Need help with EST
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Junior Member
Joined: Dec 2000
Posts: 8
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Need help with EST
What would happen with the EST undone?
I have a 88 MPFI 2.8 V6 and I just rebuilt it and it would bog on takeoff badly,but when I unplugged the EST it runs fine.I set the timming with it unplugged and with it plugged in.with it unplugged i set timmimg then plugged the EST back in and the Timming would go haywire.I set timming with plugged in and it would stay put.It would bog and hiccup and miss and all the works,I unplugged the EST and it ran perfect.
I have a 88 MPFI 2.8 V6 and I just rebuilt it and it would bog on takeoff badly,but when I unplugged the EST it runs fine.I set the timming with it unplugged and with it plugged in.with it unplugged i set timmimg then plugged the EST back in and the Timming would go haywire.I set timming with plugged in and it would stay put.It would bog and hiccup and miss and all the works,I unplugged the EST and it ran perfect.
Supreme Member
Joined: Jul 1999
Posts: 1,335
Likes: 2
From: Tucson, AZ, USA
Car: '92 Z28; Dk Teal; Her Pkg
Engine: 305
Transmission: Richmond 6 Spd
Axle/Gears: Moser 9", Detroit Locker, 3.70
Unplugging the bypass wire, or the entire 4 wire connector going to the distributor makes the module in the distributor the timing controller. Normally, after the engine is started, timing control is turned over to the ECM.
Tim
Tim
Supreme Member
Joined: Jul 1999
Posts: 1,335
Likes: 2
From: Tucson, AZ, USA
Car: '92 Z28; Dk Teal; Her Pkg
Engine: 305
Transmission: Richmond 6 Spd
Axle/Gears: Moser 9", Detroit Locker, 3.70
You would not be taking advantage of the correct spark curve, that is programed into the computer, if the computer is not allowed to control the distributor.
Tim
Tim
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