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Possibly at the injector tubes! Yuo may have to pull the injectors to pressure test!

The torque limit wires would have to short together to cause this problem unpluged the unit becomes in effective.

There is a wire that goes to the torque limit swithch on an 18 speed trans it may be shorted it will cause the engine to have half the boost of normal. it is usually routed down and around the same area as the speed sensor pu wire.U claim to have a 12 sp and not used but even so the wire will still be there check for it.

OK That works !I have one more reqest if possible can you put a forum change box with a drop down at the bottom of the pages haveing to go back to the top to switch forums has always been a pain!

Barry my only real bitch is that the sign in takes you to an new account screen I already have an account Could you put a seperate log in button for us guys that already have accounts? I also liked to be able to choose my own skin! Stanless is OK but in explorer the white on gray is hard to read! In firefox its fine!

45- 55 fp torque down chris cross in smaller increments can't hurt to set the valves on an engine that old ! 16 intake 24 exhast! 55 pounds on the injector screw Snug the screw then loosen a bit, then tighten the injection line and then retorque the screw and properly tighten the injection line.This helps aline or seat the line to the injector to prevent leaks. Good luck

There is a small cover center bottom of the fly housing 6 bolt or 2 bolt cover depending on year remove it turn the engine in running rotation and alin the V/S Marks to the center of the peep hole and set the valves in firing order 153624. v/s 1&6 - V/s 5&2 - V/s3-4 Valves rocking on 6 set 1 valves rocking on 2 set 5 and so on!

The valve is there to retain a small amount of fuel preasure in the pump for start up! and to maintain a minimum 15 to 30 psi while running!if you have any air leaks from the heads down to the fuel pump you can end up with starting issues.

That Bolt thing would be the icing on the cake alright, That just blows me away to think the place is still in business! Begs to question how could all that happen to just one guy?? Or Did it happen to just one Guy??? Too many of these and you would think he will have no busisness!.He made absolutly no proffit on oil or wages not to mention all the business he looses by word of mouth Bad news all round. Hope you get it all cleaned up bud!

Well lucky you ya got it done twice .Rinsed all that crud out of the pan! What bummer day!

My first thought and relitivly cheap and easy thing to try is repining the vmac plug at the pumpmost mack dealers have the tools for this! Next Check the plug at the fire wall under the wash bottle remove it and check for any green conections and any rubbed wiring! Then I would say ya need to remove the pump and have the govener end looked at by a qualified pump shop! (semi common problem is the rack sensors inside the pump need replacing)! Do the pin thing first to varifi the pin thing un plug and replug the vmac plug a half dosen times then try running the truck for a bit and see if the problem has gone! If it has then it is likly the pins causing you greif! Also when you have the plug apart look at it and see if any of the male ends look brown and heated looking (a good sign of a poor conection)! Just some stuff to try!

I've seen em go as high as 220 no problem ,not saying thats right but have seen it ! Having said that I would venture to guess the rad has not been looked at for quite some time and the fan clutch on these did fail from time to time! So if it becomes a regular occurance I'd be leaning towards the clutch fan or stat's as it has come on rather fast! Unless the shut down comes on I'd not worry to much it may be as simple as a poor gauge or sender.

Thanx for posting your fix!Glad ya found the problem!

On mechanical engines thats the way it is! Normal!

Another possible place is Injectors as I beleive that year of engine still has a spill off lin in the head ,the fuel transfer pump seal is also a possible place Eups is the top of the three suspects.

I would check out the turbo seeif it didn't creater on the way home!

Did you replace all the orings ect on the return line tubes ?

Bro For Me as being an employee of a mack dealer We go out of our way to be compeditive on those type jobber parts you speak of And Im here to tell ya (some) of that stuff sold is shit. We got into that jazz for awhile selling no name reman and other (new) parts And Me And the rest of the Guys in the service were all over the parts guys to change back to buying parts thru the Parent company!Theres at least you will get a warrenty with the stuff you buy and the quality tends to be some what better. The jobber stuff on the other hand tends to fail more often and you get to keep both halves when it breaks. So the next time you see somthing so cheap sumwhere you can resist remember the old saying Theres likly a good reason. Not always but some times. Also remember part of the reason the captive parts aer so high is the fact that the consumables are being exploited by the jobber types and the dealer has to keep the doors open some how! The profit on those consuables is narrow in part due to this exploitation.So theres no place spread the pain. Just an opinion

Nope your the pig! You will lkly have to by a Head for the compressor the whole thing is over a grand up here! the Head is 400 500.The compressors rarly fail the heads fail a fare bit!

Yup put the rush on that if its still under warrenty!

We use to open up All the thresholds related to rpm in the customer programing to max that is the best you can do it is pretty much imposible to get max horse power where your wanting it and have any torque to go with it !

The Maxidyne engine is 3 times that little Cat engine depending on its treatment the engine will be the least of your worries! Dm is a very tough truck again depending on how its been treated will do what ever it is asked to do! If the price is right do for it!

SOOO ! Did 68 get this Data file in and did it Fix your issue???? Thanx

The LDA will repair the smoke problem to some degree but maybe not the power. Glad ya found the problem Maybe?