TDI-Tuning install on P400
@Ford Nice mounting location (I chose the drivers side b/c I have winch wiring / accessory wiring in the passenger area).
After many months, I’ve forgotten I even have this on the car but I like the extra goose it gives. I do really like it.
I did have one trip to Los Angeles in January 2026 where I was getting a stumble or miss at part throttle on the highway. When maintaining steady speed, if I tipped in the throttle partially to accelerate, the car would each time do a single “jerk” (a miss?) This happened 3-4 times on one morning going up a mountain pass. No chk engine lights or codes (I checked the Gaptool, although I didnt check misfires, I couldn’t remember how). I’ve just moved between OR and WA and drove the car back-forth a # of times on the highway under similar condition without issue. I’m chalking it up to bad gas or something else amiss. I don’t think it was the TDI box/ TDI tune but you never know. I was running it on either setting 5 or 6.
After many months, I’ve forgotten I even have this on the car but I like the extra goose it gives. I do really like it.
I did have one trip to Los Angeles in January 2026 where I was getting a stumble or miss at part throttle on the highway. When maintaining steady speed, if I tipped in the throttle partially to accelerate, the car would each time do a single “jerk” (a miss?) This happened 3-4 times on one morning going up a mountain pass. No chk engine lights or codes (I checked the Gaptool, although I didnt check misfires, I couldn’t remember how). I’ve just moved between OR and WA and drove the car back-forth a # of times on the highway under similar condition without issue. I’m chalking it up to bad gas or something else amiss. I don’t think it was the TDI box/ TDI tune but you never know. I was running it on either setting 5 or 6.
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forsakenriceboy
Discovery II
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Mar 13, 2014 11:37 AM



