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What causes the leak? bad body seam at the windshield bad glue? my truck does have a leak here, what do I tell the glass shop to do? Thanks!

I unplugged all the emission sensors and turns out a sensor was not the issue, because the rpm ran away again a few days later. Upon further inspection of the harness under the dash I took note of moisture in the box that all the harness connectors are housed and the main cam lock harness plug...

Thanks for the offer, I really appreciate it! Turned out being a emissions sensor feeding back bad information.

were all entitled to our own opinions.

That's why I purchased the HINO DX2 software.

I'm wondering if that is the case. I also noticed that the throttle position sensor 2 is out of spec? should read voltage 0.7-1.0 and it reads 1.7 if I recall.

Yes I am aware. The truck is in a county that does not have emission requirements.

When I say the DEF system deleted. The emissions computer and the engine computer were sent out and all the emissions related stuff was deleted from the computers, DEF SCR EGR and so forth.

It almost sounds like its trying to do a regen. lot of rushing air sound coming out of the exhaust then the RPM goes nuts

Okay, I have a problem with my 2015 Hino 258 rollback tow truck. Issue started yesterday. When I start up the truck after about a minute of idle the engine RPM instantly goes to 3000, no way of stopping it, I just need to turn the key off. It only does this when in neutral. Another example is...