RobM626

Hey guys I’m getting a code on a 08 mp7 mid 128 pid 94 fmi 7. Looked it up and says low fuel pressure. Driver said truck loses power when it comes on. Where would be some places I should start looking so I don’t have to bring the truck in to a shop and lose it for 2-3 days?

Yea I know I just loosen Ed them at the yard and tightened back up... I’m gonna grab new ones. Thank you

Cracked the caps open like you said and fuel equalized. Thanks, appreciate the advice... I personally never had a problem because I always put 80-85% in each tank. But I can’t stay on everyone’s ass with simple things such as fuel

Yea my 2000 has a vent with a plate and 2 screws holding the plate down. The 08 doesn’t have that from what I saw other day. I think the caps are vented on the 08

We’re they the newer style caps ? 08+?

Will check when he gets back tonight.

Yea tell me about it... this isn’t the first thing that’s happened after specific instructions to do or not do something... and then he calls me like “this or that just happened, I don’t know why, something is wrong with the truck” i would be too scared or embarrassed to call my boss if something happened that he specifically told me to do or not to do. I would be walking my ass to a gas station and buying a fuel can and fuel with my own money just so he didn’t find out I was screwing up the day or the truck

What’s up guys? I have 2 fuel tanks On my 08 granite with mp7. Driver has gotten lazy when fueling up and is only filling driver side tank 90% of the time and 2 times in the past 2 weeks the passenger side tank has run dry. The truck shut off both times and I had to fuel passenger side tank and re-prime fuel system to get it running again. I guess my question is does the fuel not equalize between both tanks? I told him to fill both tanks but he thinks he knows better than me and replies “but I never used to have to fill both. This never used to happen”. Is there a transfer pump between the tanks that could be bad?

Wow...I’m impressed. Especially with that VIAB!

It would be nice if Mack was able to take the reigns and design and build their own motors and transmissions again. I don’t think there’s one thing I actually like about Volvo’s products. not that Europeans don’t make a good product. They’re ahead of us with all types of technologies. But Americans did know how to make a tough and good looking truck

You have a point there.Multiple points!

I would like the 485 or 505 but I gotta see the price difference and see if it’s worth it we usually run one big lift axle that matches front tires so we’re not buying different tire sizes and can rotate the fronts to the pusher if need be. yea we need the wb to legally carry a half decent load. If I’m in nyc I can only carry like 56,000 once I leave the 5 boroughs I can carry 72,000, so the longer the better but then it’s a bitch to drive in the city when it’s too long and you got cars parked everywhere and can’t make turns. im unsure about the air rides. They must be very comfortable to drive but I get nervous about the stability and traction of them. I love the camelback . It’s rough riding but reliable. I like them better than the Hendrickson too. I notice a lot more people running 22.5 rubber as well

Those are beautiful trucks... that triaxle is nice and long too... i was thinking at least 455 hp. 20k front, 46k rear, 20k pusher, spring suspension, WB at least 237”, 17.5-18’ steel high lift dump body, and I’m leaning towards the Allison tranny because we’ve had good luck with them. Change the oil and filter once a year and it’s pretty much problem free... I get mixed reviews on the Eaton ultra shift. Whoever I know that is running them don’t really like them and said they have issues With them. The m-drive I heard people like and I believe they’re built for the job especially with those creeper gears. The reason I don’t really wanna go with the automated manual is because it still has a clutch as opposed to a torque converter and in the wrong hands has potential to be abused if not driven The right way. I know how to drive them correctly but some guys don’t. If they drive it like a regular automatic they constantly slip the clutch and heat it up. I just don’t wanna open the door to unnecessary problems on a brand new truck. What do you think? ih and geared low at least a 4.10 rear. I see some guys running even 4.80

Definately not legally. Body is like 19 yards. Truck empty is 31,000 ... I try not to put more than 20 tons but I usually have to carry 25-26 tons so that puts me at like 83,000. Whenever I can I try to not overload but with traffic here sometimes I don’t have time to make another load... if I’m hauling broken concrete which is what I’m doing most of the time I usually stay around 70-74000 because of the voids

What Mack technician did to that truck is the only real way to fix those motors without dumping a lot of money into the truck... got 2 AI motors that do the same thing, but selling one of them and the other we just deal with... I love though how we can come on here type in our problem and guys from all over the place know exactly whts going on and have a possible remedy. But if we go to a Mack dealership we have to spend countless money , put the truck down for days and weeks and they make us think we’re crazy. You came to the right place. These guys are great!

Yea I try to average my numbers using 8hours a day, 5 days a week. But we’re running like 12 hours a day, 6 days a week

Those numbers don’t seem too bad to me...I gotta look over my numbers and compare, but looks about same maybe a little lower. How many days/hours a week do those trucks work?

Hmm... everyone around here rounds them with double frames... After looking further into it I think they only do the gliders in a couple models. 388-389 and 5 something

I’ve spoken to a salesman there numerous times they can do the Pete’s as well... there’s a bit of a wait on them but it’s doable. A guy I know in Iowa got a mixer mounted on one and he loves it. Says it’s a beast. I Wish I lived somewhere else so I can get them and not have to worry about emissions laws going into effect

You can get a Peterbilt 388 with a dump body on it or just the chassis and have it sent to whatever upfitter you want

Were the test subjects for their r&d. And when there is a problem no one properly diagnoses the issue. They just throw parts at it on our expense and the root of the problem goes untouched

I had a sterling with a small Mercedes motor in it. I can’t recall exactly how many liters but definately less than 11. It might have been 9 or 10. And that motor would not get hot for the life of it in the winter. I had a heat exchanger installed on it that I plunged to the heater core that would heat the water tank for the concrete mixer and even at the end of the day that tank wasn’t as hot as the one on our mp8. So I dont know if that theory holds water?

I have had my eye on them for a few years now. I would absolutely love to get one but would be kinda pointless if I can’t run it in the city because it doesn’t have a dpf. 90% of our work is nyc

I know... the dump trucks we don’t really idle but the concrete trucks are running 8-10 hrs a day. There’s no avoiding it