Onyx610

Possibly a engine position sensor or engine speed sensor. 

+1 on the reseal 👍🏻

Yup and they get extremely dirty. As for the high pressure switch it’s the one on the top of the dryer. Only ever seen one go bad. Wiggle it and the compressor would work and then you would have AC. Then later in the day there would be no AC. Wiggle it again to get it back in business. Finally just replaced it. 

3 hours ago, Joey Mack said:

a 'jug cant handle the volume of fuel that will be pumped...

Yup, more then likely what would be heard is “Shut it off! Shut it offf!!” 

We have those on our trucks and they are great, also very strong. You can get them with a small digital screen in the top that give you air temp/road temp if you want that. 

I’m sure you have pry fixed this issue by now, but something happened to come to mind. It’s pry not possible but I’ll throw it out there anyway….Any possibility with the egr valve? I know it has an electrical connector and is controlled by oil pressure. 🤷🏻‍♂️   

Cool, keep in touch. A few of the other guys I was talking about will probably chime in with some solid advice. 🍻

By the way fjh is reallllly good with this stuff along with a handful of others on here. 

No you read 9k right…🤣

keep an eye on oil level, could be injector(s)

Consider yourself lucky, ours happened at 9k miles. Highly doubt you will be able to get much more out of it. I could be wrong though. Ours was all from one cup leaking. I looked back to see what was done and all six injectors were replaced as they need to be for the updated “steel conical” cups. 

We had and 08 MP7 with bad cups. Very Extended start times but otherwise ran fine after start up. Also the oil level was growing. Ended up replacing the cups and 3 injectors. 

Interesting stuff….crazy to think that mack would farm out part production such as lifters to Bosch! The fuel pumps on the e-techs were the ones with the plastic gears and would spin on the shafts right? Damn 40 cams is pretty impressive…🍻

Did those part numbers work out for you? 

Yes thanks again. 👍🏻

28 minutes ago, Joey Mack said:

I believe you are correct 'sir'....   I call it Ceramic Cam Roller Sh1t...jojo Looking back..... I agree with 'V'  the early E-Tech wasn't that bad.  certainly better than the ASET CEGR..... jojo

Which ones were pretty well known for flaking/breaking cams? I heard a lot of “talk” about it, but never came across one. 

If you got the time and money I’d say it gets my vote for a second life. In the long run it’s still gonna be a lot cheaper and far less issues then a new truck, depending on what you consider buying…Plus a 91 ch is cool. Only downfall I could see would be getting parts idk. 

37 minutes ago, Vmac3 said:

The ASET came out in late 2003. With all the flaws the E-Tech had, looking back they were actually very good.

V

Correct me if I’m wrong, but isnt the ASET just an E-Tec with emission controls and different programming? For example having CCRS (current controlled rate shaping).   

AI is an ASET (application specific engine technology) with in cylinder EGR. Started in 02 I think which was the end of the “E-tec”. As for the performance on the E-tec 400 they are pretty good and the E-tec engines were the last of the better ones. If your coming from another truck and never had a Mack then most likely you will think it’s a “dog”. Mack’s we’re never fast or built to be, but they will pull anything. DieselDog is right about the gearing and trans with these trucks. What kind of truck is it that your looking at? 

When does it have extended cranktime? Have you checked oil level? Maybe check the fuel pressure once you know it’s gonna  start acting up? Maybe it’s a crank position sensor…could be alot of things. 

Awesome. Let us know how you make out. 

7 minutes ago, Joey Mack said:

is it the music stereo?    if so ....  expose all of the wires and record the color's and tracer's and look for a Vulva  stereo/with the harness, and 'relate' the wires to the color code.... or am I just talkin out my a$$ ?   jojo   oh yeah then use PTT to tell the truck it has a new stereo...

☝
this haha

Sorry do you have access to customer truck portal? If not I’ll look tomorrow, but the only GUs we have are a 07 and 19.  

Do you have tech tool? I’ve had good luck with finding wiring diagrams on there.