CocoSr

Just now, CocoSr said:

 

P.S. it does have a pyro but after ecm was programmed it doesn’t work the person that did it told me loosing your pyro was a downfall of it. 🤦🏻‍♂️

2 hours ago, mrsmackpaul said:

Does your truck have a pyro meter ?

I haven't ever had a turbo fail so I can't be much help

I wonder if it is getting to hot in the exhaust causing the turbo to seize ?

As I understand things, if the intake is restricted the exhaust gas temp will increase, boost will be lower and smoke will be plentiful 

On older coolpowered Macks 20 psi is the max boost, I  understand that it isnt that uncommon for modern trucks to make 40 regularly 

As much as it pain me to say this, and it really does pain me to say this, 2008 isnt modern, phew I cant believe 2008 isnt modern

 

Anyway what sort of maxmium boost would be expected from this motor ?

Paul

I appreciate you! I know the feeling on the 08 not being modern ! Haha ! Before the programming the truck used to boost 40 psi . After that 27-30 max and now 17-21 max I keep looking for leaks restrictions etc just have to keep digging. Thank You Much

 

On 7/3/2022 at 6:24 PM, theakerstwo said:

What happened to the old turbo? did it blow up or just stop making boost?

Old Turbo seized bud was also boosting low after delete

Hello , 

Just wondering if anyone else has had these issues; I lost my turbo and replaced with a reman truck will not boost over 18 pounds it also vibrates and hesitates when I get on it which it was doing before the turbo & it actually used to boost 30 pounds, Before truck had an ecm re tune it boosted up to 40 pounds stock . 
Thanks in advance.
PS. It’s a 2008 MP8 

Good morning & Happy 5th ! I have a 2008 Mack with steering axle hub caps that you can’t check …. Hard grease I’m assuming but they are so tight I can’t get them off ! 
Before I cut them off , Does anyone else have this ? How do you check the lube ? 
Thanks in advance 

Thanks so much

Thank You! Super helpful info

2008 Mack CHN Mp8 18 spd 

Good evening friends , 

Today at an intersection I went to take off and my truck wouldn’t accelerate, it gave me enough to crawl out of the way and with parking brake on , it would accelerate with no power after a while I shut truck off for a few minutes, started it up and ran fine rest of the day. Anyone experience this before ? Thanks in advance. 

Thank You! Gonna ask my oil supplier about it 

Central FL , Davenport 

On 3/3/2021 at 9:33 PM, Mackpro said:

It’s for your cab power. They do go bad . Mack later changed the set up to a large fuse instead of the breaker style you have . 

Yes sir! I will feel better having them done I used to have an ISX and everyone said I didn’t need to touch it till a million I had it done @ 600,000 and they were bad

An update! He turned the fuel down problem solved

I saw the one Mack offered, I didn’t buy it cuz I can’t reset it ... can’t find the same one anywhere, Has anyone bypassed theirs ? 
Thanks

Thank You Gentlemen! 
1sr try will be the oil analysis! 
You guys rock 👍

On 3/9/2021 at 7:16 AM, Joey Mack said:

You can drop the oil pump and the main at No.7 to check the health of the bearing and oil pump. It's a "Job". you have a large stiffing tray and oil pick/up tubing with orings to replace, and a boatload of bolts to remove.. You can also cut open the oil filters to check for metal flakes but thats still not going to pinpoint where the metal came from..  So my guess Is to weigh the reasons, and decide... The lower end Is a quaility lower end, and the work to do a good bearing job is much higher than an E-7/E-Tech..... I expect more comments from our Canadian friends on this one, as they are still working on this series of engine today.  OK "V" and "F".. You're next..  Jojo

I guess it’s more peace of mind for me 

Good Evening! 
Just want some input ....Should I have rods & mains bearings done on my mp8 since it has 745,000 miles on it ? Thanks

I appreciate it ! Thank You! Will replace right away.

Hello , 

My 2008 Mack has a 150 amp fuse/relay w red wire that goes to who knows where I can’t tell , the truck completely dies, lights engine , everything! When this happens I have to wait a minute or so when it clicks I can press the button and it comes back; Very dangerous. 
Any ideas ? Thanks in advance.

I appreciate that ! I noticed today if I don’t stomp on it while up shifting it’s fine but I will ask that , he’s local and has done most of my friends trucks some told me to change stat some told me to take it out cuz we’re in FL. Thanks

Ya I’m having same issue, running hotter when I take off going thru gears loaded , my tuner told me to either take out stat and or I can come by and he’ll change fan settings... also told me not to block off egr... So confusing