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Au3 weak intermittent spark cylinders 1&2 .... wiring issue? 

 

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 Post subject: Au3 weak intermittent spark cylinders 1&2 .... wiring issue?
Posted: Thu Sep 26, 2019 9:10 pm 
Tyre Shredder
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Age: 33

Posts: 387

Joined: 24th Feb 2012

Gallery: 58 images

Ride: 2009 ve ss manual L98

Location: Port wakefield
SA, Australia

After a week of google search and testing/replacing things I still have weak intermittent spark at cylinders 1&2

Just bought this duel fuel au running badly on gas and didnt run on petrol ( no power at injectors)... I’ve since found the issue (broken wire from gas system connected to isc) but it still ran like crap on both so I’ve replaced the following.....

New leads
New plugs
New coil
Swapped cas ( no change)
Swapped cam sensor( no change)

Tested engine has ground with multimeter
Back probed the coil plug and has one constant power and 3 signal power wires

One thing I noticed prior to changing coil, I could feel current through one of the spark leads ( number one ) but I taped the end which goes on plug and that stopped but thought that was weird

Now it won’t run on gas but starts and it won’t start on fuel... so gotta start it on gas and switch it immediately after someone please steer me in the right direction where to look or what to test next cheers

 

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 Post subject: Re: Au3 weak intermittent spark cylinders 1&2 .... wiring issue?
Posted: Fri Sep 27, 2019 3:59 pm 
Tyre Shredder
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Age: 33

Posts: 387

Joined: 24th Feb 2012

Gallery: 58 images

Ride: 2009 ve ss manual L98

Location: Port wakefield
SA, Australia

How can I test ecu and how many bolts should be coming out of cas... plugged or unplugged

 

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