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Old 03-19-2011, 10:01 PM
skiguy35 skiguy35 is offline
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Default Auto purge not working

Just had a brand new V3 installed in my '02 excursion. When the installer finished, it was early this morngin and we had to hit the road. It's running on veggie, but in auto mode, the engine does not stay running when i shut the ingition off. I've been manually purging and shutting down. Any suggestions? could it be a setting the installer overlooked? something plugged in wrong? i'm heading back to installer (300 miles ) later in the week but have other trips, wanted to get it going. Thanks for the help.
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Old 03-20-2011, 02:09 AM
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Could be a number of things. What is the purge and idle time set for on the timer cards?
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Old 03-20-2011, 02:45 AM
skiguy35 skiguy35 is offline
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i just looked and it look like the white knob is set at 45 seconds. in think that is the idle time, correct?
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Old 03-20-2011, 03:37 AM
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There are two white knobs - one on each timer card. The timer cards are "stacked" so the knobs are above/below each other. One is for the idle time, the other for the purge time.
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Old 03-20-2011, 04:35 PM
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Sounds like you don't have a good connection from the timer cards to the engine run wire. Look at the cards, there is a yellow wire that comes from the cards and should connect to a wire on the truck. It's a white/with pink stripe wire on the 6.0s. If this yellow wire is not connected, there will be mo power from the timer cards to maintain engine run.
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Old 03-20-2011, 04:36 PM
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Don't touch those timer cards just yet... or those dip switches. I set those to 10/90 during my test after building it out. (And it's a ROYAL PITA to get the 90 back to 90... hence the black mark on the wheel).


First, I would do the stupid thing: check your fuses on the brain.

Then, I would work my way back up the circuit. When your truck is running, do the red LED lights on the timer cards light up? When you take your key out, does one timer card LED light go out after 10 seconds, and the other light go out after 90 seconds?

Since it's a new install, I'm going to go the safe route and assume that it's not a UNIT issue, it's an installation issue... and then FURTHER guess that the engine run wire wasn't properly attached to the "Engine Run Relay".

(Since you are able to manually purge, then I can assume your unit it getting power).


Jay
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Old 03-20-2011, 05:29 PM
skiguy35 skiguy35 is offline
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Jay, Patrick and Clay, thanks for the feedback. Only see one dial, and it is set to the black mark Jay put on it and the switches are where they should be. the red lights do have power when green light is on. I'll do some trouble shooting on what they do when i shut it down. I'm betting it's the wire not connected. Thanks again for the input.

justin
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Old 03-20-2011, 05:40 PM
skiguy35 skiguy35 is offline
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so it appears that the yellow wire is connected to something behind the fuse box, i need to take the fuse box down to determine what wire it is hooked to. What color is the 2002 Excursion 7.3L wire it needs to go to.

Fuses are good.
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Old 03-20-2011, 09:46 PM
skiguy35 skiguy35 is offline
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so i just shut down my truck in auto mode, both the red lights are on. the one under the white knob stays (run time) on for 90 seconds and the other light Purge) stays on for 10 seconds. I'm guessing the installer has wired something wrong and not hooked into the ignition?
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Old 03-20-2011, 10:26 PM
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That's exactly what it sounds like.
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