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Paul Workman · 02-23-2022

On the 90s, the (edit) MDS* sensor is under the ECM bracket. (edit) 93+ the MDS is under the plenum.

With the ignition switch OFF, current applied to the fuel pump test connection* is between 4-5 Amperes for each (8-10A total)

*Fuel pump test connector is a connector on the end of about an inch or so, jutting out of the big wire loom, near the windshield wiper motor.

I think most would agree that having a scanner that will read OBD-1 codes is worth its weight in GOLD when it comes to trouble shooting. (Mine has saved me countless hours of trouble over the years! Just sayin!

*Manifold Differential Pressure sensor (thank you Jerry for clarification)

02-23-2022	#6
Paul Workman Join Date: Nov 2007 Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri Posts: 6,466	Re: Engine no start after ECM put back in On the 90s, the (edit) MDS* sensor is under the ECM bracket. (edit) 93+ the MDS is under the plenum. With the ignition switch OFF, current applied to the fuel pump test connection* is between 4-5 Amperes for each (8-10A total) Fuel pump test connector is a connector on the end of about an inch or so, jutting out of the big wire loom, near the windshield wiper motor. I think most would agree that having a scanner that will read OBD-1 codes is worth its weight in GOLD when it comes to trouble shooting. (Mine has saved me countless hours of trouble over the years! Just sayin! Manifold Differential Pressure sensor (thank you Jerry for clarification) Last edited by Paul Workman; 02-24-2022 at 11:06 AM.