Weird issue with Hypertech Tuner...

[peteserra]

Hey Guys,

New to the forum, but love the Nissan brand. I just bought my wife an 08 Pathfinder LE with the 5.6. She doesn't care much for the gas-guzzling engine, but I absolutely love it... that sucker is strong!

Anyway, I just bought a Hypertech tuner because I would like to disable WOT and also see how it works with the 87/89 octane tune. I just have one problem, and it's so strange that Hypertech doesn't even know what to do..

OK, so I updated the tuner online before doing anything else-- success. Then I took it out to the vehicle and plugged it into the OBD port, the unit powers up and then gives me a message that says, TURN KEY TO RUN BUT DO NOT START ENGINE. No problem.. I turn the key to the RUN position, and....nothing happens! The message continues to scroll and scroll and scroll. I have tried unplugging it, turn the key off then back to RUN, and every combination in between. No dice. The tuner itself is fine-- I tried it on a buddy's Armada and as soon as I turn the key to RUN, the tuner proceeds forward immediately with all the tuning options.

After explaining all this to Hypertech, they said, "Uh, we have no clue, send it back for a refund." LAME!

So, you guys are my last hope!

Any thoughts??

Thanks in advance!

[atraudes]

I'd head to a car parts store and have them hook up an OBD scanner. Those scanners should look for the same voltage signal as the tuner. If their scanner doesn't work either, then the pin that delivers 12v when the ignition is switched on...isn't. Start checking fuses; I believe the OBD port has one. Also check the actual port and see if any of the contacts are bent out of shape, jammed, popped out, etc.

If it does work that hints at the problem maybe being with the tuner instead.

Jealous of that 5.6 I had an 08 Titan for a few years and loved driving it!