Ok got a Real good Electrical problem come on in - Page 4 - ZR-1 Net Registry Forums

phrogs · 01-13-2012

Ok See UPDATE in my first post!
From Marc Haibeck

Hi Johnny,

You did a nice job covering all of the possibilities and describing it. I agree that the most likely suspect at this point is the ECM.

I have had good experience with K & B Products for ECM repair.
http://www.kandbcorvetteproducts.com/

They have repaired 5 out of the 6 ECM's that I have sent them. On the one unit we gave up trying to fix it and they did not charge me for a repair.

Best of luck.

Marc

GOLDCYLON · 01-13-2012

How much does the repair service normally cost ?

phrogs · 01-13-2012

Well,

$325 and ten days to fix your ECM.
Comes with a one year warrenty.

VetteVet · 01-14-2012

Quote:

Originally Posted by phrogs

so what signals the ECM to fire the injectors?

something must tell it that it is time to fire. Is it the Camshaft sensor?

I am trying to reduce the possibilities of other things being broken other than the ECM but it looks like it is the ECM all day long..

Johnny,

Synchronous fueling is controlled by the ECM utilizing reference pulses from the ignition module to achieve the correct injector timing. The ignition module utilizes the crank position signal to generate the reference pulses. Sounds like you most likely have a faulty injector driver in the ECM, although it could be anything in the ECM involving that particular injector circuit.

For what it's worth, I am currently in the process of developing a schematic for the 1228331 ECM. I have identified all of the integrated circuits and am working to track all of the circuit board traces and account for the discrete components. I am also building an ECM test bench for ECM hardware and code testing.

My 1991 BFXB code disassembly is coming along quite well. I have over 80% of the variables and tables identified and more than 70% of the code commented. I'm at a bit of a standstill on the code until I can get the test bench finished so that I can identify the remaining I/O ports.

Jep

VetteMed · 01-14-2012

Thanks for posting this update, Johnny. Good to know of an option for ECM repair.

GOLDCYLON · 01-14-2012

Quote:

Originally Posted by phrogs

Well,

$325 and ten days to fix your ECM.
Comes with a one year warrenty.

Thanks Johhny thats good to know. GC

I hope this fixes your issue it nice when members share.. it helps the whole community

Tyler Townsley · 01-15-2012

Quote:

Originally Posted by VetteVet

Johnny,

My 1991 BFXB code disassembly is coming along quite well. I have over 80% of the variables and tables identified and more than 70% of the code commented. I'm at a bit of a standstill on the code until I can get the test bench finished so that I can identify the remaining I/O ports.

Jep

I have a copy of the decodedd GMcalibration for the ZR-1. I have lent it out a couple of times to TodP and Corey H who have a completely commented calibration files for all versions. You might contact them to crosscheck what you have done so far.

Tyler

VetteVet · 01-15-2012

Quote:

Originally Posted by Tyler Townsley

I have a copy of the decodedd GMcalibration for the ZR-1. I have lent it out a couple of times to TodP and Corey H who have a completely commented calibration files for all versions. You might contact them to crosscheck what you have done so far.

Tyler

Thanks Tyler! I haven't had much luck getting anyone to share much of anything. That's why I'm having to reinvent the wheel.

Jep

Corbusa · 01-15-2012

I guess I'm always the one asking the dumb questions. So here goes AGAIN

Has/ does /can anyone shoot a video while working on the injection/ electrical on the ZR's ? I mean if someone could show the removal of the injectors and checking electrical with meters, checking the ECM etc etc Like vettevet is doing ..That sure would help us new people out and keep all of us up to speed .I'd sure buy one.. I guess my thought was people ( in general) are always posting vids. on Youtube. It cant be too hard to do. Thanks

XfireZ51 · 01-15-2012

Quote:

Originally Posted by VetteVet

Thanks Tyler! I haven't had much luck getting anyone to share much of anything.

Jep

Jep,

Looks like you still haven't.

01-13-2012	#31
phrogs Join Date: Jul 2004 Location: Kalamazoo MI Posts: 1,763	Re: Ok got a Real good Electrical problem come on in Ok See UPDATE in my first post! From Marc Haibeck Hi Johnny, You did a nice job covering all of the possibilities and describing it. I agree that the most likely suspect at this point is the ECM. I have had good experience with K & B Products for ECM repair. http://www.kandbcorvetteproducts.com/ They have repaired 5 out of the 6 ECM's that I have sent them. On the one unit we gave up trying to fix it and they did not charge me for a repair. Best of luck. Marc __________________ JOHNNY P Currently own 90 ZR-1 #845 DRM 500 engine package 90 #226 Parts car Hit me up if you need anything.

01-13-2012	#32
GOLDCYLON Join Date: May 2007 Location: Peoria, AZ Posts: 9,120	Re: Ok got a Real good Electrical problem come on in How much does the repair service normally cost ? __________________ 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

01-13-2012	#33
phrogs Join Date: Jul 2004 Location: Kalamazoo MI Posts: 1,763	Re: Ok got a Real good Electrical problem come on in Well, $325 and ten days to fix your ECM. Comes with a one year warrenty. __________________ JOHNNY P Currently own 90 ZR-1 #845 DRM 500 engine package 90 #226 Parts car Hit me up if you need anything.

01-14-2012	#35
VetteMed Join Date: Mar 2009 Location: Orlando, FL Posts: 1,816	Re: Ok got a Real good Electrical problem come on in Thanks for posting this update, Johnny. Good to know of an option for ECM repair.

01-15-2012	#39
Corbusa Join Date: Sep 2011 Location: TN Posts: 577	Re: Ok got a Real good Electrical problem come on in I guess I'm always the one asking the dumb questions. So here goes AGAIN Has/ does /can anyone shoot a video while working on the injection/ electrical on the ZR's ? I mean if someone could show the removal of the injectors and checking electrical with meters, checking the ECM etc etc Like vettevet is doing ..That sure would help us new people out and keep all of us up to speed .I'd sure buy one.. I guess my thought was people ( in general) are always posting vids. on Youtube. It cant be too hard to do. Thanks