I NEED HELP WITH PCM/ECM?
Thread Starter
|
Freshman User
Joined: Nov 2012
Posts: 30
Likes: 0
Sorry i cant contribute to your thread but I had to ask. Thats really cool, i actually love that show and your brother and nephew and Cody are my favorite crew. Least amount of drama and all about business, and seemingly great people. Id do anything to work for them so if they need any help im your guy. Good luck with your question and sorry to be off topic. 
Just so all those high compression diesel owners out there know we run nothing but diesels here. Diesel is a little less expensive than gas and gas is right around $6.00 a gallon. We got chevys-6.2's, fords-7.3's, cummins, cats, Detroits, Isuzus, perkins, and ??? Almost everything Steve has is a diesel.
Cargo Master
Joined: Mar 2006
Posts: 2,502
Likes: 2
From: Bend Oregon
From everything you have stated my best guess would be it is the programmer. IE it runs with no chip installed, runs when you pull the chip.
I am wondering about something though and maybe this will open the question up a little more.
In stock form when the IPR sensor fails the PCM defaults to a preset table. Is that same table present when you are running a chip? What if the IPR sensor failed and the default fueling table wasnt present?
One other question
Do you have a check engine light when running now without the chip?
Thread Starter
|
Freshman User
Joined: Nov 2012
Posts: 30
Likes: 0
No I do not agree:
From everything you have stated my best guess would be it is the programmer. IE it runs with no chip installed, runs when you pull the chip.
I am wondering about something though and maybe this will open the question up a little more.
In stock form when the IPR sensor fails the PCM defaults to a preset table. Is that same table present when you are running a chip? What if the IPR sensor failed and the default fueling table wasnt present?
One other question
Do you have a check engine light when running now without the chip?
From everything you have stated my best guess would be it is the programmer. IE it runs with no chip installed, runs when you pull the chip.
I am wondering about something though and maybe this will open the question up a little more.
In stock form when the IPR sensor fails the PCM defaults to a preset table. Is that same table present when you are running a chip? What if the IPR sensor failed and the default fueling table wasnt present?
One other question
Do you have a check engine light when running now without the chip?
Thread Starter
|
Freshman User
Joined: Nov 2012
Posts: 30
Likes: 0
No I do not agree:
From everything you have stated my best guess would be it is the programmer. IE it runs with no chip installed, runs when you pull the chip.
I am wondering about something though and maybe this will open the question up a little more.
In stock form when the IPR sensor fails the PCM defaults to a preset table. Is that same table present when you are running a chip? What if the IPR sensor failed and the default fueling table wasnt present?
One other question
Do you have a check engine light when running now without the chip?
From everything you have stated my best guess would be it is the programmer. IE it runs with no chip installed, runs when you pull the chip.
I am wondering about something though and maybe this will open the question up a little more.
In stock form when the IPR sensor fails the PCM defaults to a preset table. Is that same table present when you are running a chip? What if the IPR sensor failed and the default fueling table wasnt present?
One other question
Do you have a check engine light when running now without the chip?
Cargo Master
Joined: Mar 2006
Posts: 2,502
Likes: 2
From: Bend Oregon
I wasnt asking you specifically on the other issue just a general question hopeing maybe someone with the awnser would post up the info.
opps, I was refering to the ICP SENSOR not the regulator. In stock configuration with no chip if ICP Sensor fails then the computer begins fueling the engine based on a lookup table for ICP present in the PCM. When the sensor is working the PCM fuels the engine using the ICP (pressure) reading from the ICP sensor.
So my question was if the ICP sensor failed with the chip you where running was that default fueling table there to allow the engine to run? or did it just see the failed value reported from the ICP sensor and not fuel the engine?
It would be a good idea the find out what the CEL is all about, AC code sticks on stock programming....yeha they wil have a lopey idle but they shouldn't throw a code
Thread Starter
|
Freshman User
Joined: Nov 2012
Posts: 30
Likes: 0
Chip problems
Thanks for the input Steve,
Personally I believe the the motor runs fine, even though it lopes. I think everything is working normally and the only problem is there are AC injectors receiving the information from all the systems, instead of stock AB's.
When the left bank died, I eventually pulled the chip after checking the left bank injector/glow plug harness, and the truck immediately ran fine except it had the lope. I just don't see how the IDM (Injector driver Module) would stop the chip from working as chip supplier says. If the IDM was bad, it would be bad with or with out a chip, that's the way I see it.
Dave
Personally I believe the the motor runs fine, even though it lopes. I think everything is working normally and the only problem is there are AC injectors receiving the information from all the systems, instead of stock AB's.
When the left bank died, I eventually pulled the chip after checking the left bank injector/glow plug harness, and the truck immediately ran fine except it had the lope. I just don't see how the IDM (Injector driver Module) would stop the chip from working as chip supplier says. If the IDM was bad, it would be bad with or with out a chip, that's the way I see it.
Dave
Postmaster
Joined: Jun 2010
Posts: 2,555
Likes: 9
From: Longview, TX
It would be a good idea to find out what is throwing the CODE to set the CEL.
I wasnt asking you specifically on the other issue just a general question hopeing maybe someone with the awnser would post up the info.
opps, I was refering to the ICP SENSOR not the regulator. In stock configuration with no chip if ICP Sensor fails then the computer begins fueling the engine based on a lookup table for ICP present in the PCM. When the sensor is working the PCM fuels the engine using the ICP (pressure) reading from the ICP sensor.
