Turbo and ECM performance/ need some help
Ok I have trying to find a common on these trucks as to way some run great with no problems with peformance upgrades mostly turbos and some not.The 03-04 trucks no problems slap a bigger turbo on and go runs great, no surging, good boost, lower egt, the way it's suppose to work. 06-07 trucks also don't have problems. Now 05 well some do and some don't, some surge, others can't build boost, and other just run same if not hotter egts.
Now let me explain about the way a turbo works, if you replace the smaller turbo for a bigger turbo you will have more air, which will lower egts, and give engine more power. It has too the turbo is flowing and cramming more air into the engine. If you are running smokey and high egts then more air will get rid of it (DIESELS).
So here's where I need help from all the members, and it will help out all the members in return. I have been getting in deep with the problems and I insured the guys that have my turbos that I would find out way some run great and other no so. The turbo is not the problem with any of the truck, the problem is the ECM(PMC) and the strategy code used.
The 05 trucks are different than any other year and here is why, in 05 Ford decided to try out things with the strategy and computers to fix some of the problems they were having. Why I don't know, but 05 trucks, some have MAF(Mass Air Flow) sensors, some have speed density, and other nothing at all. 03-04, 06-07 all have MAF sensors, now depending on the year depends on what the ECM is using the MAF for.
So what have seen is that the 05 that are MAF ones no problems while speed density are having the surging problems and the boost issues. The bigger turbo flows more air and the ECM puts in the input it has to go by so the vanes in the turbo are not where they should be,. I can give you and example of this in the Ford mustang 5.0 of late that have experiance in. The 1988 speed density must is a pain to upgrade performance in, just a simple cam change can cause all sorts of running issues. In 1989 Ford started to put MAF in the mustangs and they are a dream to modify, just becuase the ECM is using the MAF for it's calulations.
Now for the help, I need members with 05 trucks to go and look at the ECM computer they have record the number on the side of it DPU-??? , the strategy they have and if they have MAF, nothing or IAT( Intake Air Temperature or speed density). The ECM is located over by the drive side battery, right behide it on the inner fender. It has three plugs on it and you will see numbers on it I just need the ones after the DPU. The MAF will be right after the air filter in the intake tube with a plug hooked to it. The IAT sensor will only have two wires to it and looks like a oxygen sensor on the end of it. If you see nothing then you don't have either.
The Ford techs and help out alot, and if I got some of the info wrong like calling the IAT a speed density system, just trying to keep it simple. Well that's what I have so far, and of cousre the strategy codes correspond with the system the truck has. Thanks ahead for the help.
Last edited by madpowerstroke; 01-07-2013 at 08:32 AM.