Quote:
Originally Posted by kraftchick
Mark...with the EGR valve unplugged, what should I expect when I crank it up...what will this tell me? And I'm sorry to ask something that has been explained already, but if the EGR valve isn't functioning properly...what does this do to possibly cause what I experience...no load and with load....overall performance is horrible compared to other stocks.
Also...I'm really really feeling like this isn't an engine power issue...but maybe something else....I get plenty of RPM's, boost, etc.....but increased throttle just isn't translating that engine roar into a lower gear and forward acceleration...at least not until I go WOT....only then do you feel it push you in the seat and scoot down the road. This is exagerated when towing a load (7500lbs).....in that case, I have to go to the floor earlier to get accelerated response. Could this thing need a re-flash?
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When you shut off your engine, the EGR valve should be closed (unless it is stuck open). Assuming it is closed and you unplug it, in most cases it will stay closed. This can help w/ the power issue if the valve is malfunctioning. If performance is better with the EGR valve unplugged, you have identified a potential cause. The EGR valve is a common source of "low power" issues. Also, a failed EGR and oil cooler usually means that your EGR valve saw excessivey high temperatures. This decreases its life.
Are you thinking that it is transmission related? Your PCM, ECM, TCM (processors) are all interconnected. They all talk to each other and depend on each other. The Torqshift is a VERY reliable transmission, but it is not infallible by any means.
It is very possible that it is a failing sensor and the PCM is limiting power. Finding this without codes is hard to do.
I highly recommend the new flash, but mainly for cold starts. It is not really geared to restore power, unless something w/ your current programming has been corrupted.
These 6.0's have plenty of power and 7500 lbs is nothing to one that is running properly. Most of my suggestions are to identify FREE things to try before you start parts replacement. One other thing that can mess w/ the power is a restricted air inlet.
I agree w/ cetane boost, but not really seen too many cases where it provided and real noticeable performance improvements. I am glad for Lazyl, but it is uncommon. The U.S. fuel is certainly marginal in meeting the minimum Ford cetane spec of 45 (U.S. cetane can get down to 38). I boost the cetane to avoid building carbon in the system.
