Mackpro

That cheap compared to a 04 and up Ac ASET turbo $3,000+

Its the electronic unit pump. All ETECH style engines have 6 of them . They all look exactly the same but there are 3 different part#s due to the ETECH 98-2001, CCRS 2002-2003/AI 2003-2007 and the AC 2004-2007. You can actually mix them all up and put them in different engines and they will run but not good(low power). We went to our independant pump shop and they could rebuild our EUP's but cant get parts from Bosch.

Mack says it's Bosch's fault, but that dosent matter to the customer as his truck is setting here with 2 bad EUP's.

Try an order a EUP for a 2002 CCRS etech or 2004 AI ETECH 1,500+ on backorder and no shipment till after newyears. We are robbing our junkyard engines to keep our customers going.

Even the MP engine parts can be hard to get. A new recall just came out today on all early MP8 turbos. Found 5 of my customers needed the new turbo. Went to order parts and a big"0" on the turbos. Why issue a recall on turbos when you dont have any?

Also does it have a auto shift or ultrashift trans? If so the engine brake will engage to help the trans shift even if you got the brake turned off.

If the engine has the "powerleash" engine brake, the o-rings on the engine brake solinoids could be bad/cut and causing oil leaking into piston area and slightly applying brake. We have seen this before quite often. As far as the low power, read some of the posts on the 460 HP CV's and about going to the dealer to get both ECU's reflashed with the new software for poor throttle responce. Need last 6 of the vin and I can tell you if it need the new software.

I think if it dosent have a "red" motor in it MACK/VOLVO dosen't care if you get parts or not.

There are 3 different EUP pumps. A different on for each type of engine, ETECH, CCRS/AI ETECH and AC ETECH. You have the the AC version. Hope they have them in stock. The EUP for the AI ETECH is on backorder, 1,5032 are on back order and we have a truck with 2 down and wont get one till after new years. Truck still runs but has codes and a rough idle, going down the road , its OK.

Have them contact their "Distric Service Manager" DSM and he can get somethings done. We had to do this on a truck with low power. Our DSM let us take truck to a Dyno shop and see the real results on paper. Truck should put 80 to 75% of rated power to the ground. Engine usually lose 20-25% through the drivetrain. Our truck had bad injectors and was 6 months old with less than 30,000 miles. Call Mack and complain- 18008661177

It's OK for the oil temp to get as high as 250 with no effect on power. Mack has a service bulletin on this. Is fan clutch stayin on all the time?

We have been buy all the Flying J trucks we can find. We have been flying our guys to to Salt Lake City and all over to pick them up and bring them back here to fix up and sell. We also bought a fleet (17to 22 trucks) that are just like the Flyin J trucks, they came from Florida. We have sold almost all them. People here just love the auto and ultra shift trans. We like to get the 2000-2003 trucks to sell due to pre-EGR engines. These trucks are getting hard to find now ( at a decent price).

Whats the last 6 of your vin and I will compare the software it to whats in my friends 6 CV's that are 2007 460 HP's

I just call Mack Tech Support and give them the model and last 6 of vin and tell them I want the throttle responce software and datafile, and they turn it on in the mainframe, then I shoot it in the truck. Dont really have a part# of a file that I ask for, however I do hear the talk about a "step 12B" program.

We have seen it alot. The fan ring part# has been updated 3 times however it dosent say if it was improved. The warranty is only 1 year/100,000 miles on the fan ring so most guys just make some oversized plates and sandwich them over the fan ring and use longer bolts. There is a Mack service bulletin on using longer screws but this has nothing to do with the ring itself breaking around the mounting brackets. This has been a problem all the way back to the early CTP's and CXP's with the first MP7 engines.

Those gears and tire size are good, just dont go and change over to tall 24.5 tires as you might be undergeared. We had sold a customer a 3 new CV's with 460's a couple years ago and one was a dog. We had it put on the dyno and it was truly weak. We changed the injectors and then all was good, must have got some water in the fuel or just some screwed up injectors. Now it runs the same as the rest.

30 psi is kinda on the low side of specs ( 30-38 psi at sealevel full load) I would have a dealer go ahead a do the reflash for the throttle responce program and have them test the aftercooler and piping. The after cooler piping has 90 degree elbow on top of the intake manifold , the worm gear clamp gets loose and the o-ring sometimes blows out and you loose boost pressure. There is a new style clamp for this, Mack had a service bulletin on it.

Thanks for the info, we got busy with other things and havent had a chance to follow up on looking for the part#.

Does your engine have a coolant filter on it? The reason I ask is around 2001 mack started making the coolant filter optional( I think about 50-75$) and alot/most all of fleet trucks were built with out them. Fast forward to today and most fleets and 2nd owners didnt keep the PH/DCA "whatever you call it" levels correct and it would eat the block up where the liners rest on the ledge in the block and block pitts up on the ledge and leaks coolant past the liners into the oil pan. Now when this happens we usually remove the liners and cut out the pitting and put shims in to raise the liner back up to specs. And of course use new liners and rings and rod and main bearings. This is what we call a mini-overhaul, reuse the steel pistions and heads.

Also what rear gear ratio, transmission and tire size do you have. The most AI engines has a small torque curve and if everything isnt right the performance will suck. I know for a fact that a AI engine with a Fuller 8LL and 4.17 gears and tall 24.5 tires has no low end and takes forever to get going. 4.42 and 4.74 work the best with tall 24.5 tires ( the 4.74 hurt the top end alittle). We no longer order/use the Fuller 8LL due to less warranty and the Mack trans seem to be geared better (love the 310M or the Mack 13-18 speed). We have had to regear so trucks up to the 4.42/4.74 Good Luck

Take it to a Mack dealer and tell them you need the "throttle responce" file flashed on your VECU and any available data files and software for the EECU. The download from Mack is free to the dealer, you should only have to pay for the time/labor to install (2 hr usually) They will have to call Mack tech support and have them turn it on. We do this about once a week and it makes a big difference in power and of course throttle responce between the gears. Do you have a turbo boost pressure/ manifold pressure guage in upper left corner? Should be atleast 30 something + at full load, more boost the better.

Take it to a Mack dealer and tell them you need the "throttle responce" file flashed on your VECU and any available data files and software for the EECU. The download from Mack is free to the dealer, you should only have to pay for the time/labor to install (2 hr usually) They will have to call Mack tech support and have them turn it on. We do this about once a week and it makes a big difference in power and of course throttle responce between the gears. The gear ratio is perfect for tall 24.5 tires. You might change the #4 EUP if after the downloads dont help enough. The new EUP must be calibrated at a Mack shop to be right.

Make sure they replaced the oil cooler inlet screen as this usually clogs and overheats egr cooler and it cracks. Part # is 25099919, if it wasn't replaced you could be doing this all over again.

Looks like a E-7 in an MR. An E-6 would have lifter covers/sideplates on the block behind the injection pump.