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01-22-2013
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#1 |
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Join Date: Jan 2013
Location: lancaster, ohio
Posts: 5
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90 zr1 no start
Have replaced ignition module under intake and had ecm re-built, car will run on carb cleaner, I have checked all fuse and ohmed injectors between fuse and ecm with all reading between 12 and 12.4 ohms. I have no idea what to check from this point? Also vehicle has no codes and data all appears to be correct??
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01-22-2013
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#2 |
  
Join Date: Jun 2005
Location: pittsburgh
Posts: 4,632
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Re: 90 zr1 no start
fuel
air spark which isn't the car getting? are the fuel pumps good?
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It's not the car, it's the people - Doug Johnson 90 r/r "KEYS ON" nick named "T.L.B" |
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01-22-2013
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#3 |
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Join Date: Jan 2013
Location: lancaster, ohio
Posts: 5
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Re: 90 zr1 no start
good fuel pressure on gauge, has spark or wouldnot run on cleaner.
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01-22-2013
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#4 |
 
Join Date: Jan 2009
Location: Portland Oregon metro area (Washington side)
Posts: 3,207
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Re: 90 zr1 no start
Somebody put something other than fuel in the tank? water?
Using the fuel rail (and being very careful) drain some out.
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Scott  Vett owner since 1979._It's about the car and the people Last edited by scottfab; 01-22-2013 at 04:34 PM. |
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01-22-2013
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#5 | |
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Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,708
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Re: 90 zr1 no start
Quote:
I'm skeptical that it is actually idling. The ignition module provides the start up control until 400rpms and then the ECM takes over. What is good fuel pressure? > 47psi?
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[SIGPIC][/SIGPIC]Former Membership Chairman Former ZR-1 Registry - BOD 1972 Corvette 4speed base Coupe SOLD long time ago 1984 Corvette Z-51/4+3 SOLD 1992 Corvette ZR-1 Aqua/Gray #474 SOLD 1992 Corvette ZR-1 Black Rose/Cognac #458 2014 Honda VFR Interceptor DX |
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01-22-2013
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#6 | |
  
Join Date: May 2007
Location: Peoria, AZ
Posts: 9,155
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Re: 90 zr1 no start
Quote:
How many pounds of fuel pressure are you seeing at the rail exactly ?
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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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01-22-2013
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#7 |
Join Date: May 2007
Location: Westminster, Maryland
Posts: 3,689
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Re: 90 zr1 no start
Was any maintenance or repairs done to the car since the last time it started properly?
Jim
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If it isn't fun, you aren't doing it right! 1990 Black ZR-1 - sold 1993 Quasar Blue ZR-1 1994 Competition Yellow ZR-1 1995 Dark Purple ZR-1 Maryland State Coordinator WAZOO Member |
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01-22-2013
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#8 |
Join Date: Dec 2003
Location: Arcadia,OK
Posts: 3,394
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Re: 90 zr1 no start
Sounds like ECM is not getting signal from eith cam position sensor or crank position sensor. If no signal then no command to injectors for pulse.
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Jerry Downey JERRYS LT5 GASKETS & PARTS http://www.jerrysgaskets.com 1994 ZR-1, Black/Black, Lingenfelter Aerobody, 416cu in, 3.91 gears, coil-over susp, Brembo brakes, etc. 2016 Black-Red, 3LT-Z51 Auto 8-speed. |
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01-22-2013
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#9 |
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Join Date: Dec 2012
Location: NC
Posts: 1,786
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Re: 90 zr1 no start
Welcome onto the boards there...
How LONG does it hold fuel pressure? Static pressure (and bleeddown time) is WAY more important than dynamic pressure... |
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01-23-2013
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#10 |
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Join Date: Jan 2013
Location: lancaster, ohio
Posts: 5
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Re: 90 zr1 no start
I have 47-48 psi that hold well, when innitially crankling I get 1 injector pulse and it may pulse once in a blue moon while cranking.
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