need some advice....4G15 twin cam problem...

[ron_28]

Good day tuners

So here is my problem,
Have a 4G15 dohc in my ck with a 5fwd gear box
when im driving the car kinda misses an sometimes smokes a lit,
the car doesn't loose much power it still pulls good, an once the car picks up speed
it pulls normal an sounds normal.

Mechanic told me plug wires an distributor cap,

i have changed the plugs, wires, cap an problem is still there

i have noticed oil on spark plug #2

Could this problem be the head gasket?

[Ted_v2]

Nope. Doubt. More than likely it's the seals from the tappet pan cover. They getting brittle and causing the oil to interrupt the current flow to the plugs. Thus causing a misfire

[amitcb12]

Hi guys,I'm having a similar problem.Have a same 4g15 twin cam engine with auto tranny.I getting the same miss as well as loss of power but once it picks up speed it runs normal.Climbing hills is really difficult.Theres also a sound coming from the engine,like if its back-firing.I've taken the car to the mechanic.He says the distributor may be at fault.Any suggestions...