Update on my hi-miler Z project

[VetteMed]

Update: Approximately 1200 miles on the new motor.

I was still experiencing a rough idle, so I sent the injectors off to FIC for inspection. Jon said they were dirty, but functioning well. Cleaned and returned (no charge!).

Reinstalled the injectors, unfortunately no real improvement in idle. Also had spotty cruise control function. This culminated in the day where I had 3 backfires upon startup, out of about 6 or 8 startups that day. Also only had airflow through the defog ducts. Off with the plenum once more.

Found the large diameter vacuum hose disconnected from the check valve. This supplies vacuum to the HVAC system and the cruise control system. Reconnected, along with a ziptie and some silicone adhesive.

Still had that nagging rough idle... until I realized the sloppy fit of the brake booster hose at the plenum nipple. I fit a hose clamp there, snugged it down, and voila, smooth idle!


I've also done some interior work. Today's project was a new headliner, since the original was sagging and hitting my head.

Removed the original:


Simple green, Goo-Gone, a scraper, and some good ol' elbow grease, to remove the residual adhesive:


Clean and ready for new liner:



continued....