I have air linbe rigged up and going to do air test on my truck to diagnose for a hot no start leak. i am going to rig up line to hook from battery to the ipr. anyone tell me which prong on the ipr is the hot side? i know may be a dumb question but i am not sure.. and also can someone tell me do i need to hook my air up & turn it on then hook the ipr to 12 volts or hook ipr then add air?

 

From a previous post:

4 ways to close IPR

IMO the air test is not worth doing unless you hard pipe the air supply (ie the rubber tipped air tubing applied to the ICP hole is not reliable).

If you can't close the IPR valve for whatever reason, then it definitely is not worth doing.

4 ways to close the IPR:
1. Software like IDS to comand it closed (maybe AutoEnginuity will do it)
2. Buy an IPR connector and wire it up to apply switched power to close it: Red wire switched power Pin A: apply B+; Yellow/red switched ground Pin B: Apply B-
3. You can close it by having the key in the RUN position, and jumping pin #2 of C1381c (the middle of the three PCM connectors between the driver side battery and the inner driver side fender well which requires the battery cover removed to access) which will be a yellow wire with red stripe. This is the ground side wire to the IPR.
4. Tool to close the IPR: Automotive Tool Web-site - DenLors Tools; OTC 6764 Ford Diesel 6.0L IPR Controller / Tester

OTC 6764 Ford Diesel 6.0L IPR Controller / Tester | Multimeters, Amp Clamps, Test Leads tml


Don't hold the IPR valve closed for more than 2 minutes. I have been told it is OK to do it longer, but I don't want to put someone elses IPR valve at risk.