may sill have air in the system..

 

Ok, looking at the Ford sheet again, it says DTC P1294 (getting reading glasses cleaned tomorrow), which is:

AB20 DIAGNOSTIC TROUBLE CODES (DTCs) P1294 AND P1293: CHECK FOR VOLTAGE ON HIGH SIDE CIRCUIT
DTCs P1294 and P1293 indicate an open circuit exists on the high side circuit between the IDM and the injectors. The following table lists the circuits to inspect while performing these pinpoint tests, based on the DTC retrieved during the KOEO On-Demand and Injector Electrical Self Tests.

DTC High Side Injector Bank
P1294 878 (PK/Y) Left
P1293 1087 (O) Right

Key off.
Disconnect both connectors on the bank with the code.
Key on, engine off.
Measure voltage on the suspect high side circuit Pin C on the injector vehicle harness connectors and battery ground.
Is battery voltage present?
Yes No
GO to AB21 . GO to AB24 .

I should see Batt voltage at the center pins with KOEO - I see 1.2vdc on the good side, and 3vdc on the bad. So, since I've checked the continuity of the harness through to the solenoids, this would indicate a bad IDM.

So, anyone got a spare IDM for sale?? Although I am going to hit up the Ford dealership for bad workmanship tomorrow morning.. the guy clearly mis-diagnosed my problem, I can't image what they would have charged me if they had replaced these injectors and then discovered it was something else...

 

I would go there also .





Print the thread & bring it with you ..

BTW good diagnostic work.. ....

 

Pulled the IDM and I left it on table for awhile vent side down, came back to it 20 mins later and there was a puddle under it...

Yeah, I'm even more certain I found my problem..
Boo, my truck is still 200 miles from home and I'm already $1000 in the hole for it...

How hard is it to open these things up?

 

take the screws out , cut the sealer..

 

Rick is a wet idm salvagable, just wondering pulled mine yesterday and it had water in it. I was lucky where I had a friend who had a spare one.

 

The only way to know if to let it dry out and plug it back in to see. Electronic boards don't like to get wet when they have current running through them. Usually it means they're toast, but there's only one way to find out.

 

It is worth a shot ...

 

I think I will open mine up tonite since i have to give the one on my truck back after next weekend. hope it works, thanks a lot.

 

Well, I spoke with the Ford service manager, being polite so he's still on "my side", and he stated that it's quite possible for a bad IDM to fry the solenoids on one bank, or the opposite, if a solenoid goes out it can damage the IDM..

Just curious if anyone has ever seen or heard of this happening. Unfortunately, I've already returned my old injectors as cores, and never thought to check them..

I don't know what kind of documentation the technicians keep on their work beyond what goes onto the invoice, but the invoice does not describe him performing any checks on the harnesses or the IDM

 

That would be a first. He is covering his butt..

I have heard of 1 bad solenoid shutting down 1 bank. Due to the IDM going into protect mode ,(so it won't be damaged ) ,never heard of 1 causing the IDM to go bad,or other solenoids ..

They need a little more practice on a 7.3 ..

 

Opened up the IDM, it was definitely bad. Had water, enough to soak the edge of the card and cause a pad around a resistor to lift, until the current burned the card. I should be able to resolder the connection, but the card is damaged and I wouldn't trust it beyond just testing it to see if it is the final problem with my truck.

 

I've seen a bad soleniod cause the IDM to shut down one bank. Rick helped my diagnose that one on a truck at work. That was a year or two ago. We dropped in one new injector (with new soleniod) and haven't touched it since. No problems with the IDM after the new injector went in.

The best advice would be to avoid that particular dealership in the future unless you discover your wallet is too fat and needs some lightening.

 

Yeah, he's covering. Since this fault - water in the IDM - was certainly not caused by the injectors. The fault code (P1294) should have sent the tech to the IDM first, it should have been one of the first things tested and found to be bad. Whether the injectors are bad or not at this point is irrelevant, because the tech clearly did not follow the procedure for troubleshooting that DTC. He should have found the bad IDM first.

 

Very good advice ...