2003 mustang u7146 Speedo not reading right

mustangjoe1981 · Post by **mustangjoe1981** » Sun Jul 26, 2009 9:06 pm

When I try and update the rear end ratio on the factory hp tune it lets me change the settings and upload it to pcm but when driving the spedo is still off. When I change that setting on the diablo tune the speedo is correct. All I want is to keep the factory hp tune and have the speedo read right with the 4.10 gears.

Phil · Post by **Phil** » Mon Jul 27, 2009 9:14 am

On your u7146 predator what is the revision on your tuner? This can be found all the way at the top of the screen while on the main menu.

mustangjoe1981 · Post by **mustangjoe1981** » Mon Jul 27, 2009 10:20 am

v.7r50d

Phil · Post by **Phil** » Mon Jul 27, 2009 10:43 am

Restore the original backup to your vehicle then update your predator to the latest revision 9r07.

mustangjoe1981 · Post by **mustangjoe1981** » Mon Jul 27, 2009 10:52 am

How do I update the predator?

Phil · Post by **Phil** » Mon Jul 27, 2009 10:58 am

Once you have the pc interface kit (the 2 cables) > Usb to 9 pin serial cable and 12v 1 amp power adapter. You can go to our website and download the latest revisions.

mustangjoe1981 · Post by **mustangjoe1981** » Mon Jul 27, 2009 11:11 am

Where can I get this kit?

mustangjoe1981 · Post by **mustangjoe1981** » Mon Jul 27, 2009 11:30 am

never mind I found it on your site

Phil · Post by **Phil** » Mon Jul 27, 2009 11:34 am

If you have a local Radio Shack or Best Buy near you the cables are available there also.

concoursd · Post by **concoursd** » Mon Jul 27, 2009 1:13 pm

DO NOT update your predator if you have long tube headers or an off road pipe as you cannot turn off your rear 02's with the new revisions. That feature was removed for EPA reasons.

lazorrazor · Post by **lazorrazor** » Tue Jul 28, 2009 3:47 pm

Ah Hah! The plot thickens!!! It would be nice if people were told about not being able to turn off the O2's when upgrading from an older version!!!! I got a black eye some time ago....it's all good now but it was a pain in the arse back then.

2003 mustang u7146 Speedo not reading right

2003 mustang u7146 Speedo not reading right

RE: 2003 mustang u7146 Speedo not reading right