follow up: flywheel still rattles
 

Replaced dual mass flywheel and clutch, Still rattled. Code 44(LH O2 sensor,lean) Replaced O2 sensor,because it was easy,and sometimes it idled smooth sometimes it idled rough ,Still rattling.SO I took it to my southeast ZR-1 specialist.He removed the plennm cleaned all the injectors checked the wires and coils put it back together and it did the same thing.Off with the plenuum again.bench tested the injectors,checked compression(191-201)and then was able to determine that the NO #7 cylinder wasn't fireing all the time.He then found a broken wire 6 inches up the harness that was making contact intermittently.No rattle and the car runs like a scalded dog.Big time Thank You to Aaron Scott of SGC.

Re: follow up: flywheel still rattles
 

Just have to ask....where and what exactly was this wire 6 inches up the harness?

Re: follow up: flywheel still rattles
 

Im assuming the fuel rail harness... Id imagine they get crispy over time.

Re: follow up: flywheel still rattles
 

Oh......you saying a primary injector was not firing vice spark?

Daryll.....got wheels balanced this morning with those new brakes......120mph and no vibration...just have to watch for Combines with 24 row corn heads :D

Re: follow up: flywheel still rattles
 

Yep perhaps or perchance an intermittent electrical queertron

Re: follow up: flywheel still rattles
 

Yea the wire was going to the #7 primary injector. The break was up in the harness about 6 inches where they are all together.