engine lacks power

[mdjr101]

When the engine gets just about warmed up about 170* the engine looses power for about 2-4 min then it runs ok. I can floor the pedal but it just lumbers on till it kinda catches up, it'll run faster but can tell something is missing. Also, below 2k rpm the engine misses, I've isolated it down to #6 cyl. I've replaced the coil, injector and intake lifters, next is the exhaust lifters unless someone can point me in a better direction. The car scoots quite nicely on the highway, but like I said below 2k to idle it will sit there and vibrate and starts off sluggish till it winds up a bit.

Thanks Y'all

[yodawill2000]

Sparkplug ??

You replace the lifters ??Got any codes on the ecu ?

[KUL FIR CHICK N]

My money's on a code 34 knock sensor error. Sounds like my symptom.

[yodawill2000]

cleaning out my rad took care of mine.was driving me crazy.

Knock sensor shouldnt take out a cylinder though .

[mdjr101]

I've replaced the intake lifters, new iridium plugs, no codes on the computer, and seems like all sensed systems are good using a Snap-On 2500 analyzer.

[DominickJ30]

Sound like a fuel injector leaking or spitting too much fuel. Check your fuel system.