Crank Sensor
Joined: Mar 2017
Posts: 4,255
Likes: 427
From: Portland, OR
Car: 86 Imponte Ruiner 450GT, 91 Formula
Engine: 350 Vortec, FIRST TPI, 325 RWHP
Transmission: 700R4 3000 stall.
Axle/Gears: 9 Bolt Torsen 3.70
Re: Crank Sensor
Well..... you see that's not exactly a thing. The ECM in these cars doesn't care about crank position. The injectors are bank fired in a single "batch" of all 8, and ignition events are timed by dead reckoning off the distributor base timing. The ECM doesn't even know what the "real" timing is - just what it's told it should be mechanically set to. It just knows it's supposed to fire whichever spark plug the rotor is pointing at. And fire all the injectors at X duty cycle based on engine load and RPM.
Joined: Oct 2001
Posts: 12,233
Likes: 1,166
From: Il
Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: Crank Sensor
Yup. No crank sensors on these cars
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Junior Member
Joined: Oct 2018
Posts: 14
Likes: 0
Re: Crank Sensor
Well..... you see that's not exactly a thing. The ECM in these cars doesn't care about crank position. The injectors are bank fired in a single "batch" of all 8, and ignition events are timed by dead reckoning off the distributor base timing. The ECM doesn't even know what the "real" timing is - just what it's told it should be mechanically set to. It just knows it's supposed to fire whichever spark plug the rotor is pointing at. And fire all the injectors at X duty cycle based on engine load and RPM.
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