Kwdriver84

Hey guys, I got a 07 Mack aset 427. My truck started engaging the fan on and off and it won’t want to go over 40mph. I can start it and run it then after a while it starts acting up. I have change both temperature sensors and no solution. Any advise would be appreciated.

@Joey Mack well I took it to a mechanic today took the oil pan off and saw leaking on number 5,6 and 2 liner seals according to him. He said once he open it up he can see if I’m going to need sleeves and liners. I might as well just buy an in frame kit right?

@Joey Mack I live in Wallace NC I believe your over 3 hrs away from me.

@Joey Mack I appreciate your help/info very helpful. Thanks. 🤙

@Joey Mack yeah the liners might be what’s causing me to loose coolant. I’m going to go ahead and do that tomorrow to see for sure. Just in case that is the issue what’s the average repair cost?

I’ll go ahead and try that @Joey Mack would the egr cooler cause that also? @mrgumby?

Hey guys, have a 05 Mack ch600 asset 427 engine. I recently notice gunk coming out the crankcase pipe so I went ahead and open the filter and found all this gunk. I also had the water pump replace a few days ago because it was leaking and I was using up antifreeze before that. Here’s some pics of what I found. Any idea what’s causing this gunk? Thanks

Good afternoon, I have a 97 CH613 E7 vmac2. It started to rev high without me touching the pedal. I had to cut the truck off and start it again for it to get back to normal. It did it a few times this morning randomly while idling. could this be an issue with the pedal or sensor? any suggestions or advice would be appreciated.

Good afternoon fellas. I have a 97 mack 613 V-Mac 2. I was going down the road and truck suddenly shut down and won’t crack anymore. Had to call the tow man to the house. The codes I get is 7-5 and 5-7 is there anyone out here that can help me out. Thanks

what would a 89 superliner rw600 all mack transmission,rears and engine have in the hood? I bought this truck from someone and i feel like they took the gold dog and put a crome one on it. Ive seen some for sale with a number 1,387,477 on it and some with 87931.what are the difference in these?😕thanks

Do you get lighting bolt when it shuts off on the dash? I use to have a shut off problem myself. I had to replace the fuel injection pump and it would still shut down but this time it would crank right up as before it would shut off and would take some minutes to crank right up. One day I was parked and decicded to wiggle the cables leading to the ecu on the passenger side under the dash there’s an opening. As soon as I did that it shut off and lighting bolt would come on. I decicded to open the cover and unplugged the ecu cleaned the connectors and plugged it back in. I also tight down the wires with some tight straps so they won’t move too much. It might of been the cleaning of the connection or me holding those cables in a better place but it never did shut off again. Hope this helps.

many thanks guys. I purchase my copy at a local mack dealer for $80. The price was worth it because the illustrations were real clear and was able to fix my camshaft.

Im changing my 89 mack superliner camshaft and wondering where I can find the manual for this engine? I found a e7 maual online but Im guessing they are somewhat different. thanks

I've had this issue for a while now. My 97 mack ch613 vmac 2 keeps shutting off radomly at idle and running and shows code 7-5.I changed the fuel injection pump hoping that would fix the issue. About two weeks it ran fine no issues now it started doing it again. Any suggestions are welcome. Thanks

@turckster well $3,300 later with a re manufactured injection pump. I drove home this afternoon with it and didn't have any issues. Went to get a load to the woods and it started to shut on me again giving the same code 7-5 and at one time it gave me 5-9. I managed to drive it out to the highway for a 80 mile load and 45 mile trip back home and no issues whatsoever. I'm thinking about driving it tomorrow to see what it does again. What you think @turckster?

Well Mack place priced it at $2,600 taxes included and the rebuild shop said anywhere from $1,800-$2,200 to rebuild it. I went with the Mack place since it's going to be alittle faster to replace. It should be ready this week and hopefully that is going to take care of the whole 7-5 issue I had. I'll keep you updated.

@turckster it's been a while since I posted an update. Well the truck didn't give me much problem during the winter season but somehow now that we got hotter temps and it's summer the truck has been shutting off on me more often. Finally Tuesday it left me stranded on the highway it didn't want to crank anymore and the same code came up 7-5. I had enough and took it to the mack place and now I'm being told I might need a new injection pump. Do you think if there's soldering issue inside the pump like you suggested does it need to be rebuild or is there a cheaper fix?

I think I have the same issue. I'm driving the the road and it shuts off and gives me the 7-5 code every time. It's sitting at the mack place right now and they are trying to figure out what's the issue. I have notice during the winter season it wouldn't do it but the hotter it gets the more it starts acting up. They adjusted the fuel pump yesterday because they said it was out of adjustment but that didn't fix the issue. What you guys think??

@turckster I have unplugged it and cleaned it out and plug it back in and the problem goes away for 2-3 days and it starts again. If the plug is the issue can I just buy the plug and rewired the new one to it? Thanks

The harness connector is it a round cylinder plug? @turckster

@hatcity yeah I did find the mac3 codes and it did say it was battery/alternator I was just making sure it was the same code for the mac2.

@turckster I'm sorry for bother but I'm having an issue. My truck has been shutting off randomly and also going down the road. The lighting bolt comes on and gives me a 7-5 code then I able to crank right back up. Somet days it cuts off than others. I tried to find the codes for the v-mac 2 but no luck yet. Do you know what could be the issue? Thanks

@turckster I ordered the speed sensor and finally got the light to go out and got power back on my truck. I appreciate your help/advice and hope this post helps more people out there. Thanks again buddy.👍🏽👏🏽

@turckster I checked the engine plate it says e-7 330-350 and my I do have an inline injection pump. So the next question is "where is the speed sensor on this truck on the flywheel or back of transmission?" I also found this speed sensors online what's the difference? Thanks

I have a 97 mack ch-613 with a 350 engine. The electronic malfunction came on and I figured how to pull up the code which is 4-2 fan clutch output If I'm not mistaken.The light has a weird pattern from what I have seen sometimes its stays on for days and sometimes it cuts on and off through out the day. when its on I loose performance power and when it cuts off I get it back again. My fan works good and I don't see why I'm getting this code please help anybody!!!