Join Date: May 2007
Location: Peoria, AZ
Posts: 9,117
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Re: secondary injector module/ecu
Quote:
Originally Posted by spork2367
Continuation of the discussion from the for sale thread:
What does the secondary injector module actually do?
As determined by Marc's testing, all ECU's are interchangeable with the correct PROM. Which would lead me to believe that either the circuitry exists in both ECM's, or it's done entirely through the PROM.
One would think, that with the proper programming, a simple wiring change should be able to eliminate the secondary injector module from the car.
On another note, I have one of the DIYautotune megaquirt LT5 ECUs. When ordered, I had to specify 1990, or 1991+. They cited an internal wiring change between the two. Does anyone know if this is due to the secondary injector module? Why does the stock ECU handle both with a programming change, but the megasquirt requires internal differences to the circuitry?
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The secondary injector modules are present in all ZR-1 s from MY 90-95. They simply moved in the later years to the rear passenger side. This makes sense why the ECM are all backwards compatible because they still have these secondary injector modules. I think they are the same the entire model run with the exception of the first 200 MY 90s for some reason.
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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; 05-02-2018 at 11:14 PM.
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