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Do you have a replacement? Try a solenoid first wouldn’t go pulling the econovance parts are near impossible to get! I believe I would disarm the econovance and set the timing to 20 or so and call it a day! Just my thoughts on it!is this a customers truck? If so the afore mentioned fix may not be viable! With out permission! 

1 hour ago, BigRigRepair said:

1996 Mack e7-350 between 1400 and 1800 rpm’s is smokes and misses really bad. I’m thinking something might be wrong with the econovance. Truck came in with fuel in the oil. Got that fixed and replaced several fuel lines. Any help would be appreciated. I’m not very familiar with Mack engines. 

Do you have a check engine light on? You can try put 12v to the econovance ! this will prove out whether it is mechanical or wiring/ software issue! if the stumble goes away you have a wiring issue! If it does not you have a physical issue with the econovance! broken spring or sealing issue! ect  !  Also check the line from the block to the econovance if the line has pluged it won't work either!  on older models There are also screens that can plug up in the econovance block remove the plugs and check these if you take the block off be sure to try and save the gasket or  get the right gasket for the year there are two different gaskets!

20 hours ago, 2015Mack said:

I have a 2015 Mack with an Mdrive transmission.  When adding a PTO and using the PTO switch in the dash, are there things that need to be enabled in the program?  We installed the mechanical part but the switch won't engage the pto.  

Yup ! Think its a dealer issue here there are lots of parameters to be set even just enabling it (may not) get the result you expect!

On 1/10/2024 at 6:15 AM, mechohaulic said:

a slide clutch in backwards.  it's time to walk away /take a break and have cup of coffee or ==. been there dun that . the frustration of what's wrong will cause "confusion" on the thought process ; walk away and come back SOMETIMES helps . in going through the gears are we talking of top covers off and manually moving sliders or shifting with covers on?

Good point and easy to do!

On 1/10/2024 at 11:11 AM, Wasteman1 said:

we took it to Mack they replaced the EGR cooler and EGR diff sensor and Venturi tube with new. they said it needed injectors. we replaced the injector and still the same problem. we have now replaced the ACM but Mack programmed the new one with the old ones program. it still id not dosing unless your in test mode, then it doses fine. 4094 will not go away, it is still not dosing. we are trying to get a used ACM from a good working truck. 

Did they sweep check the turbo? if the turbo is sticking it is a viscous circle as far as soot production ! not enough air more soot! round and round! 

12 hours ago, JoeH said:

Considering the same year block can put out 25psi boost on the 283hp version I can't think of anything that'll get hurt at 20psi.  That head you had rebuilt would make me nervous, it took a beating.  Wouldn't be surprised if a valve seat worked itself loose... 

The fuel pump is what limits the truck on power. The turbo will only put out enough air to match the fuel pump needs. I think. Basically the fuel exhaust drives turbo, so when you run out of fuel potential you run out of turbo potential.

The older two valve V8 would make a popping sound when a valve seat came loose and could really be heard when shutting down the engine pop pop pop as it was being shut down! the seat was big enough it would not fall out un like the 4 valve V8 ! That said the six rarely had seat issues 2 or 4 valve! Just sayin!

1 hour ago, Goddy454 said:

I ran a crystal sublimation and this seems to have corrected the issue with the rising number during a regen, it also set the soot back down to zero when it finished, but the truck is now calling for a regen everyday, i will have to a snap test and check into things further. Thanks

Think you should check the egr  differential pressure sensor and venturie tube ports foe clogging ! just sayin!

You get this working again bro!

13 hours ago, Highroadhauling said:

T2180B, water in trans, blown out oil cooler, can I bypass the oil cooler. Also guessing synchro is bad, grinding from high to low, is this a just replace the synchro and see or pull whole transmission and look inside type of job. Any help is appreciated, TIA.

Yup to both ! By pass the cooler and change the oil and try it but it has likly roasted the syncro! BUT you may get lucky!  The job can be done in the truck however you have to have special tools to do it! And it aint cheap! PAI parts for this are quite reasonable compared to Mack pricing!

2 minutes ago, Johnny93 said:

What signs will I get when pulling pan and valve covers and pressurizing the coolant system if it is the oil cooler? What should I look for?

you will see  where the coolant is oozing from with the pan off! Also there are plugs in the head between the rockers that can leak check there first but usually its a liner or oil cooler if this showed up quickly  both will show up with the pan off!

5 minutes ago, Johnny93 said:

I have a 2000 model CH613 with a E7 460 that is using 2-3 gallons of coolant a day. It doesn’t leak a drop and isn’t making oil. Looks like it is blowing straight steam out of the blow-by tube. Oil isn’t milky but if you pull the oil fill plug it has a greenish sludge and the valve cover has a green film. I’m thinking leaky liner but are there any other possibilities? Bad air compressor (tanks are dry) bad oil cooler? Bad head gasket (does not pressurize the coolant system or run hot) anything else to check?

Oil cooler possible! pull the oil pan and pressurize the system it will tell you where your At!

12 hours ago, Supermutt said:

Checking to see if anyone here has a manual on the Ambac E9 V8 injection pump ?

 
Type APE  8VBB110Q6418B1 (313CC4362P1) 

The E9 engine service/rebuild book does not get into any detail on the pump. 
 

Thank you. 

