The truck is a 98 12v, all stock except 3200 GSK and SDX 1 injectors installed around 400 miles ago. Truck ran like a top right after the injector install and the GSK preceeded the injectors.

No smoke, white or black under normal driving conditions
While bleeding injectors two injectors dramatically affect engine rpm, two would drop engine rpm, and two wouldnt cause any change in engine rpm at all.
Engine kept up the same symptoms after bleeding all injectors
Serviced the fuel filter and still same symptoms.
Engine seems to smooth out with throttle, no load engine doesnt "smooth out" until 1,500 but in reality i figure the momentum of the engine is just carrying it past the "dead cylinder"
While bleeding the injectors fuel volume seemed to be even.
Throttle response is excellent and start up is effortless. (first turn of the key within 3-5 sec)
Problem seems to be amplified once its warm.

Only thing i can think of is, lift pump(low fuel pressure), sticky barrel, or delivery valves
i think that covers everything, open to suggestions and thank you in advance.

 

dose it make any sounds at idle kinda like a miss?

we fought this same kinda issue and it was due to 1 injector flowing less fuel than the others it poped off great like the others and you could not cancel out the bad cylinder it was a PITA

might something to try swap in a set of good running injectors

 

That's fantastic... 650 bucks and in less than 400 miles these injectors are going out. Glad we didn't ship the cores back. Will put the stock ones back in, get a refund and take our business elsewhere. Thanks for the heads up. I thought about the injectors but I was hoping the injectors were ok since there isn't any dramatic smoke, white or black.

 

I haven't heard it personally except over the phone. It's been described as a tick but when I heard the exhaust it was a definite dead cylinder.

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the truck is a daily driver and primary source of transportation. it hauls light loads in the box only. i know running on a dead cylinder isnt good, just hoping it isnt going to cause anything catostrophic.