SR20DET misfire at 3500+RPM

[Psychomoongoose]

I have an SR20 with a 2871 turbo and I cant figure out why its now misfiring. I blew the boost sensing hose off the turbo piping and ever since then, Ive had a nasty misfire after 3500 RPM. I changed the plugs, to no avail. Ive checked all the boost piping, all tight. Im sure its not the MAF being dirty cuz it worked fine before the mishap. Ive checked the coils for cracks or anything out of the ordinary. No dice.. I cant really leave it anywhere to be looked at because Its my only DD. I bought cheap NGK copper plugs, and gapped them to the same as Blacktrax (in San Jose) gapped my iridium plugs at, which was .025.......still shitty. Like I said, it ran AWESOME until the boost hose came off the piping. Now it just sucks. I dont know what to do!!! I feel like ive run out of options.

Maybe different plugs? I dont want to spend money on iridium plugs, I just want my car to be back how it was.....Thanks for reading!!!

[JDMRIDDAZ]

Uh u need to check coilpacks with a multimeter...if there below 1k ohms its bad..
Mines did the same shit and i broke it down to the coilpak and damn i think my boost hose came off before that too..but it was cause of sr engine stabilizer pushing hot pipe loose...check coilpaks it may still werk but not up to factory specs

[jamanrr]

I just got through repairing some nicked up ground wires from my coil packs and one from the block. Also replaced my 02 sensor and she runs a lot better now. Check those things out.

[JDMRIDDAZ]

i just got through repairing some nicked up ground wires from my coil packs and one from the block. Also replaced my 02 sensor and she runs a lot better now. Check those things out.
and hes rite too..

[Psychomoongoose]

Right on guys thanks for the insight. Im going to look over these things asap.

[steve shadows]

Right on guys thanks for the insight. Im going to look over these things asap.

Best me to it!!!

Zilvia is getting smart!!!

Coil Pack Ground wires are usually the culprit.

The little 10 MM bolt that keeps the ground pigtail tight against the head usually comes loose with vibration and is very rarely checked by swap shops

[JDMRIDDAZ]

yeah when i do a sr swap for a customer i put like 3 extra 4ga grounds just fo rgood measure...no probs yet....

[Psychomoongoose]

ONCE AGAIN ZILVIA TO THE RESCUE

Got it guys, it was a broken ground for the coilpacks. Thanks again for all the input. It was a big help!!!

Anyway got the SR out and the LS1's goin in tonight. The SR is going to a friend for REAL cheap and he got a shell for $500.....he is sooooo PUMPED he drives a shitty escort right now with like 50 WHP......now hes got 270WHP.....super pumped

PLEASE LOCK, ADMIN!!!!