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Type: Posts; User: DeathTrap

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    I got a ZHP engine somewhat locally. I'll tear it...

    I got a ZHP engine somewhat locally. I'll tear it down, inspect it, refresh it and slap it in. The original engine will be modified for more NA power... that's going to take a while lol.

    Sent from...
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    I wish! Lol...

    I wish! Lol
    https://uploads.tapatalk-cdn.com/20200118/50c5f6591e0eac0ee226405c8ff74e14.jpg

    Sent from my Pixel 2 XL using Tapatalk
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    It was probably opening fine...the closing part...

    It was probably opening fine...the closing part is questionable.

    Sent from my Pixel 2 XL using Tapatalk
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    I found the root of this issue in the form of a...

    I found the root of this issue in the form of a broken keeper on cylinder #6https://uploads.tapatalk-cdn.com/20200116/b0a3c9c50bc1a08adcbe353f656380cc.jpg

    Sent from my Pixel 2 XL using Tapatalk
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    She died on me today as I took her to redline in...

    She died on me today as I took her to redline in third. I was on the highway, airing it out, hit the rev limiter and got the same misfire code/symptoms as before. I'm thinking in my head that the...
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    I would say so. That and/or a combo of clogged...

    I would say so. That and/or a combo of clogged cats.

    Sent from my Pixel 2 XL using Tapatalk
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    Headers installed. The power is back and after a...

    Headers installed. The power is back and after a few pulls, no misfire. She's young again!

    I'll run the car for a week, if the misfires do not return, we can consider this case solved.
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    Racer, I believe I have clogged cats as well....

    Racer,

    I believe I have clogged cats as well. My ZHP spits out a lot of soot sometimes. I had my wife rev the engine to 2000 rpms, I put my hand by the tail pipe and the amount and pressure of the...
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    Fixed my fuel trims and MAF readings by...

    Fixed my fuel trims and MAF readings by tightening up the MAF pins, still didn't fix the misfire but I'll tighten up my other pins (coil, injector, DME) and see what happens. Compression is good,...
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    Bump. My misfire trigger RPM has decreased...

    Bump.

    My misfire trigger RPM has decreased from ~6k, to around 4.5k.

    Notes:
    + I have a seriously negative fuel trim at around idle and constant throttle

    + O2s and cats are still old

    +...
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    Guess what decided to show up... I guess I'm...

    Guess what decided to show up...

    I guess I'm not done yet

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    That's a negative. My car is bone stock, and the...

    That's a negative. My car is bone stock, and the clutch was replaced many years ago according to the Carfax.

    Luckily I have not had this issue reappear since I repaired my ECT sensor harness. Time...
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    Ahhh. Good to see someone much smarter than me...

    Ahhh. Good to see someone much smarter than me already on the case. Seems like we have the same thought process, which is good.

    I posted in his thread, might shoot him a PM as well. Thanks!
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    Cylinder #6 Misfire, only at ~6krpm

    Starting this thread with things that I've already replaced:
    Spark Plugs
    Coil Packs
    Fuel Filter and hoses
    VANOS seals
    DISA O-ring

    Seems to mostly happen in 3rd gear at around 6000 rpm. It's...
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