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Old 05-22-2014, 12:25 AM   #1
komoto123
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EGR delete question

Anyone know if i NEED to get a tune if i do a manual egr delete? Or can i run with out the tune?


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Old 05-22-2014, 12:26 AM   #2
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Yes you would need a tune or the check engine light will always be on.
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Old 06-26-2014, 01:55 AM   #3
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What if i kept rpm just above idle by adjusting the throttle body accelerator cable, so that the computer never would get the signal from the tps that its at idle? Will the check engine light come on still?
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Old 06-26-2014, 11:18 AM   #4
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I doubt it would prevent the check engine light. But my question is why bother? It is a mod that has practically no benefit.

From another thread:
Quote:
if working correctly EGR is transparent. They often do not work correctly. The are superfluous in a performance arrangement, extra weight and complexity. If it is working correctly, nothing but loss of mid range fuel mileage will occur by removing it. (then you have to convince the DPFE not to code, if you remove w/o a flashing it out of the computer).
http://www.focusfanatics.com/forum/showthread.php?t=242676
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Old 06-26-2014, 01:16 PM   #5
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Quote:
Originally Posted by crazy_urn View Post
I doubt it would prevent the check engine light. But my question is why bother? It is a mod that has practically no benefit.

From another thread:


http://www.focusfanatics.com/forum/showthread.php?t=242676
The main reasons for removing it will be to clean up the engine bay a little, and i also don't like the concept of putting my dirty exhaust back into my intake. I know it is very little but i don't like it regardless. As for the mileage quote from the other thread. I am guessing it will only make a +/- 2 mpg on the city estimate, which i am not worried about at all.
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Old 06-27-2014, 05:48 AM   #6
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Idle speed has nothing whatsoever to do with EGR coming on or off. PCM knows when to put it on and several things feed into that. You CANNOT make it not operate without a CEL, tune only.

And, wanting to 'adjust' the throttle cable shows you have a way to go yet...............you never touch that. How you get into idle hanging issues, like 5 million other guys.
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Old 06-28-2014, 12:01 AM   #7
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Quote:
Originally Posted by amc49 View Post
Idle speed has nothing whatsoever to do with EGR coming on or off. PCM knows when to put it on and several things feed into that. You CANNOT make it not operate without a CEL, tune only.

And, wanting to 'adjust' the throttle cable shows you have a way to go yet...............you never touch that. How you get into idle hanging issues, like 5 million other guys.
How do you think the PCM knows when to turn it on?? Rpm is one of those things. I have adjusted my throttle cable on my ranger plenty of times with no hiccup. Perhaps you could have just left out that last part and your reply would have been somewhat helpful.

Last edited by komoto123; 07-04-2014 at 11:22 PM.
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Old 06-28-2014, 12:07 AM   #8
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We've seen many folks do that and the computer will bring the idle back to where it's programmed too after a few drive cycles. Then some folks start having issues since they adjusted it. You could make it idle at 2k rpms but it will try to idle down to where it's supposed to be and then it will idle like crap because of that.
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Old 06-28-2014, 12:12 AM   #9
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Quote:
Originally Posted by sleepyboy View Post
We've seen many folks do that and the computer will bring the idle back to where it's programmed too after a few drive cycles. Then some folks start having issues since they adjusted it. You could make it idle at 2k rpms but it will try to idle down to where it's supposed to be and then it will idle like crap because of that.
I don't see how the computer would adjust itself back down. It would be like i am giving it gas all the time. Does the computer require a readout of a idle rpm?
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Old 06-28-2014, 01:34 AM   #10
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Here's a link that will take you to a listing including the info. on how the EGR is checked:http://www.focusfanatics.com/forum/showthread.php?t=214389

I'll third the comment that idle speed will eventually adjust to target, within the capabilities of the IAC to do so.
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