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#21 |
Join Date: Oct 2004
Location: Folsom CA
Posts: 1,648
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Ran into a problem similar to this a few years ago.
The short story is, in testing fuel injectors I had stuck my Volt Meter probe into the female sockets of the ECM plug and in doing this I had stretched out the connectors such that they didn't make good contact with the male ECM pins any more. http://www.zr1.net/forum/showthread.php?t=10828 Maybe, just maybe, somewhere along the way somebody did something similar to your ECM plug. 'Crabs
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TomC '90ZR1 #792 Honorary Pirate [B]If it ain't FUN, you're doing something terribly WRONG. [/B] |
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#22 |
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Location: Peoria, AZ
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Secondary driver modules is another place to check since she is a 91?
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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 Last edited by GOLDCYLON; 12-18-2012 at 08:11 AM. |
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#23 | |
![]() Join Date: May 2005
Location: Nichols, FL
Posts: 615
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Tyler
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#24 |
![]() Join Date: Jan 2009
Location: Portland Oregon metro area (Washington side)
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If you have spark..... yes pursue the fuel angle.
Maybe your authorized cheby dealer put the wrong injectors in? Or otherwise did not get the connectors on right on the injectors? Time to get dirty my friend. Or find a friend that works the tools for you. Bottom line is you have a ZR-1 that is ill and we want it back on the road healthy. ![]()
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Scott ![]() Vett owner since 1979._It's about the car and the people |
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#25 |
![]() Join Date: Dec 2004
Location: Jacksonville, FL USA
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I know that this is off the wall....but after an injector r&r on Jim's car, I may be wrong on who owned the car, a miss developed. It got tracked down to a pinched wire in the injector harness. I think it got pinched between the I/H and the plenum upon reassembly.......just thought I'd toss that out there.
Mr. DeWild also said the same thing about our DIS modules when I bought a spare from his stock pile of LT5 parts.....just a fwiw. ![]() Tom
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#26 |
Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,697
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scottfab,
I emailed a friend, whom I respect a great deal, about the DIS module. Here is his response regarding the dead short coil "Dominic, The shorted coil will put a large load on the driver. Even current limited, with the coil shorted it won't take any of the load. The entire load will be in the driver which will cause it to heat up excessively." So you were correct with your assessment although I'd still consider the likelihood to be negligible.
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#27 | |
![]() Join Date: Dec 2003
Location: Chicagoland,IL
Posts: 2,680
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Jason,since you tried IM and ECM with no luck then i have 2 questions Where/who's injectors did you buy/install? I have found a few stock new injectors that were bad. The pinched wire is also very doable. What coils did you buy/install? There were issues with some performance aftermarket coils. I know it's frustrating but trust me it's something silly. Pete
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'91 #1635 PoloGreen 350 LT5 11.09 @ 129.27 11.04 @ 128.86 474RWHP 400RWTQ http://www.youtube.com/watch?v=SFNFOhGGlR4 http://www.youtube.com/watch?v=ZlRIOMwaDYY https://sites.google.com/site/peteszr1garage Last edited by Pete; 12-19-2012 at 01:52 AM. |
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#28 |
Join Date: Mar 2006
Location: Denver, CO
Posts: 124
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I thought that the injectors were RCs, but they actually came from Fuel Injector Connection. The coils are factory and were bought from the dealership.
#4 and #7 have no spark for certain. I was reading further through the FSM tonight (Chart C-4) and it seems like the diagnostic flow goes quickly to a faulty ignition module. I’m a novice (at best), but I can see where if someone wasn’t thorough they might jump to this faulty ignition module conclusion. Thanks for the ideas you guys are providing here. There’s a lot to be looking for that could be simple and I really hope it is at this point. Jason
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1991 Quasar Blue ZR-1 |
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#29 |
Join Date: Mar 2006
Location: Denver, CO
Posts: 124
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Tyler, I also meant to mention that I reached out to Rod DeWild today and left him a message.
LGAFF, you mentioned this guy as well Saturday when we talked. I was thinking of someone else when I mentioned that I thought I knew him. Thanks, Jason
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1991 Quasar Blue ZR-1 |
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#30 | |
Banned
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Join Date: Oct 2006
Location: MD
Posts: 3,690
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You should be able to see the injectors without pulling the plenum. ![]() David |
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