Mefi1 guys please HELP! 502 efi GenV problems with Mefi1

Reply Subscribe

Thread Tools

07-22-2022 | 07:50 AM

#11

AP700

Thread Starter

Registered

Joined: Apr 2021

Posts: 104

Likes: 37

From: Germany

Quote:

Originally Posted by AllDodge

Being a MEFI 1 it might have a VST and should be using manual 16. Tell us more about the motor, VST or cool fuel, TB or EST ignition. With code 42 it should have EST

Okay I just looked up in my Manual #16, it says the same. 423 should have over 3000 ohms to ground, and when i trigger 424, 423 should drop the ohms to under 1000. My module does it the opposite way. except when I remove the ground wire of the EFI harness. then it will do it the right way.

07-22-2022 | 07:54 AM

#12

Registered

Joined: Nov 2004

Posts: 14,140

Likes: 3,708

From: On A Dirt Floor

Quote:

Originally Posted by AP700

The distributor, I don't know what is what, so how can i identify? it is the distributor with the pick up coil and the ignition control module inside it. 2 connectors, the 4-pin is all for the ECU, Ref LOW, REF HI, BYPASS and IC. the 2-pin is + and "C" to the ignition coil.

Merc Est / gm voyager / gm late model external coil hei / etc, etc. Has lots of names

07-22-2022 | 07:56 AM

#13

AP700

Thread Starter

Registered

Joined: Apr 2021

Posts: 104

Likes: 37

From: Germany

yes should be this one. replaced the pick up coil ant the module serveral times. always used heat paste under the module.

07-22-2022 | 07:59 AM

#14

AllDodge

Registered

Joined: Nov 2009

Posts: 4,198

Likes: 500

From: KY

Quote:

Originally Posted by AP700

Yes it has the VST system. The distributor, I don't know what is what, so how can i identify? it is the distributor with the pick up coil and the ignition control module inside it. 2 connectors, the 4-pin is all for the ECU, Ref LOW, REF HI, BYPASS and IC. the 2-pin is + and "C" to the ignition coil.

It has EST ignition
Are you getting 5V on pin J2-24 Bypass?
Is there 5V reference at the MAP pin C and at TPS pin C?