1992 ZR1 Seems Sluggish - Page 2 - ZR-1 Net Registry Forums

KJL · 07-07-2016

Please do! A pair? there are two pumps? My plan is to ultimately go through the top end and replace all the fuel rail seals and fix any vacuum issues. May do some top end porting as well. The injectors are original I believe so I may upgrade those too. At the moment trying to finish up my 95 project involving changing the rear gears to 4.10 and swapping over to a light weight RAM dual clutch set up.

How do you like the 4.10 gears? I hear the lightweight flywheel can be noisy buy I added a thicker counter shaft shim as recommended by Bill Boudreau including his C-Beam plates. It has been a fun project but I am ready to get it done. Everything else has been done to it except secondary system removal. I am in the process of registering the car in a county that does not require emissions testing so I am planning on pull all that stuff out as well now.

dredgeguy · 07-07-2016

Yes a pair, primary and secondary. If the injectors are original, that is for sure must be done. When I purchased my car in CT it was fine on the test drive and then driving down to MD it started stumbling on the NJ Turnpike. I was lucky to limp home, 7 out of 16 injectors were dead. Thanks to Wazoo, all worked out.

RussMcB · 07-07-2016

I have a spare ECU you can swap in for a quick test. Send me an email if you'd like to get together to try that.

KJL · 07-07-2016

Thanks for the offer! I am going to check a couple more things first. Figured I would just go ahead and replace the spark plugs while I am checking them. Maybe run some injector cleaner in the tank as well. Interesting thought....I guess there are only a finite number of ECMs available for these cars. Probably wouldn't hurt to track down a couple of spares.

What is a good plug to use?

dredgeguy · 07-07-2016

Just remember that injector cleaner will not fix the issue if it is injectors. Ethanol gas will short out the original injectors, ask me how I know

The stainless steel ones from FIC are the fix.

KJL · 07-09-2016

Thanks for the info, decided not to mess with gas additives. So far the problem seems to be getting a little better each time I drive her. I changed out the plugs and the old ones, while old, looked very good. All plugs looked the same. A couple of plugs had oily threads but that is about it. I was reading elsewhere that a bad O2 sensor will also cause issues with lack of power. I would think that would throw a code.....

We Gone · 07-09-2016

Check your O2s.

KJL · 07-09-2016

Yes, I need to do that. I am sure there is a procedure somewhere on this forum for doing this.

dredgeguy · 07-10-2016

Well, Wazoo fixed my issue. The dealer had not connected the small hose going to the MAP and also my throttle cable was messed up so the throttle was 59% when the pedal was all the way to the floor. The dealer has no clue.

Scrrem · 07-10-2016

Glad Jim got it sorted out 👍
Rich

07-07-2016	#11
KJL Join Date: Mar 2013 Location: Roswell, GA Posts: 232	Re: 1992 ZR1 Seems Sluggish Please do! A pair? there are two pumps? My plan is to ultimately go through the top end and replace all the fuel rail seals and fix any vacuum issues. May do some top end porting as well. The injectors are original I believe so I may upgrade those too. At the moment trying to finish up my 95 project involving changing the rear gears to 4.10 and swapping over to a light weight RAM dual clutch set up. How do you like the 4.10 gears? I hear the lightweight flywheel can be noisy buy I added a thicker counter shaft shim as recommended by Bill Boudreau including his C-Beam plates. It has been a fun project but I am ready to get it done. Everything else has been done to it except secondary system removal. I am in the process of registering the car in a county that does not require emissions testing so I am planning on pull all that stuff out as well now. __________________ 1995 ZR1 #159 Ported,Corsa,4.10 Rear, Dual Disc RAM Clutch, Alum Flywheel, Haibeck Chip, ZFDoc Plates, Relocated Battery 400 rwhp 1992 ZR1 #280 Ported, Locked Secondary's, Flowmaster Exhaust, Haibeck Chip, 375rwhp 1996 Collectors LT4 (Stock) 1972 Convertible 434 Small Block 572 rwhp Last edited by KJL; 07-07-2016 at 10:20 AM.

07-07-2016	#12
dredgeguy Join Date: Aug 2012 Location: Ellicott City, MD Posts: 1,639	Re: 1992 ZR1 Seems Sluggish Yes a pair, primary and secondary. If the injectors are original, that is for sure must be done. When I purchased my car in CT it was fine on the test drive and then driving down to MD it started stumbling on the NJ Turnpike. I was lucky to limp home, 7 out of 16 injectors were dead. Thanks to Wazoo, all worked out. __________________ Charlie __________ Dredgeguy WAZOO Member 1992 Bright Red/Black ZR1 #246 Dana 4:10 gears Polished LT5 by Haibeck Polished Fikse FM5's with Michelin Pilot Sport 2 Stainless Works headers and cats with Corsa

07-07-2016	#13
RussMcB Join Date: Jan 2015 Location: Marietta, GA USA Posts: 1,160	Re: 1992 ZR1 Seems Sluggish I have a spare ECU you can swap in for a quick test. Send me an email if you'd like to get together to try that.

