Major Engine Miss above 3K - ZR-1 Net Registry Forums

Bob Eyres · 03-19-2012

After sitting for a few months my 91',(60Kmi.), Has got a serious miss in the secondary induction system.
Power key off- It runs normally. Power key on- Engine goes flat above 3K.,gug,gug,gug.
There are no warning lights lit.
I have a Coplon duct insert, so that's not the problem.
Yes, they are the original injectors.

It doesn't take a genius to deduce that the secondaries aren't working, but I'm wondering what the most common causes are for this condition.

It looks like there's a plenum pull in my future. Any way to avoid that?

TIA, Bob.

03-19-2012	#1
Bob Eyres Join Date: Jul 2005 Location: Jupiter, Fl. Posts: 815	Major Engine Miss above 3K After sitting for a few months my 91',(60Kmi.), Has got a serious miss in the secondary induction system. Power key off- It runs normally. Power key on- Engine goes flat above 3K.,gug,gug,gug. There are no warning lights lit. I have a Coplon duct insert, so that's not the problem. Yes, they are the original injectors. It doesn't take a genius to deduce that the secondaries aren't working, but I'm wondering what the most common causes are for this condition. It looks like there's a plenum pull in my future. Any way to avoid that? TIA, Bob. __________________ "It's about the car, not the people." 1991 ZR-1 White/Black #1236 (Owner since 1994). Stock engine with bolt-ons: Hurst shifter,"Forced Air" intake, Coplon duct, Bee Cool Radiator, Demon coils, Jeal prom, Watson headers, X pipe, 3" B&B's, Rippie flywheel, 4:10 gears, A molds, Toyo Proxes-R888's 12.06@117mph. 1.76 60ft.