Long time looker but new poster. 2001 7.3L F-250 purchased used. Truck was rode hard put away wet, has a unknown chip. I got this truck for a good price, the previous owner new nothing about trucks, let alone a diesel. Truck had oil in water & water in oil when I got it. The new water pump was my first clue. The owner had a leaky water pump, let the coolant get low and cracked #8 cly. I found a used IHC bus block & rebuilt (machine shop did all the machine work) the motor with OEM parts and put it back in. Truck would have a miss here and there but not constant until I took it for a long test drive last weekend. While going down the road the truck surged and the check engine light came on. When I slowed down for a stop sign the truck would barely stay running, but at higher RPM it ran good. Checked the FTE forum and valve cover gaskets were the common theme. Ohmed both sides 6 were at 4ohm's and 2 where at 5 ohms with a Fluke meter. Took both sides apart and the connections were good, none burnt, cleaned and invested 50 cents for the connection mod. Put everything back together and still ran bad at idle and shuts off after 60 seconds of idling (fuel tank is full and has new pick up foot and harpoon mod and clean strainer). Because of the unknown chip I took it to the dealer to reflash the PCM tomorrow and start over with a DP F-5 tuner. Any other ideas?

Codes:

P1280 INJECTION control Press circuit low

P0237 Turbo boost sensor low

P0603 PCM

P0478 Exhaust press control valve hi input

P0470 Ezhaust press sensor

B1676 ABS

Thanks

 

Welcome to FTE. What are you using to pull codes? Can you read live data with it? If you clear the codes, which ones come back?

P1280 often signals the ICP sensor has been disconnected with the truck running. Did you unplug the ICP during your diagnostics? Is the engine oil full? What type of oil?

 

Watching this thread. I am thinking IPR is dirty or otherwise not operating properly OR the tuner chip you had is causing the issue. Nice to have a 7.3L rebuilt from scratch. Did you paint the block or heads while it was being rebuilt?

 

I used an Oreilly's code reader and could not erase the codes and I did paint the block with Chassis saver paint and did a touch up on the heads.

I never disconnected any sensors with the truck running. Truck had a miss when I was done rebuilding it. First thought was getting air out of fuel and oil, but has not changed after 70 miles. When I drove it to the dealer tonight it ran great til the last half mile, then the idle was at 900 rpm and had a slight miss.

I used walmart 15W40 diesel oil for the break in and to the top of the dipstick, 14 qts.

With it not running consistantly I was thinking a corrupted chip, plus I had no idea what kind of chip was in there. Better to get a known than deal with a unknown. that's why I thought get a reflash and start fresh. 5 codes was alot and just didn't feel right and all the sensors were not visually damaged. In addition to the truck just shutting off while idling, like you turned the key off and it would start right back up.

BTW the Ford OEM rebuild kit was awesome, it had EVERYTHING you need!

 

Was the rebuild kit two grand or less? I know clay has one for that amount. Don't mean to pry. Just curious.

 

What brand of CPS did you use?

 

Have you checked the oil lately? If you put only 14 quarts in a new engine then you are way low on oil! My engine takes 15 quarts for an oil change. But mines not a new engine. What about all the oil in the rails and injectors and the hpop of a new engine? I would think (just a guess) that the hpop and the engine would hold at least a quart and then some? I could be wrong but I would check your oil. Just a thought.

 

I got the Ford kit for about $1500, block was bored .30 over. If you use the IHC block make sure the block machined for a Ford. #8 has a different machine tolerance than the IHC 444. Engine was pre lubed to fill the heads, HPOP and oil reservoir, then 14 quarts. Oil is right to the top of the dipstick.
Ford dealer reflashed the PCM today, not that I hate dealers they have their place, just like a funeral home. You never go there unless there is a death. The truck runs EXACTLY the same as before, tons of zip like it still has a chip, SES light comes on & off and the same 5 codes as before;

P1280 INJECTION control Press circuit low

P0237 Turbo boost sensor low

P0603 PCM

P0478 Exhaust press control valve hi input

P0470 Ezhaust press sensor

ABS code is gone.

I had a 1999 Superduty diesel I just sold had a chip and this truck has the same power as my old 1999. Reflashing the PCM should have removed any old chip that was there, so I'm left scratching my head. I don't like to throw parts at something and hope it works. Has anyone ever rebuild the HPOP IPR?

Thanks

Kevin

 

Dealer did the CPS and Cruise recall today.

 

If the code reader can't clear the codes, I wouldn't trust the codes it's giving you. If it's throwing the SES light after hard acceleration, you're likely getting a P1211 code. That would be considered normal for a chip and nothing to worry about. Does the SES light go out after a few miles of driving?

 

Was your Exhaust Back Pressure Tube clean when you swapped everything over to the new engine? This is the tube that comes off of your Passenger side exhaust manifold and ends up attached to a sensor just behind your belts. A video of one being cleaned here. Let us know.
How to: Improve MPG on 7.3L Powerstroke - Cleaning EBPS - YouTube

 

It's throwing a code at idle and normal driving. Light comes on and goes off, more off than on. At idle in drive the idle is at 900 rpm, which is too high and in neutral about 700-750 RPM. I cleaned the tube, which was already clean, but not the sensor.

 

I'll go through the IPR tomorrow and see if I find anything.

 

Silly question, but have you checked your fuel filter?

 

Fuel filter and fuel are checked and good. I found that the ICP was leaking which makes it bad, replaced the ICP and it runs great. This truck sure runs like it has a chip in it. Wouldn't the PCM reflash removed the old chip?