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#11 |
Join Date: May 2005
Location: Leesburg, VA
Posts: 2,713
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How was the fuel pressure? What did the #1 plug look like? You might also check the FPR's vacuum line to see if there's gas in it.
You can buy a spark tester for like $10, they sort of look like a spark plug but with a weird end. I wouldn't think only one cylinder down would be as bad as the symptoms you are describing.
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Bob Saveland Former owner of #2517 [IMG]http://a.random-image.net/aurora40/vette.jpg[/img] |
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#12 |
![]() Join Date: Jan 2007
Location: Florida
Posts: 241
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If it is the injectors they must be in very bad condition. When I pulled mine for the porting my secondaries were very corroded, but my ZR1 ran very good and never burped once.
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#13 |
![]() ![]() ![]() Join Date: May 2007
Location: Peoria, AZ
Posts: 9,153
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Mine were rusty as hell as well. Wont happen with RCs as they have a stainless steel insert.
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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 |
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#14 |
Banned
BANNED
Join Date: Oct 2006
Location: MD
Posts: 3,690
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Injector #1 was bad...
Jim said from day 1 what it was and sure enough! ![]() ![]() ![]() ![]() ![]() |
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#15 | |
![]() ![]() ![]() Join Date: May 2007
Location: Peoria, AZ
Posts: 9,153
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Actually I did in post #2 but hey its up and running. But I would still my FUs complete set
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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 |
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#16 |
![]() Join Date: Mar 2004
Location: Found Member
Posts: 4,346
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Thanks for the mention Daryll
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Frank Urbo. NCM Lifetime member # 982 Registry Founding # 237 |
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#17 |
![]() Join Date: May 2007
Location: Westminster, Maryland
Posts: 3,687
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Follow up on the problem:
The symptoms were: loss of power, rough, stumbling operation, stalling at idle, hard to start, and white smoke at the exhaust that smelled like gasoline. Pulling spark plug wires showed no change in rough idle for #1 plug wire. All other plug wires made the idle worse. Fuel leak down test: ignition key to on, fuel pressure steady at about 50 psi. Ignition key to off, fuel pressure immediately dropped to zero. Pulled the Plenum. Turn the ignition key to on, observed fuel squirting from #1 primary injector. We replaced the bad #1 injector with a used injector to get the car running again. Jim |
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#18 | |
![]() Join Date: Apr 2007
Location: Northern VA
Posts: 2,655
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#19 |
![]() Join Date: Apr 2004
Location: Germantown, MD
Posts: 738
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Here's the link from Marc Haibecks website for isolating bad fuel injectors. All you need is a digital multimeter and the ability to follow the instructions. Bob and I used it a little over a year ago. It gives you the ability to determine if any others are on the way out.
http://www.zr1specialist.com/HAT%20W...in%20Place.pdf |
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#20 | |
![]() Join Date: May 2007
Location: Westminster, Maryland
Posts: 3,687
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Jim |
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