FASS HARD START FIX...another option.... - Dodge Cummins Diesel Forum

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post #1 of 4 (permalink) Old 05-04-2006, 08:15 PM Thread Starter
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FASS HARD START FIX...another option....

OK...i have been giving this some thought and have a few out there trying this. So far so good. Here is what i came up with:

This is only for the new harnesses with the Relay and Red/Green wire to the BATT.

Find the red wire in the FASS harness that goes from the Relay to the Stock Engine harness. What you want to do is cut this wire where (IF you have too) can splice it back together. This is the sensor wire for the relay and turns the FASS on.

Now solder or butt-splice (Whatever you prefer...just make it solid) a length of wire to the end that runs to the relay. You will need to run this into the cab and to the Fuse box. you will need to locate your Electric window fuse. Get a fuse tap and tap into the fuse. For those of you that don’t like taping into the fuse box, just locate a "Run" only Hot circuit to tap the wire into. (IE door jams where the wires are under the dash, find the electric window hot wire) This wire does not require much of a load at all so the amperage draw will be very small.

What this does is only allows the FASS to run only when the Key is turned to the "RUN" position. It will shut the FASS off when trying to crank. Thus dropping fuel pressure to 0 when tring to start. This fuse does not have power at "ACC" or "Start". The 2 trucks we have tried it on, it cleared the hard starts up immediately with no codes set.

Another option at least..........


Dan MacDonald

2002 TDI Jetta...stock for now

Last edited by Diesel-Dan; 05-04-2006 at 08:18 PM.
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post #2 of 4 (permalink) Old 05-06-2006, 02:30 PM Thread Starter
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ALSO to note......Marco said that his Smarty has the latest and greatest Flash from DC. This has shown to help with the hard starts as well. If you know someone with a Smarty....borrow it and try it out....when you go back to stock...you get the Reflash.........OR just do Marco a Fav....and get a Smarty! They really are a awesome! I will have one for my truck as soon as my clutch gets upgraded!

DTR Post with Marco's responce.....

Dan MacDonald

2002 TDI Jetta...stock for now
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post #3 of 4 (permalink) Old 10-02-2006, 04:26 PM Thread Starter
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Here is a diagram of the fix if any one wants it:
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Dan MacDonald

2002 TDI Jetta...stock for now

Last edited by Diesel-Dan; 05-16-2007 at 12:40 PM.
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post #4 of 4 (permalink) Old 10-03-2006, 04:53 PM Thread Starter
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