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Put a EL V8 ECU into my EDV8 - buzzing relay on LPG 

 

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 Post subject: Put a EL V8 ECU into my EDV8 - buzzing relay on LPG
Posted: Sat Feb 09, 2008 8:59 am 
Getting Side Ways
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As part of my dash conversion on my ED V8 wagon, I had to put in a ECU from a DL LTD. My car has LPG and before I took out the original ECU, I recorded what wires the sprintgas gas ECU tapped into. When installing the later model DL V8 ECU, I connected the wires from the gas ECU.

The car fired up and runs on gas however there is a singing relay that is buzzing at a high frequency whenever the car is running on LPG. The buzzing is gone when its running on petrol though.

My question: Is there a different setting between EB-ED V8s and EF-EL V8s in terms of how the LPG ECU is programmed? I'm thinking that the buzzing relay may be a poor connection somewhere instead but I'm not entirely sure.

 

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Posted: Sat Feb 09, 2008 6:18 pm 
Getting Side Ways
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EB ED would be EECIV, and EF EL Would be EECV, so my guess is there is a difference in what the ECU's do and how they are pinned out
Brett

 

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Posted: Sat Feb 09, 2008 8:24 pm 
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Well you need to track the relay down - is it relay related to the LPG install (most likely)? AFAIK the only relays that come to mind with aftermarket mixer/converter LPG installs are for switching the O2 sensor output, fuel gauge input (if the cluster indicator is used for both), and shutting the injectors down on LPG.

 

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97 EL Futura S/W: LPG, Alarm, LED int Lts, Trip Comp, F/Lane Dome Lt, Climate Ctrl, T5 Conversion

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Posted: Sat Feb 09, 2008 9:52 pm 
Getting Side Ways
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Location: Lower Hunter Valley
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I checked the AEB website to double check my wiring and it is 100% correct. I have 4 wires that intercept the o2 sensors(polarity correct), 2 yellow wires that intercept the fuel pump, TPS signal wire and a PIP sensor signal wire

I opened up the lpg ecu box and I found the buzzing relay. I also found a couple of potentiometers and a small jumper switch. I'm going to have to have another look and see if I can identify what the relay belongs to and get back.

This is the final step of a relatively easy dash conversion from ED to EF.

 

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Posted: Sat Feb 09, 2008 10:52 pm 
Getting Side Ways
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Age: 43

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Joined: 29th Nov 2004

Gallery: 15 images

Ride: BA Ford Fairlane V8

Location: Lower Hunter Valley
NSW, Australia

Also another point. When I went for a run yesterday while I was running on gas, the thing cut out, ie, it stopped humming and switched to petrol briefly before going back to gas.

EDIT: 2 wires from the LPG module intercept the ignition 12v wires from the salt & pepper plugs at the rear of the inlet manifold. These were the wrong way around and the relay was getting a reversed polarity. All fixed now. Cheers.

 

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