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Old 03-23-2010, 02:28 PM
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Louisiana Boys CEL is on

Ok I have gone to autozone many times and it passes I bring it to a wholeseller I know and it throws P1316 & P1247. I searched on here a lil and it says the IDM and a turbo boost pressure I think. To me the truck runs fine except in the morning when I first start it. It runs ruff until it warms up then runs fine all day after that. I know the plugs need to be replaced but my thing is I don't want to spend $500 on a IDM from autozone if that's not the problem.

also when he took the oil fill off there was either steam or smoke, what was he checking and is there something wrong?

What and where should I start?

Also I'm in Lafayette does anyone know a fairly priced mechanic around here?
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Old 03-23-2010, 04:45 PM
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P1316 Injector Circuit/IDM Codes Detected
P1247 Turbo Boost Pressure Low

First, the scanners at AutoZone are not sophisticated enough to communicate with a PowerStroke. You need a high end scanner like AutoEnginuity. The IDM code could have come up with an intermittant connection of the under valve cover harness, a fairly common and extremely easy problem to fix. The low turbo pressure could be a leak or a bad MAP sensor - also fairly easy to fix

Second, the crankcase on the 7.3 passively vents to the cold air intake. The blow-by gasses on a gasoline motor get sucked through the PCV valve using engine vacuum. The diesel doesn't make vacuum so they just let them drift into the cold air. By taking the oil filler cap off, he was just looking to make sure there wasn't excessive blow by (bad rings or cracked piston)

If it runs good, I think you should just clear the codes and run it for a while. Don't waste money throwing parts at codes. Check the codes again in a few weeks and see what re-appears. If the same code shows up, start tracking it down using deductive reasoning. In the mean time, read here about checking out your glow plugs:

http://www.thedieselstop.com/forums/...e-first-75094/
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Old 03-24-2010, 05:58 AM
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both the harnesses are tight and the light comes right back on after they are cleared. I'm trying to sell it so I need to know where I should start. I know I have some plugs to are either bad or disconnected. Do I need new valve gaskets when I do this?
How to fix the map sensor cuz I do have DIY intake that has been on for over a year now.

Also this the first time in 3yrs the light has ever come on, why now?

Last edited by jsimonff; 03-24-2010 at 06:07 AM.
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Old 03-24-2010, 06:44 AM
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Are the harnesses tight on the outside of the valve cover or on the inside? The inside is where they normally are loose. The valve cover gaskets are re-usable unless you have pin damage (should be able to tell with a visual inspection)

Is your MAP sensor not hooked up? That would cause a lot of problems. If it is hooked up, make sure the hose is not corrupted.

I think you are going to need to put a scanner on it that monitors the MAP sensor as the engine is running, and need to do a continuity test between the IDM and the individual injectors if you are sure the UVCH is good. I'm not saying your IDM isn't bad, just that I would rule out wiring/connections before I got a new one. And if you do get a new one, you can get a rebuilt on e-bay for less than 200 bucks.
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Old 03-24-2010, 01:05 PM
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Take it to Hub City Ford on I-49 . Thats if you want it done right. As far as mechanics go. They have not failed me yet. they are the only ones i trust
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