Injectors - ZR-1 Net Registry Forums

kengodfrey · 08-03-2012

I have a 1991 ZR1, 19,000 miles. I recently replaced my injectors. I intended to buy RCI injectors, made the call and the salesman suggested I buy another brand; stainless steel, and looked same as originals. Maybe that was my mistake. I changed out the injectors, with the help of Haibecks video. Everything went as planned. When I first started the car, it misfired for a short time, but when I drove it out of the yard, it started running ok. Now, when I first start it up, after not driving it for a while, i get smoke and rough idling. When I take it out and run it, it seems to run ok. Sometimes it runs rough at idle speed, but ok when i speed up. the insides of exhaust are very black, and i get small amount of black liquids dripping out. Any suggestions?
Thanks, IKen

LGAFF · 08-03-2012

did you check the fuel pressure? Are these FIC injectors?

scottfab · 08-03-2012

The drips have got to be condensed water vapor.
Normal.
Do check fuel pressure as has been suggested.

tomtom72 · 08-05-2012

Please don't think me a wise guy, but on a 90 there is that difficult to connect vacuum hose that attaches at the lower right side of the T/B, I'm not too sure where it is on a 91....you got that one on right? Also I'd do a mental replay of connecting all the other vacuum hoses, the MAP hose too.

Your symptoms sound like a vacuum leak to me, JMHO

Tom

08-03-2012	#1
kengodfrey Join Date: Jun 2007 Location: Pensacola, Florida Posts: 14	Injectors I have a 1991 ZR1, 19,000 miles. I recently replaced my injectors. I intended to buy RCI injectors, made the call and the salesman suggested I buy another brand; stainless steel, and looked same as originals. Maybe that was my mistake. I changed out the injectors, with the help of Haibecks video. Everything went as planned. When I first started the car, it misfired for a short time, but when I drove it out of the yard, it started running ok. Now, when I first start it up, after not driving it for a while, i get smoke and rough idling. When I take it out and run it, it seems to run ok. Sometimes it runs rough at idle speed, but ok when i speed up. the insides of exhaust are very black, and i get small amount of black liquids dripping out. Any suggestions? Thanks, IKen

08-03-2012	#2
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,194	Re: Injectors did you check the fuel pressure? Are these FIC injectors? __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359

08-03-2012	#3
scottfab Join Date: Jan 2009 Location: Portland Oregon metro area (Washington side) Posts: 3,207	Re: Injectors The drips have got to be condensed water vapor. Normal. Do check fuel pressure as has been suggested. __________________ Scott Vett owner since 1979._It's about the car and the people

08-05-2012	#4
tomtom72 Join Date: Dec 2004 Location: Jacksonville, FL USA Posts: 4,645	Re: Injectors Please don't think me a wise guy, but on a 90 there is that difficult to connect vacuum hose that attaches at the lower right side of the T/B, I'm not too sure where it is on a 91....you got that one on right? Also I'd do a mental replay of connecting all the other vacuum hoses, the MAP hose too. Your symptoms sound like a vacuum leak to me, JMHO Tom __________________ 1990 ZR-1, Black/grey, #2233, stock. ZR-1 Net Reg Founding Member #316 & NCM member