7.3 2001 F250 Lariat Fuel Issues - Ford Powerstroke Diesel Forum
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Old 02-12-2012, 11:12 AM
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7.3 2001 F250 Lariat Fuel Issues

Hey I am just wondering if anyone can help me out with my poor milage issue? i am getting 10mpg, I have a cortex 1950 programmer and I have set it on Milage XS and performance and i notice a power difference but not difference in fuel economy, I have changed the fuel filter on the top of the engine and the air filter. I also disconnected the EBPV valve and did not notice a difference. I have 3.5" exhaust with only a muffler on it, and 400,000 kilometers on the truck. Also during cold days my truck will not start without being plugged in. I believe this is because my starter is not turning the truck over fast enough with the thicker oil. I have 2 new batteries and charging system seems fine. any ideas?
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Old 02-12-2012, 12:20 PM
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Quote:
Originally Posted by Dobbelaar View Post
Hey I am just wondering if anyone can help me out with my poor milage issue? i am getting 10mpg, I have a cortex 1950 programmer and I have set it on Milage XS and performance and i notice a power difference but not difference in fuel economy, I have changed the fuel filter on the top of the engine and the air filter. I also disconnected the EBPV valve and did not notice a difference. I have 3.5" exhaust with only a muffler on it, and 400,000 kilometers on the truck. Also during cold days my truck will not start without being plugged in. I believe this is because my starter is not turning the truck over fast enough with the thicker oil. I have 2 new batteries and charging system seems fine. any ideas?
Sorry to hear that on the 10 MPG, I'm getting 14 out of my dually right now. The EBPV is needed during cold weather, do you have it set correctly? Why did you disconnect it? I know this sounds stupid but your air filter is okay isn't it? Are all of the intake clamps/hoses tight? Tell us what your engine is doing, is it knocking? Does it smooth out when it gets warm, etc. A video would be a great start. I got a ton of responses with my youtube video. Here is my vid, see if yours seems to do the same.
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Old 02-12-2012, 12:36 PM
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Great video, My truck turns over about half as fast as yours does. When mine fires it runs no problem. It does not smoke when turning over. I have a brand new air filter, I disconnected the EBPV to see if it ran any different, when disconnected it should remain open I believe. I plan on hooking it back up in the morning. I brought the truck to ford and all they told me was the air fuel mixture and everything looks correct and there was no codes. I have a list of codes from the truck i will get them from work and post them this week.

some are
P1316
P1270
P0340

the truck was ran low on battery before they were cleared just a note
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Old 02-12-2012, 12:49 PM
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P1316 Injector Circuit/IDM Codes Detected
P0340 CMP Sensor Circuit Malfunction

So you're getting the Injector Drive Module and Camshaft Position Sensor codes, that is where I would start. That CMP sensor will make it run horribly if plus they're cheap to replace. Also check your ICP sensor to make sure it isn't all crudded up.
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Old 02-12-2012, 12:50 PM
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Where is the ICP sensor?
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Old 02-12-2012, 12:58 PM
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Originally Posted by Dobbelaar View Post
Where is the ICP sensor?
On top of the driver side valve cover. Unplug it, take it out clean it up, stick it back in see how your truck does. The easiest way to tell if its bad is to unplug it start your truck, if it sounds the same or throws no CEL the sensor is bad, if it throws a code and runs like crap it should be ok.
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Old 02-13-2012, 10:23 AM
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I removed the ICP sensor wire connector and the plug itself was Soaked in oil. Does this Mean Anything?
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Old 02-13-2012, 10:47 AM
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Originally Posted by Dobbelaar View Post
I removed the ICP sensor wire connector and the plug itself was Soaked in oil. Does this Mean Anything?

Did you try starting it with the sensor unplugged? Did it sound differently than with the sensor plugged in? Did it throw a Check Engine Light?

They will get all cruddy, you just have to clean it up, is there oil in the pigtail?
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Old 02-13-2012, 10:54 AM
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Yes there was oil all over the pigtail, I am assuming in it aswell. When disconnected it did run kinda the same but had alot less power and check engine light was on
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Old 02-13-2012, 11:10 AM
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If there was little to no change when you disconnected it, then it's time to replace that thing, it should have ran completely opposite of normal with that unplugged. Double check it again, it doesn't take but a few seconds to do it. Throwing the CEL when that is unplugged is normal, but if the running condition is even close to the same as your normal condition, your ICP is sending the wrong signals back. Did you say you had AutoEngenuity?
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