07-07-2016	#14
KJL Join Date: Mar 2013 Location: Roswell, GA Posts: 232	Re: 1992 ZR1 Seems Sluggish Thanks for the offer! I am going to check a couple more things first. Figured I would just go ahead and replace the spark plugs while I am checking them. Maybe run some injector cleaner in the tank as well. Interesting thought....I guess there are only a finite number of ECMs available for these cars. Probably wouldn't hurt to track down a couple of spares. What is a good plug to use? __________________ 1995 ZR1 #159 Ported,Corsa,4.10 Rear, Dual Disc RAM Clutch, Alum Flywheel, Haibeck Chip, ZFDoc Plates, Relocated Battery 400 rwhp 1992 ZR1 #280 Ported, Locked Secondary's, Flowmaster Exhaust, Haibeck Chip, 375rwhp 1996 Collectors LT4 (Stock) 1972 Convertible 434 Small Block 572 rwhp Last edited by KJL; 07-07-2016 at 12:08 PM.

07-07-2016	#15
dredgeguy Join Date: Aug 2012 Location: Ellicott City, MD Posts: 1,639	Re: 1992 ZR1 Seems Sluggish Just remember that injector cleaner will not fix the issue if it is injectors. Ethanol gas will short out the original injectors, ask me how I know The stainless steel ones from FIC are the fix. __________________ Charlie __________ Dredgeguy WAZOO Member 1992 Bright Red/Black ZR1 #246 Dana 4:10 gears Polished LT5 by Haibeck Polished Fikse FM5's with Michelin Pilot Sport 2 Stainless Works headers and cats with Corsa

07-09-2016	#16
KJL Join Date: Mar 2013 Location: Roswell, GA Posts: 232	Re: 1992 ZR1 Seems Sluggish Thanks for the info, decided not to mess with gas additives. So far the problem seems to be getting a little better each time I drive her. I changed out the plugs and the old ones, while old, looked very good. All plugs looked the same. A couple of plugs had oily threads but that is about it. I was reading elsewhere that a bad O2 sensor will also cause issues with lack of power. I would think that would throw a code..... __________________ 1995 ZR1 #159 Ported,Corsa,4.10 Rear, Dual Disc RAM Clutch, Alum Flywheel, Haibeck Chip, ZFDoc Plates, Relocated Battery 400 rwhp 1992 ZR1 #280 Ported, Locked Secondary's, Flowmaster Exhaust, Haibeck Chip, 375rwhp 1996 Collectors LT4 (Stock) 1972 Convertible 434 Small Block 572 rwhp

07-09-2016	#17
We Gone Join Date: Apr 2004 Location: ATL. GA. Posts: 2,163	Re: 1992 ZR1 Seems Sluggish Check your O2s. __________________ Steve 1990 Steel Blue/Black #2355 1990 Red/Red #1473 1991 Quasar /Black #118 Sold 1991 Turquoise/Black #766 Parted Out 1993 Yellow/White #179 Sold 1990 Black/Gray #1361 Headers/4:10s Sold

07-09-2016	#18
KJL Join Date: Mar 2013 Location: Roswell, GA Posts: 232	Re: 1992 ZR1 Seems Sluggish Yes, I need to do that. I am sure there is a procedure somewhere on this forum for doing this. __________________ 1995 ZR1 #159 Ported,Corsa,4.10 Rear, Dual Disc RAM Clutch, Alum Flywheel, Haibeck Chip, ZFDoc Plates, Relocated Battery 400 rwhp 1992 ZR1 #280 Ported, Locked Secondary's, Flowmaster Exhaust, Haibeck Chip, 375rwhp 1996 Collectors LT4 (Stock) 1972 Convertible 434 Small Block 572 rwhp

07-10-2016	#19
dredgeguy Join Date: Aug 2012 Location: Ellicott City, MD Posts: 1,639	Re: 1992 ZR1 Seems Sluggish Well, Wazoo fixed my issue. The dealer had not connected the small hose going to the MAP and also my throttle cable was messed up so the throttle was 59% when the pedal was all the way to the floor. The dealer has no clue. __________________ Charlie __________ Dredgeguy WAZOO Member 1992 Bright Red/Black ZR1 #246 Dana 4:10 gears Polished LT5 by Haibeck Polished Fikse FM5's with Michelin Pilot Sport 2 Stainless Works headers and cats with Corsa

07-10-2016	#20
Scrrem Join Date: Feb 2009 Location: Alexandria, Virginia Posts: 1,469	Re: 1992 ZR1 Seems Sluggish Glad Jim got it sorted out 👍 Rich __________________ 1990 Bright Red Coupe #608 380 Stroker, Ported Heads/Intake/Housings/TB Haibeck Secondary Delete Chip / Pete's Cams George Braml Intake / FIC Injectors Coated SW Headers / Corsa Bill Boudreau B/B ZF6 / Viper 4.10 gears Ron Davis Radiator Pioneer AVIC-Z140BH NAV Fikse FM5's 285 / 335 / C6 Brakes WAZOO Member