So my question was if the ICP sensor failed with the chip you where running was that default fueling table there to allow the engine to run? or did it just see the failed value reported from the ICP sensor and not fuel the engine?
It would be a good idea the find out what the CEL is all about, AC code sticks on stock programming....yeha they wil have a lopey idle but they shouldn't throw a code
I wasnt asking you specifically on the other issue just a general question hopeing maybe someone with the awnser would post up the info.
opps, I was refering to the ICP SENSOR not the regulator. In stock configuration with no chip if ICP Sensor fails then the computer begins fueling the engine based on a lookup table for ICP present in the PCM. When the sensor is working the PCM fuels the engine using the ICP (pressure) reading from the ICP sensor.
So my question was if the ICP sensor failed with the chip you where running was that default fueling table there to allow the engine to run? or did it just see the failed value reported from the ICP sensor and not fuel the engine?
It would be a good idea the find out what the CEL is all about, AC code sticks on stock programming....yeha they wil have a lopey idle but they shouldn't throw a code
Hotshot
Joined: Jan 2011
Posts: 18,849
Likes: 179
From: Puget Sound
For the sake of making this brief, I'll call the Look-Up Table a LUT. Just what we need, more acronyms.
There is more than one LUT for the ICP/IPR. There is the "Ah, I have feedback from the ICP... so I'll run normal" LUT. There is also the "Uh-oh, I have no ICP signal at all. I'd better run with the stock limp-home settings" LUT. No tuner in their right mind would want to mess with limp-home mode, so it's just sitting there until called upon.
I had to use mine not long ago when my ICP went bad. Here is what happens with an oily ICP - the oil in the connector changes the feedback voltage to read higher ICP than actual. This makes the PCM lower the IPR signal, giving you less oomph. If it was the other way around, the ICP sensor would read low ICP and jack the IPR up. Recapping (because this is big): If the ICP sensor said you had 1500 PSI ICP, but you really had 2200... the PCM would alter the Fuel Injector Pulse Width and timing for 1500 PSI and this could at the very least cause a lot of heat, smoke, and knock. No need to dwell on the worst-case on this, because the Ford (or IH) engineers thought ahead and configured the system to give less fuel and timing in the event of sensor failure or oil in connector. You don't think the 7.3L was their first rodeo, do you?
Tuning, loping idle, and AC sticks: I have stage IIs and a silky idle. The lope is actually very difficult to eliminate, if the tuner is not sitting in the truck. It can be done remotely with the "Ooops, too little. Ooops too much" procedure, but DP or a Hydra would make this so much easier because of the ability to email tunes. Here's the caveat, and my reasoning for bringing up a 100% truck: Say you get it dialed for a silky idle... but you have a flakey sensor in the truck. You finally discover the flakey sensor and replace it... now you have lope idle again. My truck has over 1/4-million miles and more than a decade in the elements, but "Stinky" is 100%. All sensors read in the green, everything functions as it should, and my tunes worked right out of the box... with the smallest of tweaks needed for perfection.
Since I have so much faith in the condition of Stinky, I had him live-tuned to dial my non-stock transmission and to "personalize" my tunes for my style of driving. Any grandpa could drive my 375 HP Daily Driver tune and never know the truck is jacked up on steroids... at least not unless he went diggin' for gold with his right foot. That's how a tuner should make his tunes... IMHO.
There is more than one LUT for the ICP/IPR. There is the "Ah, I have feedback from the ICP... so I'll run normal" LUT. There is also the "Uh-oh, I have no ICP signal at all. I'd better run with the stock limp-home settings" LUT. No tuner in their right mind would want to mess with limp-home mode, so it's just sitting there until called upon.
I had to use mine not long ago when my ICP went bad. Here is what happens with an oily ICP - the oil in the connector changes the feedback voltage to read higher ICP than actual. This makes the PCM lower the IPR signal, giving you less oomph. If it was the other way around, the ICP sensor would read low ICP and jack the IPR up. Recapping (because this is big): If the ICP sensor said you had 1500 PSI ICP, but you really had 2200... the PCM would alter the Fuel Injector Pulse Width and timing for 1500 PSI and this could at the very least cause a lot of heat, smoke, and knock. No need to dwell on the worst-case on this, because the Ford (or IH) engineers thought ahead and configured the system to give less fuel and timing in the event of sensor failure or oil in connector. You don't think the 7.3L was their first rodeo, do you?
Tuning, loping idle, and AC sticks: I have stage IIs and a silky idle. The lope is actually very difficult to eliminate, if the tuner is not sitting in the truck. It can be done remotely with the "Ooops, too little. Ooops too much" procedure, but DP or a Hydra would make this so much easier because of the ability to email tunes. Here's the caveat, and my reasoning for bringing up a 100% truck: Say you get it dialed for a silky idle... but you have a flakey sensor in the truck. You finally discover the flakey sensor and replace it... now you have lope idle again. My truck has over 1/4-million miles and more than a decade in the elements, but "Stinky" is 100%. All sensors read in the green, everything functions as it should, and my tunes worked right out of the box... with the smallest of tweaks needed for perfection.
Since I have so much faith in the condition of Stinky, I had him live-tuned to dial my non-stock transmission and to "personalize" my tunes for my style of driving. Any grandpa could drive my 375 HP Daily Driver tune and never know the truck is jacked up on steroids... at least not unless he went diggin' for gold with his right foot. That's how a tuner should make his tunes... IMHO.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
Thread
Thread Starter
Forum
Replies
Last Post