Swapping ECMs
Thread Starter
Supreme Member
Joined: Dec 2001
Posts: 1,960
Likes: 1
From: Newark, DE
Car: 2006 Corvette
Engine: LS2
Transmission: T56
Axle/Gears: 3.42s
Swapping ECMs
Can a 86 or 87 Camaro carbureted ECM be swapped into an 84 Z28? I heard the 86 and up computers are faster and updated over the earlier ones. Would this interfere with any of the electronics if both computers operate the same sensors and have the same hookup? The motor is the LG4 with automatic.
Junior Member
Joined: Jan 2001
Posts: 67
Likes: 0
From: Fort Wayne, Indiana
Car: 1987 Pontiac Fiero
Engine: 3800 Series 2 Turbo
Transmission: 4T60-E
Axle/Gears: 3.33
According to my wiring diagrams, the systems are compatible except for a few minor items. For instance, the '84 EGR wire is on pin T, however; the '86 diagram shows the EGR to be on pin 19 and is PWM. This should be compatible with your older system. The other difference is on pin E for the idle solenoid. Your '84 shows it to be a "throttle kicker" that has 12vB+ with engine run; but the '86 system shows it to be an idle solenoid with less than 1v with engine running.
Other than those 2 things, the schematics show both systems to be identical.
Other than those 2 things, the schematics show both systems to be identical.
Thread
Thread Starter
Forum
Replies
Last Post
