AIH Delete Warning

[kawasaki150hp]

I still have the AIH delete but I read on here where you where to replace the blue wire back to the solenoid. I did this and 1,000 miles later my computer is fried in which Ford said was caused by the AIH delete in where the blue wire was reconnected. The tech pulled the wire and taped it up so not to make conntact with anything. I mentioned I reconected it in hopes not to throw a code and he told me it would anyway, not to worry about it. I never heard anything about this mod being able to fry the computer, I dont know if it's true or not but I just wanted everyone else to know about it, if it was possiable. Also they ordered a new computer installed it and I made it ten miles before the dealership was sending a tow truck to. It was then that I learned that they install rebuilt computers and not new ones and the one they put in must have been bad as well (go figure) so it is currently still in the shop hopefully I'll get it out today. But I just wanted everyone to know just in case.

[wildbill1963]

Something does not sound right. You are the first to post with a problem with the computer getting fried because of this mod.

There is no reason why this mod should fry the computer, the dealers can use anything as a reason.

[Jeff27]

I reconnected mine and have been going for around 20 - 25K miles with no problems. When I got my Edge Evo. programmer and set the SES light once when I overboosted it did show the code for AIH. However, it does not set my ses light or anything...it doesn't give me any problems [img]/ubbthreads/images/graemlins/shrug.gif[/img]

[hardware45]

[ QUOTE ]
I still have the AIH delete but I read on here where you where to replace the blue wire back to the solenoid. I did this and 1,000 miles later my computer is fried in which Ford said was caused by the AIH delete in where the blue wire was reconnected. The tech pulled the wire and taped it up so not to make conntact with anything. I mentioned I reconected it in hopes not to throw a code and he told me it would anyway, not to worry about it. I never heard anything about this mod being able to fry the computer, I dont know if it's true or not but I just wanted everyone else to know about it, if it was possiable. Also they ordered a new computer installed it and I made it ten miles before the dealership was sending a tow truck to. It was then that I learned that they install rebuilt computers and not new ones and the one they put in must have been bad as well (go figure) so it is currently still in the shop hopefully I'll get it out today. But I just wanted everyone to know just in case.

[/ QUOTE ]

Perhaps something like this is what happened to some parts of my PCM? I have had some bizarre electrical issues with relay trigger signals that are supposed to come from the PCM like A/C and fuel pump. I don't know if some trailer wiring issues are from the same thing. I do know I did the delete, and I think I completely removed the wiring. Is there some grounding that this AIH wiring supplies that could have caused parts of the PCM to go bad?

[klhansen]

[ QUOTE ]
Something does not sound right. You are the first to post with a problem with the computer getting fried because of this mod.

There is no reason why this mod should fry the computer, the dealers can use anything as a reason.

[/ QUOTE ]

I agree. The dealer is just feeding you a line of s___. (Typical!! [img]/ubbthreads/images/graemlins/rolleyes.gif[/img])

The wire is just a signal wire that gives the PCM some feedback on whether the IAH is operating or not when commanded to. What if the IAH had simply burnt out? That would be identical to the situation with the IAH removed and the wire connected.

The code isn't a big deal anway, but having that wire connected shouldn't fry the PCM.

[Larry M]

[ QUOTE ]
[ QUOTE ]
Something does not sound right. You are the first to post with a problem with the computer getting fried because of this mod.

There is no reason why this mod should fry the computer, the dealers can use anything as a reason.

[/ QUOTE ]

I agree. The dealer is just feeding you a line of s___. (Typical!! [img]/ubbthreads/images/graemlins/rolleyes.gif[/img])

The wire is just a signal wire that gives the PCM some feedback on whether the IAH is operating or not when commanded to. What if the IAH had simply burnt out? That would be identical to the situation with the IAH removed and the wire connected.

The code isn't a big deal anway, but having that wire connected shouldn't fry the PCM.

[/ QUOTE ]

That was exactly what I was thinking but I didn't trace this blue wire and as you said simply disconnecting the AIH power wire to the coil would be the same as it burning out and that shouldn't take out the PCM.


Larry, keeper of the <font color="red"> New revised </font><font color="blue">"little secrets" </font> CLICK HERE [img]/ubbthreads/images/graemlins/smile.gif[/img]

[copano]

Yup, more stealership bs.

The PCM looks for a range of resistance that it expects in an intact IAH heater element.

Thats why Just hooking up the blue wire back to the solenoid will trigger a stealth code as the PCM now detects an open circuit.

If memory serves me right a 125ohm resistor from blue wire to ground will prevent that code but I used a 330 ohm on mine as thats what I had in the junk box so the value isn't fussy.

BTW, the code is no big deal unless you run a cylinder contribution test with a scanner as it won't perform that test even if you delete the code, pretest scan will pick up the code again.

[kawasaki150hp]

Thats what I figured he never gave me a real answer on exactly how that happend. But they still can't get my truck to run in been in the shop now for 3 days, maybe tommarow.

[klhansen]

[ QUOTE ]
BTW, the code is no big deal unless you run a cylinder contribution test with a scanner as it won't perform that test even if you delete the code, pretest scan will pick up the code again.

[/ QUOTE ]

Hmmmm! Tell me more.

We were running a CCT on a buddy's early 99 (no IAH at all) and kept coming up with the P0541 code for IAH. Apparently his PCM has been reprogrammed as a 2000. Does this mean that a CCT will not work on his truck as it's now configured. That would be bad, as we were trying to track down a suspect injector. The code only showed up after the CCT had "completed".

I haven't seen any reference to this in the material I have. [img]/ubbthreads/images/graemlins/shrug.gif[/img]

[wildbill1963]

You can get the P0541 Code Eliminator

[copano]

[ QUOTE ]
Hmmmm! Tell me more

[/ QUOTE ]


Not much else to say...Blue wire with resistor to ground or the code eliminator sold by one of the sponsors will take care of the problem and allow for a CCT.

[kawasaki150hp]

Just a follow up on this it was BS, because yesterday they called me and said that the new computer was in but my truck still wasn't running right and that now they think there is a short somewhere in the wire harnes. But have no idea where. So they have had the truck for a week now and have no idea when it will be ready because now the tech has to trace every wire to it's sourse in order to find the short. This sounds like a long process to me so no telling when I'll get it back.

[wildbill1963]

[ QUOTE ]
Just a follow up on this it was BS, because yesterday they called me and said that the new computer was in but my truck still wasn't running right and that now they think there is a short somewhere in the wire harnes. But have no idea where. So they have had the truck for a week now and have no idea when it will be ready because now the tech has to trace every wire to it's sourse in order to find the short. This sounds like a long process to me so no telling when I'll get it back.

[/ QUOTE ]

I feel for you. This will be a tedious process for them. It would be cheaper at this rate to replace the harness!

[kawasaki150hp]

Good idea I may just do that.

[Kanman]

[img]/ubbthreads/images/graemlins/rolleyes.gif[/img] You would sure as hell think the stealership would make sure they knew what they were talking about before they opened up their big yap... Guess not!