[CA] 1990 iroc z 5.7L ecm prom

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Jun 19, 2014 | 07:22 PM

eduardosac

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From: Sacramento, CA

Car: 1990 Iroc-z

Engine: LS3/LSA blower

Transmission: T56

Axle/Gears: 3.27

1990 iroc z 5.7L ecm prom

I am in need of a ecm prom for my 1990 iroc z 5.7L , let me know if anyone has one will appreciate it. Need one do to my cooling fan not turning on....i've changed the sensor on the passenger and driver side also the one that goes on the front plus a relay near break booster ,let me know if a new prom will help

Jun 19, 2014 | 09:28 PM

Tuned Performance

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From: Mile High Country !!!

Car: 1967 Camaro, 91 z28

Engine: Lb9

Transmission: M20

Axle/Gears: J65 pbr on stock posi 10bolt

Re: 1990 iroc z 5.7L ecm prom

Have you verified power to the fan relay on the dark green/white at 226f when the fan gets commanded on ?
The cts is located in the front of your intake assuming this is tuned port injection.
The prom or memcal rarely fails, if anything this is a wiring issue, cts or if tpi a 1227730 ecm.