7.3L Dies Randomly

[DocBar]

Got my new hydra yesterday. Put it in and everything seems fine so far. Put about 50 miles on it so far. I also put a new IPR in it as well just to be sure.

The only issue I had and it did it a couple times.... It used to have a subtle miss when in park revved up above 2000 RPMs. Last night, after it was warmed up, I held it up to almost 3000 RPMs for a few seconds. As soon as I let off, it died. Drove about 5 miles and did it again. Put in park, revved it up, held it at like 2700 RPM and let off. Soon as I let off, it died.

Maybe my ICP connector needs changed too. The old ICP leaked and I put a new one of those on too. Didn't change the connector though. I need to data log it and see what is going on.

Can you clean the connector with contact cleaner?

 

[mandkole]

Black, have you talked to the tuner about the dying? Seems like a tuning issue..

 

[lucasm1998]

My truck does something similar. Water can sometimes get in the cps connector and cause it to do exactly as you mentioned. The best bet is to buy a new cps from ford (many other companies sell bad ones) and clean both connections with contact cleaner and fill the connector with diode electric grease. This should solve your problem


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[Black 02]

Can you clean the connector with contact cleaner?

I tried that. Didn't seem to help.

 

[Black 02]

Here is a bad video of the miss on the freeway.

https://youtu.be/kU5rmjlnI3c

 

[mandkole]

Fuel press is good? no bouncing gauge?

That miss seems pretty consistent. Electrical perhaps? A bad injector wont be that noticeable. The OBS sounded like that when a cps was giving it up, but it became more pissed off quickly. May want to check for codes.

 

[Black 02]

Fuel press is good? no bouncing gauge?

That miss seems pretty consistent. Electrical perhaps? A bad injector wont be that noticeable. The OBS sounded like that when a cps was giving it up, but it became more pissed off quickly. May want to check for codes.

I did a buzz test and got P1298 code (IDM Failure). I have the Swamp's IDM, so I was told I'll get a code. I'm assuming that's it. I put a brand new CPS in it. It's the Dark Grey one. I got it from RiffRaff. Maybe I should put an old black CPS in it for ****s and giggles.

Other than that, I got an AIH code and a EBP code. I ignore those because they don't really apply any more for my engine.

I'll try to extend the gauge and check the fuel pressure. I have the Fuelab pump, so I'm guessing it's fine. I had it set at 65 psi idle.

I had a similar issue in the past but not as noticeable. It ended up being the throttle position sensor. This time, it doesn't matter if cruise is on or not.

 

[Countrycar]

Well, after trying to figure out why the truck wouldn't start, I decided to pull out the Hydra chip. Truck fired right up. Plugged the chip back in and it wouldn't start.

Although it's been about 5yrs or so, I had the exact same thing happen to me. It turned out to be the 6 pos chip,It was shorted out. I sent it to Matt, and he confirmed that it was shorted out from with in, so I had to purchase a new one. It is rare but it does happen.