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I know which valve you're talking about, but I can't find the part number for the 100 psi version. All the ones I can find are the 54 +/-7 PSI or lower. I'll see if I find anything, but hopefully someone else can chime in as well.

Agkits.com,, raineys truck parts.com,,, individuals cant Buy directly from PAI. The Mack dealer in my town started selling PAI just over a year ago.

I started an account on PAI website which is great for the parts catalogs, but I assumed I'd be able to order parts online too, but I don't see any function for it. Where/how do you guys buy PAI Mack parts?

If you have checked for a vacuum leak (unmetered air entering after the carb). take a good look at the distributor. Any play in the shaft can cause the dwell to go haywire when the advance starts to pull in. I'd 1st check the carb and intake for reason why it seams to be lean. But if you find nothing wrong look at the ign side of things. I had a 392 in a school bus that was in a shop for a valve job. Wouldn't run for crap and the shop wanted to put a new carb on, I wouldn't authorize it as I knew the carb was fine. They put one on to "show me" and it didn't run any better, had egg on their face and had to re-install the old carb and eat the price of the new one. Put a dwell meter on the ign and strapped to the windshield, and as soon as the advance started the dwell dropped to nothing. Long and short was the shaft bushing were shot and it needed a distributor. Also make sure the mechanical advance is free and the weights can move the shaft. Use a mighty vac to test the vacuum advance. It would act like fuel, stubble and back-fire with an occasional after-fire. I had to farm out the valve job because the place I was working, caring for their fleet, the bus took up the whole shop and was very difficult to get it in under its own power, would have been impossible to get it out and back in while the heads were being worked on. There is an old saying that 90% of carb problems are ign problems.

Same here. I drive a 2018 exploder, but it is still under warranty for another 40k miles or 4 years. The two other cars and 2 of the trucks are over 45 years old, and the other two are diesels.

Hello Does anyone remember the part number for E7 ETech 100 psi fuel return valve?Goes on side of block near 4-5 injector. I am in need of a new higher pressure valve.

https://www.ebay.com/itm/384440040267 buy this and you'll be ahead

Probably the sensors on the diff lock mechanisms.

And here I am at 36 and hate working on or attempting to work on vehicles that don't have a Carb or throttle body injection. 🤔 that's why I own a 1976 Chevrolet Cheyenne C20 I can work on it myself

I use carb cleaner or brake cleaner to check for vacuum leaks. Spray round carb base, carb gaskets, and intake and listen for change in idle. Also can't hurt to spray vacuum hoses either

I took the carburetor off and cleaned it as best I could, it will run but only with the choke mostly closed, the next thing I'm going to check is the vacuum in the distributor. It acts like it has a vacuum leak but I couldn't find any, and that's the only thing I haven't checked yet.

You got that right! Reminds me of the time I took a Dodge pickup I had to a little garage in Concord for something. The man said "I can't work on that, it's got a carburetor and I don't work on anything that old". It was a '91 model I think, which to me is not "that old". And it didn't have a carburetor, it had the throttle body injection. What he was REALLY saying was " if I can't just plug a computer into it and let it tell me what the issue is I can't work on it".

Gotcha, that's quite a ways from me! Glad you were able to find what you're looking for. Hope you stick around so we can see the end results too!

Hi All , would anyone have one or two of the very small bulldog mascots for sale? Paul

Yep.. i think Australians call all of us Yankees..

Load number two Sitting in a paddock waiting It really is 17 feet wide and at least 60 feet long It isn't as big or even close to as big as the trailer attached to the big Mack Two normal bogie axle assemblies underneath, side by side Farmer reckons he has a loader than might sort of lift one end The rest is blocks of wood and jacks and winching I'll be living the dream, I really will As a apprentice there was a sign in the work shop that read something like this "We the unwilling have been doing the unbelievable with so little for so long we now attempt to do the impossible with nothing Kinda how I do everything, get into it and have a crack, I can only make a mess or succeed Paul

Well it's on like Donkey Kong now It's begun Mecho So we don't have flash rotator jiggers but rather we have what have at hand So we grab Mals Traxcavator, Case 1150 Lifts heaps First said gudday to Opera , aka "the black bitch" Mal bunged the tipper back on her in recent times Chucked the Traxcavator on and run it up to the unload site Then drop it off And head for home Phase one complete This trailer is bigger than Ben Hur I am gunna shift Or at least try and shift, it will be the second biggest size thing I have ever shifted Widest was 24 feet x 50 or 55 feet Will see what happens, might end up a complete cluster Paul

I went out to warm the truck up (1979 DM685sx T/A Dump Truck) and noticed the tach and speedometer are not working...again. They started working for a few days and now they are not working again. No movement on either one. Suggestions on where to start my testing? I have two manuals but neither one covers gauges. If anyone can also point out where I could get a manual for the electronics end of it I would appreciate it. Thanks.

It took me a while but I got the new clutch in. I put in the Eaton 9 spring ''Easy Pedal'' clutch. Yes, I went ahead and paid a local guy to put it in. He was backed up so it took a while but I now have a new clutch. Thanks for all the suggestions. Now I need to get some other things working. It is fully usable at this point but there a lot of little things that need attention. I will make new posts for those questions. Again, thanks everyone.

This from the guy born and raised in "Down East" Maine! Who now lives in NC. LOL! .....Hippy