Mackpro

Remember that 2010 and up SCR/DEF trucks have 2 NOX sensors

We sold alot of CTP and CXP trucks because everyone knew the DPF engines were coming out the next year. Every one that we sold are still running. We had a few with broken rings , bad cams and turbos and that was worst that we saw.

You could only get a MP-7 (non-DPF) in a CTP, no MP-8 for that model. The CXP and CTP were only in 07 i think. You could get the 7 or the 8 in a GU. I dont know about the frame differences if any.

We have seen this alot. We have not found an answer. We have seen the discharge line fitting get clogged with carbon and be slow to build up air. We remove fitting and clean out and all is good for a while.

Yes , It should work on all ETECH's that are 427 or 460 HP with the plastic fuel return line from the heads to the overflow valve on the side of the block. Not all 2002 engines are CCRS, I have seen regular ETECH's in 2002. The plastic fuel return line gives it away as being a regular ETECH engine.

Yes , It will.

Did the issue ever get resolved? I just hear from someone at Mack that the twin-Y ride rear suspension is to blame. Have you had the "trailing blades" replaced with the new ones that have the thick piece of plate steel riveted inside. I have done 4 so far here at our shop. The guy at Mack said the orignal trailing blades were to thin and flexed causing steering issues.Sorry I didnt read all the post's and now see you did get the issuse resolved.

In 07 you could get the CTP or CXP with a MP-7 with no DPF exhaust filter. No MP-8 option for that year. In 08 the MP-8 came out and it and the MP-7 came with the DPF exhaust system. The model names changed to the GU, CHU, CXU, MRU and LEU.

To do it right would require lots of parts I would think. A combination of ETECH and CCRS parts might work.

Its a switch on top of the transmission, looks like a reverse light switch. Just a few of the Mack trans have them. I assume only the ones with extra low hole

On the injectors you have to use 1999/2001 ETECH injectors. The CCRS and AI/AC ASET injectors will not work at all as they have no fuel return out of the injectors. The 99-01 ETECHs have a plastic fuel return line out of the top front or top rear of the head down to the fuel overflow valve on the RH side of the block above the air compressor. The CCRS and ASET engines do not have this plastic line.

I do it all the time. They need to act like they are reflashing/reprograming your current engine ECM to the VIN of the 460XT truck. The same a customers buying used ECM's and bringing to us to have flashed/programmed to their current truck. As long as your current ECM part number matches ( or is on the list for possible matches) the part# of the 460XT truck. The vechicle ECM in the cab stays the same and is not programed.

Specs on a E6 4 valve head are 19-27 psi of boost at full load

A 93 400 VMAC should be around 24-32 psi of boost according to the 1993 Mack tune up book. Maybe blown intake gaskets. They now have steel core intake gaskets

It wouldn't hurt to put them on. Also when changing your fuel filters. When u fill up your filters before you install them, make sure the fuel your pouring into them is very clean. We have a old MP filter stand mounted on our fuel dolly and small electric pump. The pump pulls the fuel through the filters on the filter stand then out the hose into the new filters to be installed on the truck that we would be servicing.

If the trucks under warranty and the injectors fail, the dealer will install the filter kit under warranty. Otherwise if you want it , you gotta pay for it. They are easy to install. Here is the bulletin. On trucks that are in any type of dusty condition at all , we install the one big filter and its works with one or two fuel tanks. For all other trucks we install the small filters that bolt behind the fuel tank. One kit per fuel tank is required. Fuel tankfilter.pdf

Yes on the new injectors, they seem to have solved that problem. And yes on dust in the air being drawn in through the fuel tank vents and passing through the filters and eating up the injector needle. The old ETECH style injectors worked on about 3000-4000 PSI of pressure where the MP engine is in the 33,000 PSI range. Only takes a speck of dust to mess one up. Its really bad on a local fleet here that pumps off powered cement. The large amount of dust in the air and the big engine fans on the new trucks stirring it up kept us busy with injector kit installs. There is now air filter kits for the DEF tank vents too.

Probably needs an injector kit. We were doing 1 or 2 a week here but have seems to slowed down now. Usually driver will complain at first of a vibration then as times goes by it gets worse and becomes a miss. No fault codes and usually from 60 to 95% engine load. Some cleared up at 100% engine load. If the EGR system all checks out we replaced the injectors and cups and add the fuel tank air filter kits( very importaint). There are a few different kits out there depending on the actual build date. We always call the Mack Fuel Injector Hotline ( yes that have one) to make sure we get the right kit. injector miss.pdf

I think that recall was for 92-98 VMAC1 and 2"s. I looked in the Mack dealer recall list and it dosent go back that far. I have done 2 or 3 trucks using that CL VIN and all seemed super happy with the results. On another friends 2005 CV713 with a 427 AI engine . I submitted a HP request to Mack to bump it to a 460. They denied it saying the EPA would not let them due to only allowing so many of the higher polluting HP motors out there for that year model. . He is currently waiting for the day his turbo goes out and we are going to put on a 460 turbo ( On the AI engine, 427 and 460 turbos are different) and use a different VIN with a 460 to program with. I'll will attach a homemade chart on the 4 different Etech style engines ( Etech, CCRS, ASET AC and ASET AI ) and it will show the turbo and injector differences in the different HP ranges. I only included the most common HP variants. Some of the HP levels I left out like the 275, 300, 330/350 and so on. scan0164.pdf

I personally did my buddies 99 RD . Engine was a 400 and I put the turbo and injectors and 460 program in. Knowing that we would probably have to install the offset key way in. He ran it a few months till the summer hit and he couldn't keep it from over heating. Maybe the bigger CH radiator would keep it cool. This is the only time I have tried this. Swapping the key way would not be bad if they had threaded holes in the cam gear where you could use a puller on it. This would keep you from pulling the cam all of the way out and saving lots of time. I have hear of someone heating up the gear with a torch and popping it off while still in the engine but the uneven heating and uncontrollable temps could not be good.

By the way, this CL has the 92 series rear carries and about every 6 months he snaps a axle shaft or through shaft, he has a torque limit switch but leaves it unhooked. It's a tri axle dump and this only happens on soft ground. Be easy on soft ground with the 460XT

Yes it has the Jacobs brake and air fan clutch, theses things can be turned on or off in the regular parameter programing

The VIN you seek is a CL713 1M2AD62C6YW009499. Its a 1999 plain old ETECH with the engine ECM programmed from the factory to 460XT. This program will not load on a 02 and newer CCRS engine ECM's. .

So true Dirtymilkman. The CH cab hasn't changed much except for cutting a hole in the firewall for a doghouse for the MP engine and scooting the back wall back a few inches , to make room for some of our larger drivers. I remember getting in our first CH's on the lot back in 89. All were silver with blue strips and had the fiberglass MH doors on them. E-6 4-valve head manual pump engines. Those a were the days. I don't remember doing much warranty work on them babies!

Probably needs as cluster. But try this first. sb732005.pdf