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AL
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NOV 29, 02:41 AM
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My ecm fried up and I bought a refurbished ecm but I can’t get it to work, checked connections and put in my prom in it but it doesn’t work, what can I check that may affect ecm from working properly. ------------------
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Dennis LaGrua
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NOV 29, 09:22 AM
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What symptoms are you experiencing? Have you done an ECM scan? How did you determine that the ECM was not functioning?
FYI, refurbished ECM's seldom come with the prom chip. Did you check if your ECM has one?------------------
" THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Spintech/Hedman Exhaust, P-log Manifold, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, Champion Radiator, S10 Brake Booster, HP Tuners VCM Suite.
"THE COLUSSUS"
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "
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AL
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NOV 29, 02:24 PM
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No code 12 or any and yes I did transfer my prom to the new one, even when I open the key the light doesn’t come on, the light works but it seems the ecm doesn't activate it , I crank the car and I don’t here the fuel pump prime, but after a couple cranks it primes but it doesn't spray fuel in the throttle body, I have spark and all but it seems the ecm isn’t activating, can a relay stop the ecm from functioning?
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theogre
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NOV 29, 08:42 PM
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ECM has 2 power feeds...
1 fuse in fuse box.
1 fusible link in engine bay w/ disconnect to reset "codes." Goes to "box" under C500 for 85-88 Fiero.
Either "dead" then ECM not working.------------------
Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should.
(Jurassic Park)
The Ogre's Fiero Cave
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AL
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DEC 08, 08:26 AM
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Does the disconnect wire have power when you disconnect it, at all time or when you open the key? ------------------
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fierosound
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DEC 08, 03:02 PM
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| quote | Originally posted by AL:
Does the disconnect wire have power when you disconnect it, at all time or when you open the key?
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That's always "hot" so ECM remembers what it's learned.
That's the disconnect to clear stored error codes.
After that, the ECM has to relearn idle etc. as you drive.
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My World of Wheels Winners (Click on links below)
3.4L Supercharged 87 GT and Super Duty 4 Indy #163[This message has been edited by fierosound (edited 12-08-2020).]
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AL
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DEC 08, 05:55 PM
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That could be my problem gonna have to check it after work, thank you ------------------
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