolet s10. i am having problems with my truck. I keep experiencing a missfire when under light throttle load. I can be cruising down the road and go to pick up speed again and around 2-3000 rpm i get a missfire and load pops and bangs out the exhaust. if i push harder on the throttle it will clear and will be ok and drive alright. It just seems to happen when i am on light throttle. If any one has any ideas i will be greatfull

Thanks

terravast4

iTrader: (25)

bad/clogged cat ?

Revolutionary

iTrader: (6)

I am actually going though something similar right now 5 speed 4.3 no cat at all. in an 01

I logged the misfires to cyl 1 and 4 only between say 1000-2500 rpm at part throttle at WOT it goes away.

I am thinking it might be the injector spider going.

If I find an answer I will post back

fastjweb

iTrader: (2)

its the fuel spider under the intake manifold, the poppets are sticking

viciousknid

iTrader: (8)

check the o2's

Fireman31

check for a bad MAF sensor also........