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Old 12-07-2019, 10:50 PM
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HWYSTR455 HWYSTR455 is offline
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Join Date: Jan 2005
Location: Manassas, VA
Posts: 14,744
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No, unfortunately, I'm having a TPS Autoset issue with the DBW setup, have posted on the Holley EFI forums, was suggested I call support, they say it can only be 2 things, the throttle body or the harness, but I question if the person I spoke to was correct.

Today I removed the driver inner fenderwell, and checked the entire DBW harness, no signs of damage, thought I may have pinched it during assembly, but that wasn't the case. I did some preliminary checks on the throttle body with an ohm meter, all looked right, but haven't dug deeper yet. Posted again on the Holley forums, and will call support Monday again and push to get better troubleshooting steps.

I was also having an issue with the vette PWM fan controller, wasn't working. Have been in contact with. Andrew70, he went over a bunch of stuff with me (thank you Andrew), and couldn't find the issue.

I was determined, and continued troubleshooting that after going over the DBW stuff. Originally, when I first applied power to the car, the fans came on, and I unplugged the controller. I at one point went back over it, and realized that on the I/O harness plug, I had plugged the PWM feed wire into the connector 'C' position, and it was supposed to be in the 'G' position. (my eyes aren't as good as they used to be!). I corrected that, and plugged the controller back in, but wasn't working.

So today, after going over all the wires again on the PWM and I/O connector, verifying it was correct, and for grins, plugged in a spare PWM controller I had, and boom, it started working. So guess when I had plugged it in originally incorrectly, it fried the controller. I had put it on a +12v output, and it requires a -5v signal feed.

So I got that figured out. The ECU won't fire injectors or ignition if the TPS doesn't check good on power up, so until that's corrected, I'm in a holding pattern on the start up. It's driving me nuts!

Tomorrow I will knock out some other items on my to-do list that need to get done, just so I'm moving forward. Monday I will work with Holley and see if we can get the DBW stuff figured out.

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