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1G 1991 ECLIPSE 2.0 NON TURBO ECM

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mushe40

5+ Year Contributor
32
1
May 8, 2021
West Enfield, Maine
I'm looking for a racing computer for my 1991 Eclipse NT. I've contacted a few company that do ECM work, they say they don't have a program to update it. Mine breaking down when step on it.

If I unplug the wires square plug on left botom of throttle body it will turn up good when let of it it stalls so ive found that the plug to the cold air breather if I plug in this plug to the throttle body it makes noise like a little ball rolling around in side start up but wont turn up im not sure whats happening.

I think where it has big cams and spring stage 2 cams matching double springs. I'm thinking the computer is haveing a fit but this car is new to me. It's a race car the motor is brand new everything is brand new right down to the bolt but I need to figure this out. The previous owners cut bunch of wires out so when I got the race car motor and all was all in million pies every wire in this thing was replace from begining til end but I've always followed where they were going replaced one wire at a time it will run but run shitty higer rpms.

Can any one help me out?

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If you don't have any way to tune your computer with bigger cams I would add an adjustable fuel pressure regulator and try increasing fuel pressure to see if that helps. You're adding more air with big cams so you need to add fuel as well. Also would recommend adding a wideband 02 sensor so you know what air/fuel ratio the car is running which will help you dial in the fuel pressure you need.
 
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