Cruise Control Cutting Off Vacuum Question - ZR-1 Net Registry Forums

BigIke · 02-23-2019

For a year or two my cruise has been acting up. Now that my secondaries are deleted and the injector housing gaskets are new, I'm pulling 20"s of vacuum at idle, and the LT5 doesn't hunt at all.

I checked the cruise servo for tightness and packed dielectric grease in the connector, but that didn't help and the screws were not loose.

Inspected vacuum at the same servo and there's only 10"s there.

Seems like this is the issue. Can someone confirm on a car with working cruise control, what is your vacuum?

Taking the Juan to Louisiana today to go offshore, buying new wipers and I'll replace the vacuum hose to the vac canister.

Thanks, need my Cruise, don't want to be like every a hole on the road that can't pick a speed...

Sent from my SM-G960U using ZR-1 Net Registry mobile app

BigIke · 02-23-2019

Found the issue I think. The plastic vacuum tube was cracked at the power steering bracket. Pulled the broken piece off and connected the tube to it, hopefully I'll get to drive it to the heliport...

I say that because at the parts house I got the no start issue again. Hopefully I'll get enough money for new gaskets, starter, and coil packs from this job. Push started so it has to be the starter not the clutch switch

Sent from my SM-G960U using ZR-1 Net Registry mobile app

02-23-2019	#1
BigIke Join Date: Aug 2014 Location: Montgomery TX Posts: 263	Cruise Control Cutting Off Vacuum Question For a year or two my cruise has been acting up. Now that my secondaries are deleted and the injector housing gaskets are new, I'm pulling 20"s of vacuum at idle, and the LT5 doesn't hunt at all. I checked the cruise servo for tightness and packed dielectric grease in the connector, but that didn't help and the screws were not loose. Inspected vacuum at the same servo and there's only 10"s there. Seems like this is the issue. Can someone confirm on a car with working cruise control, what is your vacuum? Taking the Juan to Louisiana today to go offshore, buying new wipers and I'll replace the vacuum hose to the vac canister. Thanks, need my Cruise, don't want to be like every a hole on the road that can't pick a speed... Sent from my SM-G960U using ZR-1 Net Registry mobile app __________________ 1991 White ZRJuan #1616 Mileage: 56K Sept-14 -- 113k May-18!!! God Damn I Love This Car!

02-23-2019	#2
BigIke Join Date: Aug 2014 Location: Montgomery TX Posts: 263	Re: Cruise Control Cutting Off Vacuum Question Found the issue I think. The plastic vacuum tube was cracked at the power steering bracket. Pulled the broken piece off and connected the tube to it, hopefully I'll get to drive it to the heliport... I say that because at the parts house I got the no start issue again. Hopefully I'll get enough money for new gaskets, starter, and coil packs from this job. Push started so it has to be the starter not the clutch switch Sent from my SM-G960U using ZR-1 Net Registry mobile app __________________ 1991 White ZRJuan #1616 Mileage: 56K Sept-14 -- 113k May-18!!! God Damn I Love This Car!