jzack

Nice welding! You just saved yourself a ton of $$$ too. New mufflers and stacks ain't cheap. Just replaced mine a while back ($500 give or take) and I just have a one-stack Mack with a window in the back.

Sounds like you could have coolant in your ECU. I know of another 2001 Vision that had that problem with very similar symptoms as yours. I think the sensor on the overflow bottle goes bad allowing coolant to pass and follow the wire all the way into the ECU in the engine bay. Pretty sure there was a service bulletin on it. Expensive to fix but she'll run like new again.

My E-7 350hp has 820,000mi and 26,000hrs. Never been cracked open yet. Still has the original turbo even.....so yeah, I'd say pretty close to bullet-proof.

I'm almost 100% certain a 95 E-7 427 would be electronic. The early electronic motors (93-97's) had electronically-controlled Bosch pumps that looked very similar to mechanical pumps (easy to mistake the two). Look for a wire-harness attached to the pump. Another way to tell is ask if it has push-button cruise-control.

Thanks for all the great replies all. My guess is Swishy is right and the batteries were over full to begin with or they just have a bad vent design (they ARE from Batteries Plus). Not noticing nearly the leakage as before and they all have held a good charge for months now so I don't think it was a bad battery or electrical issue. Jeff

Say isn't your CL a factory 454hp? If so did Blixxton make a "special program" for your truck? Just asking because I was told the Blixxton only works for the Bosch pump used in the 300-400hp V-macs. Could explain why your not as impressed with the performance as I am....

Talked to an owner-operator who owned both and he said there was no comparison, E-9 hands down would outpull his E-7. Although fuel milaege was a different story. Just guessing but I think Mack "specs" their motors to stay within the limits of certain drive-train components like Fuller transmissions. Doesn't have much to do with what the motor is actually capable of.

the bandit

Sorry, not really trying to mislead anyone here. Just stating my 350hp mack now pulls as well, if not better than a 460hp mack after adding the Blixxton. Same conditions, same load, in the real world, not on a dyno. I'm not selling Blixxton's nor do I work for them. I'm just an owner-operator driving the same Mack for 15yrs and am very happy I didn't have to trade her in when I became dissatisfied my little 350. Jeff

Well I've run a Blixxton on my 94 E-7 350hp for about a year now with no problems and I just love it. I leave it on the 30% setting and still get 6.3 to 7.3 MPG. I can easily hang with our 99 460hp E-tech in the hills, even gaining a truck length or two! Not bad for an otherwise stock 350. Doing the math, 30% added to a 350 is about 455hp, so their claim is pretty darn close. Pyrometer has gone up 50 deg.F, nothing serious, I've only had to back out of it once because of exhaust temps. I can also say throttle response has improved greatly at low RPMs. 30+ psi at the manifold from 1200RPM on up really wakes up the E-7. I do get a puff of black smoke after each shift. Talked to Alex and he said the new program no longer waits for boost signal before applying fuel. Guess that explains the smoke, and better throttle response. Jeff

Maybe its 10 minutes....not really sure because I always bump my idle up too. I wouldn't think its adjustable because I heard its a safety issue to prevent colder than normal cylinder temps that could allow unburned fuel passby the rings and into the crankcase.....not positive though.

Probably overrides the auto shutdown. My CH has one anyway. After 5 min of idle time a buzzer sounds warning you the engine will shutdown unless the override button is pressed.

I never heard the duel exhaust thing, could you provide a link to that page? If we are looking at the same product I actually read that they decrease your back pressure. This is why they have been popular on school buses that have that extremely long, restrictive pipe that runs the length of the bus body.

I ordered a QPM (Quiet Performence Muffler) for my truck a while back but haven"t had a chance to install it yet. SUPPOSEDLY, they will relieve backpressure yet remain just as quiet as stock. They also claim to lower EGT's and get you better fuel mileage. In fact they guarranty better mileage or your money back. I have heard that your Jake is quite a bit louder with a QPM though. It looks like a big auger system stuffed into your stack. It is patented so there may be something to it..... The mfr. is Grand Rock, I ordered mine through Berube's. Jeff

Thanks Mackpro, we'll try the number and see, like you said it couldn't hurt.

A friend of mine has a 2001 Vision (100yr anniv. edition) that started to stall at random about a year ago. Well last week it got so bad he brought it in to the local dealer and what they discovered was really odd. One of his coolant temp sensors was actually pushing coolant up the wire! Eventually it made its way all the way to the ECU and caused all kinds of havoc. Mack said he needed a new ECU ($1800), a new wire harness, and all this would take 8 hrs labor. A hard pill to swallow in these economic times! Since this was a unique circumstance out of anyone's control, could my friend get anywhere by taking this straight to Mack Headquarters (maybe a 1-800#) and asking them to take care of at least part of his repair bill? Thanks, Jeff

My coupler was only a few inches behind the pump (towards the cab). You may not have the Bosch inline pump. Is it a V-macI or II?