High Idle...need ideas - ZR-1 Net Registry Forums

LGAFF · 03-14-2009

Well, I pulled the plenum put it back together, had a vacuum leak.....vac would not hold on the line running from the D/S center of the plenum. Found a leak in the hard line, pin hole, fixed it....put it all back together and still have high idle.

Vacuumm holds on both the pass/driver side plenum inlets. Also vac is holding on the line running from the pump to under the plenum.

Any other ideas, PCVs seem to be sealed. I did replacet the breather hoses, maybe I should check there first.

I also swapped the new IAC form my 92 and no help.

03-14-2009	#1
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,194	High Idle...need ideas Well, I pulled the plenum put it back together, had a vacuum leak.....vac would not hold on the line running from the D/S center of the plenum. Found a leak in the hard line, pin hole, fixed it....put it all back together and still have high idle. Vacuumm holds on both the pass/driver side plenum inlets. Also vac is holding on the line running from the pump to under the plenum. Any other ideas, PCVs seem to be sealed. I did replacet the breather hoses, maybe I should check there first. I also swapped the new IAC form my 92 and no help. __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359