Mackpro

Bad wiring/rubbing ground or open , which sounds easy till you try to find it on a MRU or a LEU. They do have new updated part # on the atomization module Atomization Moduel.pdf

Here is a low power checklist from Mack. Its for the ETECH 1998 through 2001. It might also be helpful on the 2002-2003 CCRS engines as well ETECH low power checklist.pdf

In this home-made chart. A 355/380 has alot more torque than a 400. Any thing bigger that a 400 needs turbo and injectors and cam key way changed. This is 1999-2001 ETECH,'s only and not the 2002 and up CCRS engines scan0378.pdf

Here are the spec sheets on the 310/330, 330/350 and the 355/380. If you have a Mack trans your good regardless of HP. Some of the Eaton Fullers with the lower torque rating might be an issue but i doubt it. scan0379.pdf scan0380.pdf scan0381.pdf

I think there were 3 different centramax systems. The first one screwed up from the bottom and had the rubber elbow hose off the bottom that drained back in to the block. Later on They came out with two different ones , they both mounted from the top, one version was I think discontinued and it was for MR's and LE's and had a white spinner filter. I only saw a few of thoses, I think they came out with conversion kit to change it over to the black spinner filter that were more common. Clear as mud right?

I found this while searching for something else and thought it might come in handy. Some of the things in it can only be checked by the dealer software or some types aftermarket data readers ( J-PRO). This is only for the ASET AI and AC engines. ASET low power checklist.pdf

Here's a bulletin on low power. This is only for the ASET, AI and AC engine. ASET low power checklist.pdf

going from what you got now to 355/380 requires no parts but download only

Remove after cooler and clean front of radiator fins. We see lots of clogged radiators between aftercooler and radiator. Farm trucks are the worst about this

I take that back, I believe this it it.

I have seen very very few factory boost pressure guages in RD's. They were very simple mechanical guages with a simple 1/8" to 1/4" plastic air line coming from the intake manifold. They did match the other guages though. I did a google search in images and could not find a picture.

Remove it and see if i the end of the valve unscrewing its self and causing it to dump boost

Location of boost relief valve

You should have around 33 psi boost , check air filter, check muffler for broken baffle. pressure test entire intake system , not just the after cooler. Also a big over looked part is the boost pressure relief valve on top of the intake manifold. Ill attach pictures of what it looks like soon .

Yous has the newest "Step 12B" program in it . It was done in September of 2016. There are a few different engine files that Mack software guy ( not the dealer) wont talk about that if the dealer begs enough they can get turned on and downloaded. These seem only for the AI 427 HP engine. And it will help.

Have you had any of the software updates done for poor throttle responce done at a dealer. If your unsure, I can pull it up and usually see. You got the last 6 of your Vin?

Also on most CV trucks with AI/AMI engines . The exhaust starts out as 5" coming off the turbo then with in a few inches the turbo outlet pipe necks down to 4" all the way to the muffler. Then the muffler is a 4" in and 5" outlet. On the very early CV with standard ETECH engines, the turbo outlet pipe stays 5" all the way till the last few inches of the pipe then necks down. Ive seen a few guys here use the older outlet pipe and cut off the necked down part and make there own 5" exhaust and get a Walker high flow 5" in/5" out muffler. If I was gonna go the AC cam swap, I'd do the full 5" exhaust too.

The AI/AMI engine has a small internal diameter exhaust manifold to create back pressure in the cylinders. The camshaft has two bumps on the exhaust lobe so that the exhaust valves open twice for every one time the intake valves open. This allows burnt exhaust gasses to be sucked back down and burned again thanks to the exhaust back pressure created by the small exhaust manifolds. Its kinda like an internal EGR. Some guys on here have replaced the AI/AMI camshaft with a AC engine camshaft and had good results. I have run into a 427 HP AI engine on a CV rolloff truck that had large ETECH exhaust manifold installed on it. Every thing else was factory including turbo, it sure didnt feel any stronger.

Look at the top of page 6 of this Bulletin. Some camshafts that came in some AI engine cant be used with the Jacobs brake/J-tech brake sb213035 E-tech camshaft.pdf

Back in December I was in the Mack MP common rail engine class and there was no mention of the MP10 getting the common rail upgrade. And for that matter not much was said about the MP7 either

You might be onto something, I have a chart at work with all the camshaft part numbers for the ASET engines. I know the powerleash has its own camshaft . However I don't know if it is compatible with the Jacobs brake

Can only be checked if the yellow/amber "lighting bolt" is on. Turn the cruise on/off to off ( down). Then press and hold the set/decel or resume/accel button till the fault lamp goes out , then release and the fault lamp will flash out a 2 digit code.

Check the "U" shaped fuel return jumper pipe between the heads/valve covers. Make sure its not wet around this jumper. There is a check valve on the injection pump where the return fuel flows out. There are about 3 different styles, a couple of styles have a spring and check ball that can be shimmed for more fuel pressure. And on the later VMAC pump it was a simple solid fitting with a small hole drilled in it to make a restriction to create back pressure. The transfer pumps would sometimes leak but usually leak fuel into the oil pan.

We always use the pink/red pre-mixed 50/50 stuff here. I talked to our guy here and he does the same thing as you did. back the bolts out till they hit the balancer and slide the gasket/square o-ring out. However he had some that he could do like that for some reason but cant remember which engine it was on.

Here is the recall. SC0342 CX-CXNheadlight switch recall.pdf