As long as the leak is before the maf you'll be ok

 

93 z28 does not have a maf. only map.

 

Headers were installed back in December. Just started doing this recently. I'm not too worried about because like I said, only does it in Park and Neutral. I'll clean and check the TPS when I come home this weekend. Header gasket doesn't sound like it's leaking...but hard to tell because the rockers tick a bit.

 

iac idle air control valve/motor is what gets dirty. its under the tps.

 

All right. I'll clean that out too. Might just take the whole TB off and give it a good cleaning.

 

its way easier to get the iac out with the tb out. im not sure it will come out otherwise. dont get carried away on the tb inside,,, where the butterflys touch, some tb will have a slitely textured or coated looking area there that keeps the butterfly from sticking against the walls. anyways yeh get all the crud outa there. check the intake manifold bolts for tightness. they dont torque out that much and over time and or running hot a time or two the gasket can colapse leaving the bolts lose. with new gasket the torque specs are 35ftlbs so again just check to make sure there not lose. check at the front seal of the intake to see if your losing oil there, common failure point on the lt1. rear is more so. heck pick up some injector o rings and put them on as well. need 16 if you do upper and lower o rings. very inexpensive.

 

Thanks Craby. As far as leaking oil, last time I checked it was good in all spots but will check again. I have a extra TB gasket at home so might as well take it off and clean it up some. I just don't like the stupid paint job the PO attempted to do any ways.