Car back to running like sh!# - ZR-1 Net Registry Forums

LGAFF · 04-16-2009

Car ran great Sunday, today shudders above 2500.

less than 40 miles on new

pumps
coils-Wells/Autzone
fuel pump

Place your bets.... Car runs at low rpm and idles fine.

-=Jeff=- · 04-16-2009

Bad gas? No gas?

shudders how about 2500??

Change plugs and Wires yet?

Maybe loose nut behind wheel?

jonszr1 · 04-16-2009

sorry to hear its being a piece of sh!t. but if i had to bet ,i would say iyou could have a vacume leak in the secondary spyders .ie one of the ball ck valves leaking.or maybe some trash is clogging a injector .hope you find it .

LGAFF · 04-16-2009

I changed the fuel filter also......and yes it is on correctly!

GOLDCYLON · 04-17-2009

Block the air horn with a flexable folder while running and tell us what happens next Lee.

LGAFF · 04-17-2009

Idles too good for a vac leak.

GOLDCYLON · 04-17-2009

Quote:

Originally Posted by LGAFF

Idles too good for a vac leak.

Injector?

Kevin · 04-17-2009

yeah the more i think about it the duct isn't the problem...I know I jumped to conclusions with keiths car so i didn't want to do that again. the injectors should be between 12-16ohm if i remember correctly. Why did you replace the coils?

-=Jeff=- · 04-18-2009

So I assume, when cold runs great then once the car warms up the issues start?

LGAFF · 04-18-2009

No, runs like crap from the get go.

04-16-2009	#1
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,180	Car back to running like sh!# Car ran great Sunday, today shudders above 2500. less than 40 miles on new pumps coils-Wells/Autzone fuel pump Place your bets.... Car runs at low rpm and idles fine. __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359

04-16-2009	#2
-=Jeff=- Join Date: Jul 2007 Location: Bartlett, IL Posts: 7,156	Re: Car back to running like sh!# Bad gas? No gas? shudders how about 2500?? Change plugs and Wires yet? Maybe loose nut behind wheel? __________________ 1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Shelby Series 1 - Wilwood Brakes Custom Interior NCM Lifetime Member #978

04-16-2009	#3
jonszr1 Join Date: Sep 2006 Location: lone pine and mammoth lakes Posts: 1,406	Re: Car back to running like sh!# sorry to hear its being a piece of sh!t. but if i had to bet ,i would say iyou could have a vacume leak in the secondary spyders .ie one of the ball ck valves leaking.or maybe some trash is clogging a injector .hope you find it .

04-16-2009	#4
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,180	Re: Car back to running like sh!# I changed the fuel filter also......and yes it is on correctly! __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359

04-17-2009	#5
GOLDCYLON Join Date: May 2007 Location: Peoria, AZ Posts: 9,120	Re: Car back to running like sh!# Block the air horn with a flexable folder while running and tell us what happens next Lee. __________________ GOLDCYLON - 91 ZR-1 #2014 GOLDCYLON - 90 ZR-1 #2794, 4L60e (Formerly Schrade's) GOLDCYLON - 11 CTS-V Arizona State Director 91 WHITE/BLACK #2014. 380 P&P&PCed,Ported Heads, Jeal Long tubes, Corsa Exhaust/FIKSE FM-5s /LED TLs, LED Headlights, Front Wilwood 6 piston narrowlite calipers and rear Wilwood caliper street shop mod,CNCed Coolant Pipes,TPI Cvr,Filter cover,Stainless Bolts, DRM/DOM PROM /ZFDOC mod build #102,DRLs,BMAD with stainless Debris Screen,Coplan Air Blaster, Pioneer APP Radio 4,Brey-Krause HB,Sub Bar,Fire extinguisher seat mount,DRM Coilovers,LEDs everywhere,Compass mirror (orange),V1 DIC hidden display, Homelink sun visor, Carbon Fiber top x3 and APSIS Carbon Fiber interior, APSIS CF Steering Wheel/NAPA Leather, Banski trailing arms, Guldstrand front suspension,urethane bushings from Prothane (total suspension) ZFDoc drive shaft safety loop, raptor shift light (orange),AO engineering louver front plate, Console seat cushion, 96CE seats with black custom Sheepskins, ss billet catch can,Viper remote entry/alarm,Cragar Rear Louvers,LED side louver lights, Dewitts Radiator with SPAL fans and a Woods 160 T-Stat 90 RED/BLACK #2794. 4L60e Automatic Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless Headers, Corsa Exhaust, SAN Secondaries and Haibeck PROM, Exotic Muscle Coil overs, LED Interior Lights, LED Tail Lights, LED Headlights, 94 Sport seats with black custom Sheepskins , Cragar rear louvers, GS Front calipers, Banski Trailing arms, APSIS Carbon Fiber steering wheel, Front and Rear Baer Eradispeeds, DRLs, Guldstrand front suspension,urethane bushings from Prothane (total suspension), Dewitt's Raditor with Dual SPAL fans and a Haibeck 170 T-Stat 11 RED/GREY CTS-V

04-17-2009	#8
Kevin Join Date: Jun 2005 Location: pittsburgh Posts: 4,624	Re: Car back to running like sh!# yeah the more i think about it the duct isn't the problem...I know I jumped to conclusions with keiths car so i didn't want to do that again. the injectors should be between 12-16ohm if i remember correctly. Why did you replace the coils? __________________ It's not the car, it's the people - Doug Johnson 90 r/r "KEYS ON" nick named "T.L.B"

04-18-2009	#9
-=Jeff=- Join Date: Jul 2007 Location: Bartlett, IL Posts: 7,156	Re: Car back to running like sh!# So I assume, when cold runs great then once the car warms up the issues start? __________________ 1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Shelby Series 1 - Wilwood Brakes Custom Interior NCM Lifetime Member #978

04-18-2009	#10
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,180	Re: Car back to running like sh!# No, runs like crap from the get go. __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359