Bro I think you need to go to a bosch pump shop for this ! Did you get the engine to run or still no fuel? ! If you still fighing it remove the transfer pump and get a mirror look inside the hole where it mounts and check the little gear that runs the TF pump it may have fallen off its shaft!

8 hours ago, mrsmackpaul said:

Sounds like you have a air leak in the supply side but when the motor isn't running it is getting siphoned back up the return to tank side

This allows it to run for a few moments before it dies from no fuel

 

Paul

Agree check  the tank vent or fuel cap! 

On 11/4/2023 at 7:19 AM, Outlawfleet said:

Problem:  my crd151 is howling and has a ton of metal in the top housing. It’s also causing a BAD vibration. 
$6,000 for a reman. I can not seem to find a good used take out in a 3.79 ratio. 
 

im being told CRD92/93 will fit my housing, but they do not come in the same ratio as the 150s so I would have to change both diffs. 
92/93 seem to be much cheaper and more available. 
 

Would y’all recommend ditching the 151/150 in favor of the 92/93? 
 

Thoughts and opinions?

 

Thanks. 

My opinion of the 151 is the only good thing about it is the diff lock! KT and I disagree on its reliability ! It has some design flaws from my view point !  92 /93 has the test of time going for it! How ever I think you closest ratio will be around 3.87

21 minutes ago, D is for diesel said:

The tool was for the rings cut in the head. The description he had was something that reminded me of a tool almost like a counterbore cutter for Detroit 60 series. 

We had this tool at our shop! it had two templets one for the v 8 one for the e six 2 valve and one for the 4 valve e six! I only did this job once or twice we gave the tool to the shop that did all our head work as they did all our valve seat repairs back when the v8 had seat issues and head plaining was a deal! think it is an kent moore  tool! the tool here is for Eteck  How ever very similar  Cylinder Head Inspection; Fire Ring Groove Cutting - Mack E-TECH SB-210-034 Service Manual [Page 201] | ManualsLib         fire ring groove cutter J 29600-C

20 hours ago, Grind said:

Looks like it's connected to a master cylinder. Cousin says the front brakes (that are no longer attached) were air over hydraulic so it probably powers those?

No long threaded rod visible but maybe it's inside the master cylinder? One hydraulic break line comes out of the MC, goes up the chassis towards cab. Out the top of the MC is what looks like a 3/8" air line, disappears into the cab firewall, haven't tracked it down further. Photos attached.

Red air valve, see attached photo.

Thanks for your time and knowledge,  much appreciated.

All makes sense now! Ford used to use this setup on the Louisville back in the day  on front Disk app! never seen it on a Mack!

50 minutes ago, terry said:

Leak in return line will let it bleed off.  does that supply pump have the two little plastic check valves? if one is bad no pumping fuel.     terry

Terry is correct Any return line leaks can cause this ! There is a return line over flow valve RH rear of the fuel pump that can cause issues as well! Check all the jumper lins an connections and the little orings on the  metal returns at the rear of the pump!

13 minutes ago, 67RModel said:

I personally think Mack should have poured their resources into developing the Mack "Big Six" prototype that is at the Mack Museum. It would have been directly competing with 855 Cummins and 1693/3406A Caterpillars at the time. Given Mack's engineering prowess at that time, they would have had an incredible big bore, inline, "highway engine". While cool, the E9 should have never been. Mack should have let the V8 die after the 855/856 V8s. Its easy to say this in hindsight but I think the E9 ultimately handicapped Mack...

I suppose your right to some degree! I am not a good one to talk to on this subject The Volvo people took a very proud group of people and disbanded them and replaced them with Volvo puppets! Very little left in the way of Real Mack know how these days !   That said !  Scania has made great strides  with the v Power!  Face it there is nothing simple these days ! Everything involves a computer or some overwhelming Teck of some sort.  So be it A straight Six Or V8 Its Going to be a dogs breakfast of Teck! Glad to be away from it Mostly! 😂

On 12/13/2023 at 7:06 AM, 67RModel said:

The E9 was probably a big deal back in the day but honestly is not all that impressive by today's standards even when compared to a "puny", modern 12 liter engine. The E9-500 didn't even make 1700 ft*lb of torque. Torque is a very arched curve peaking at 1650 at 1400 rpm. An MP8 has constant 1860 ft*lb from 1100 - 1400 rpm. and The MP8's 505 hp is almost constant from 1400 to 1900 rpm. The E9-500 is only making 440 hp at 1400rpm and gradually climbs to a peak of 500 at 1900rpm. All else being equal an MP8 would easily out pull a stock E9-500. and a 605 X15 Cummins would blow the doors off the truck with the E9. My guess is keeping the MP8 running and out of the dealership service department would be problematic though. 

If the Volvo turds had continued advancing the V8 They may have Easily surpassed 2000 ft lbs by now ! Use the Scania as an example! The original V8 and Scania were Closely linked at one point! And The Engines would sound better! 😄 Apart from a locomotive!  Nothing beats the sound of The V8 !

1 hour ago, Joey Mack said:

Now I have a complex...  Thanks TJC..  here's one for ya,   I have no clue what that part is...  So there.....  😘

Yup Im at a total loss as to that! It has what looks to be another valve where the rod should be on a roto chamber pot!🙃