EGR Cycle

[cooper09250]

Hello Everyone,

I have noticed my EGR has not been cycling on my DashDQ, since it has gotten cold....below 32 deg. I am running the Spartan 75hp no dpf tune, which should still cycle the EGR....any ideas?

[Arsenix2001]

Hey, i am having the exact same issue as you, and off the spartan forums it appears others are as well. I have an 08 450 and was running the 210 tune, i have the updated non coolant egr as my old one failed last spring. I noticed it wasnt cycling at idle anymore, so i loaded the 75hp tune and got response out of it fot about 30 seconds. 20% commanded slowly dropping down to zero then flatlined. I took the plastic actuator cover off of the egr and depressed the motor a few times and it was smoof as silk. Same crap tho, worked for 30 secs then nothing. Tried various engine temps to no avail, and out ambient temp was about 25, as night went on it dropped to 18 and she wouldnt open at all. Im wondering if this is something in spartans programming and the cold temps. I am going down to see my buddy (diesel master tech) at our ford dealer (hes letting me wash my truck in thier heated shop after hours cause its so &@$#* cold!) and ill see if i can talk him into running the ford scantool on the pcm and run some commands on the egr to see if its functioning properly. Ill report later tonight.

[Arsenix2001]

Ok, heres the beans... It appears the egrs are fine. I never had him hook up the comp, but, i did wash my truck and fart around for an hour and a half and then start it up. Temp reading on the iat was 67 in the shop and low and behold egr percentage popped up to 15 as soon as i tapped the gas. Cycled finefor 3-4 minutes and then within 30 seconds of driving outside with air temps of 25 it went to 0. Seems to be a temp programming issue. Oh well no cel or codes so works for me.