UPDATE: New intank pump installed. Used seperate relay for external pump triggered by oem relay. Installed mehanical gauge inline between in tank pump and external pump just ahead of inline fuel...

Thanks I guess I'll have to experiment until I can fully understand how forums work.

What is the difference of a "quick reply" a "regular reply" a "reply with quote" and a "reply to thread" ???? thanks

Current info: 1986 33' motorhome on P30 chassis with 454 Gen V engine and TBI system including OBD1 wiring harness installed from a 1993 C3500 HD. 1228747 ANRS ECM.


After two intank fuel pumps...

Thanks for both replies !!

I have already purchased a 40ppr inline speed sensor (same configuration as my original 8ppr) from jagsthatrun.com based on info from different sources. My only...

Converted vehicle: 1986 Holiday Rambler Imperial 33'
Mark IV 454 4bbl/TH400
The current VSS(signal generator) on speedo cable at trans is (59D-02392-1 / 8ppr).

Donor vehicle: 1993 C3500 HD...

I've got the fuel control wiring mostly complete and now looking to send the vss signal to the 8747 ecm A10 terminal. I do have a drac available but hope to use the original Dana cruise control...

You are right on with my situation. After bench testing the 93 wiring harness I've concluded that I will disconnect the the 86 FP relay and run solely off the 93 relay and ecm controls. Also making...

Thanks for your answer. The 1986 setup only ran the in tank fuel pump in the crank position to assist the carb. Possibly after oil pressure built up also. And yes it is only a 2 second run. I got the...

Does the ecm initiate the 20 second fuel pump run when the key is turned on? 1993 C3500 HD TBI to 1986 carb motorhome conversion with 1228747 ANRS.

Engine pulled out of the '93 yesterday. Ate turkey today and started filling my head with ecm stuff. I finally got brave enough to remove the 24 pin chip from it's holder and was able to barely read...

I have the '93 engine ready to pull tomorrow morning. I pulled the ecm but cannot view the numbers on the prom because of the enclosure on the chip and didn't want to damage it. I did get the ID...

After viewing info on ecm s/n 1228747 that I removed from my 1993 C3500 454 std 5pd I was suprised to find in the GM
ECM Forum it shows that ecm was used in 89-90 Chevy trucks. I'm not sure why...

Hello to everyone !! I'm trying to gather helpful information for my project which is: Installing a 1993 C3500 454 complete engine and wiring harness into my 1986 Holiday Rambler motorhome. I am...