Mackpro

80 psi of fuel pressure at idle is good but they need to check it going down the road. You can get an higher pressure fuel valve to boost it up to 100 psi. Mack part # 63AM28

fjh is correct , they should be testing the whole intake system. Around that year they had some bad intake manifold gaskets that blew out around #1 cylinder. The new gaskets a steel core in them now. Also the air compressor intake pipe that runs around the back of the engine to the intake manifold has been problems.

The AI engines in the CV,LE and MR's have whats called internal EGR where the camshaft has 2 bumps on the exhaust lobe , this makes the exhaust valves open twice for every time the intake valve opens, this suckes in burnt exhaust gasses from the restricted exhaust manifold and reburns it. The EPA let them get away with this because the CV,LE amd MR's are not "over the road trucks"

As far as aftermarket there is nothing out there yet. However all MP-8 engines are the same regardless of HP. From 415 to 485 HP there exactly the same engine, just the software down load is the difference. If you dont have the 485 a Mack dealer can submitt a HP change request form and tell you how much it would cost.

They did come out with some new improved injector rocker arms and this seem to have stopped the breakage problem. When I asked about changing out the older style arms on older trucks I was told that if they were gonna break, they would have done so by now. They have also fixed the injector cup problem by coming up with a better sealing injector washer and a software download.

We ordered 2 Titans several months ago but nobody at Mack could tell what they would cost. Well finally on Monday we got pricing info. I was shocked at how cheap our dealer price was. I'm not in sales so I dont know how much we will mark them up but I was figuring our cost would be around $150,000. Our actual cost was way cheaper than that. There was also a small option check list too, mostly trans and rear axle options.

If the truck dosent have a coolant conditioner filter, 600k is about right, We see alot of ETECHs with pitted liners and counterbores leaking coolant into oilpan and 90% of them dont have coolant conditioner filters.

Our MP engine turbos come in Cummins boxes and sometimes we get engine parts in Volvo boxes, if they are out of the Mack part # they send the same part in a Volvo box, same engine, same part.

That is very true. We have all these shelves with nothing but plain brown cardboard boxes on them. If these were sitting on the shelf, they would stick out like a sore thumb. I did find another box of rings and a few dead mice under the shelf. Also found 2 Switzer turbo center sections, both in great shape, one still in the box and these are very old as well.

While I was looking on the end of some shelves for a fuel line, I felt down between the wall and the shelf and pulled this out. We got the part back on 1/22/68. I was born 3 months later. I,m going back under the shelves to look some more.

I looked at my 1996 Mack tune up book and the spec for HOT idle is 10-30 psi and at HOT wide open is 34-64psi.

Fuse 18 does the back up lights on ch/cl up to 1998 or non Etech engines. On 1999 and up Etech engined models its fuse 42 out under the hood.

Dont buy it unless its for local hauling or farm use. The 2004 CX and CH trucks had more warranty claims than any other trucks that Mack ever made. Later the CXN and CHN came out with the same engine but had most of the bugs worked out. We still have problems with EGR coolers(made in Mexico), VGT position sensors, EUP's and exhaust manifold gaskets. This is not to be confused with the 2004 CV's and vocational trucks which used a totally different version of the ETECH engine, thoses engines are great.

Raise the hood, below the windshields, look at the "cowl" "the black plastic piece that goes across the cab" On the bottom of the cowl, above the valvecovers there should be 2 rubber snounts that hang down( about 2 inches long). These snouts are water drains for the cowl. These snouts get plugged up with dirt and flies and trash, the water cant drain out of the cowl and then the cowl fills up and water drips into the cab and lands right onto the parking brake sending unit (above the throttle pedal) We see this all the time, remove the snouts and clean them out and replace the sensor and your fixed.

U broke down.............sorry I couldn't help my self

Notice different horsepower ratings and no DPF exhaust filters.

Has any of the Titan's rolled off the assembly line yet? I know while doing warranty paper work, they do have serial #'s assigned to the Titans. It looks like whoever buys TD713 vin 001004 will get the first one built.

My friend up at Mack in Allentown told me today that Cat finally did come out and say they would not make any "truck engines" for the 2010 emissions. I dont blame them at all. The guy that lives across the street from me is a Cat equipment salesman and I saw him at his mailbox and asked him If its true and he said yes.

I had a humidity sensor going bad one time , making a hard starting problem, we thought it was loosing prime and we replaced everything and still had problem. The only way we found it was watching active code screen on laptop while cranking engine and code would pop up for 2 seconds then off then back on. By-pass the Davco then try it, also if fuel supply pump has plastic small screen/filter hanging off the bottom, change it also.

Last week we did a injector cup job on an MP8 and the driver said they also had some new volvo's with the "same as MP8" engines and they were also having the problems as the Macks "as far as injector cups go". We have been lucky here as our MP-8 have mostly just had injector cup failures. But I just pulled in an MP8 and it had a bad miss and a code for #3 injector, when I removed the valve cover, the exhaust roller had locked up and gouged the cam. So it's cam time. By the way, the rocker arms have "VOLVO" casted into them, so they do use the same parts. Another funny thing, we had an MP7 turbo lock up today, we had one in stock and it came in a Cummins box, Holset make the MP turbo but is owned but Cummins. Customer saw this and thought we were putting Cummins parts on his Mack, we told him it would go faster and he was happy.

By fuel processor I guess you mean the fuel filter assembley that has the clear plastic bowl with the fuel filter in it? If so, it does have 2 heater (coolant) hoses that pump coolant through it to keep the fuel warm in the winter. If you just bypassed this by looping the hose back around to the engine, it should not have hurt any thing and the truck should run fine. I have seen some that used regular heater(rubber) hoses and some that used high pressure style(stratoflex) hoses to run coolant through the filter. If your's uses the high pressure style hoses you might have gotten the lines mixed up as the fuel lines look like the coolant lines. P.S. you need to put shutoffs one those coolant lines so in the summer, you dont heat the fuel so hot, we have had some low power complaints do to fuel heaters left on during the summer.

The dip switches on the back of the tach could be set wrong and then the tach would be off. Take to a mack dealer and let them plug a ProLink to it a see what the rpms are on the ProLink. If rpms are really 2300 the somethings wrong with the injection pump.

There is no set average of hours vs miles, I'm just going by what we see around here. As far as overhaul, Mack says if it burns more than a gallon oil per 1000 miles it needs an overhaul, this is what they said in a service bullitin back in 2000. They were not concerned about blow-by at all, just oil consumption.

Yes, hours X MPH, But on dump truck around here 35mph is usually the max and I just checked an asphalt hauler and it was 13mph average. I just checked a CXU over the road truck and it was ave. 54 mph and it dosent idle at night due to having a APU generator insalled.

A somewhat large trucking company in our area just parked all their trucks about a month ago. They didnt go out of bussiness just parked them till either fuel comes down or freight rates come up. They have over 100 trucks, at one time they had about 16 Macks in their fleet(2000 CX's) but go rid of them and bought more freightliners.