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nope I vaguly remeber this happening at work the bulbs will interchange maybe not perfectly but do interchange. the parts guy hands you a light you asume is right pop it in and this is the result! Moral of the story don't trust your parts guy!

Thanx for posting your fix Thats a real od ball to say the least!

Thats a good plan get as much warrenty as you can.In WRITING, Phone him first thou get the goods on that deal, Remember that this is speculation on my part!Just trying to help out if where I can. >..and 1 206m858bm tube Likly the mass flow tube.

IF they fixed it! I got traded in correct???get in contact with the guy if you can! My opinion!

sorry man This is what I think! They were looking for coolant push from my observation, did they find it is the question? they were grasping at straws. so they changed everything in hopes! Low liners is the next step! Just my opinion!The guy did what your doin. That may be covered on whats left on the warrenty low spec on liners was 19 or 22 I think ,They need to be at 25 - 29 thou above the deck. 68 your turn! opinion?

What he said! ^^^^^Check out the owner if ya can! He traded for a reason sumtimes just cus the warrenty is just about gone!

Talk to the guy IF you can!He might be just a fuss pot!Its not uncommon to see what your seeing!When guys fuss,What you dont want to see is resent repeat failers of PUSHING COOLANT( Unresolved)( meaning the last time it was in the shop were they chasing a coolant leak) /lots of Turbo failures, common are exhast gasket and egr cooler(coolant push)If the cooler was replaced resently you have a fix for that Make sure it has the stud spacer up date synco probs sometimes.Read carfully, The complaint, the cause and the cure ,Look for repeat stuff!Exhast gaskets require fuel lines each time thats not incuded as a repeat!Its a law!Note If the engine was worked hard you will see lots of exhast gasket jobs thats normal up to the stud update.On this year of truck the problems were quite under control. For the most part!

Bud The Best fuel milage Ive seen aset is 5- 6.5 here pulling vans average Most average just over 5, Most pull b trains here get in the 4- 5 range We also have hills lots of em.We have guys with MP engines getting seven + pulling vans, but then you have all the new problems But a warrenty. Crap shoot at best! That extra fuel savings will likly make the truck payment IF you get 8 . 8 is an estimate not real world 8 dosent inclue down time .When and if you have it. Crap shoot.

Cams were not too much of an issue! Sounds OK You need to ask if the studs are the latest and greatest design Complete with With spacers this is important!Its another 4- 6 hours labo and 200 bucks parts you don't need to spend, Are you content with the fuel mpg ? 68pro might know the part No# of the new stud set up!Check with him!

Welcome to the site! First check to see that the out put yoke bolt is tight on the trans!If so then you likly have a shift fork that is worn or a worn syncro pack this can be repaired in the truck but you will likly have to go to the dealer to have it done as it requires special tooling.

Its Called a VIP Its there to give you more information than you need to know!It also is there to cause us guys That work on em greif by means of giving you to much useless info !Having said that the truck will run fine with out it its better for me if you turn it off! However there is some decent info to be had from it some of the fault codes / fuel milage, boost, oil presure ,and ,water temps. it has a few good points. .

The truck has a vip you can check the trip and average mpg in that screen!Scroll there

bro it s a hard call with out the o/d!You could have somone look at the ecm avg mpg!

Warrety issues I think would have been handled by Mack .

Change the t stat 180 consistant! see what happens

Don't jump in yet,Whats been done ?Check history! maintance? The balance of warrenty is likly the block and stuff that won't fail!

Try turning the jake switch off while loading!If that don't work then you might try adjusting the timing a bit!The fuel pump might be worn some causing the timing to be off!Also what temp is it running at? to cold can cause this!

I would suspect valve guides or turbo seals !Does It smell like oil smoke or fuel!??Fuel smoke kinda burns the eyes! turn the jake off when your loading for a try thou.

Anything is possible! How much money do you have? You would need to build a new shift lid arragment! To involved for the average guy Id think!The lid has a lock out arangment inside that locks out the forward gears ya don't want to break somthing!

ffYup simple !Turn the jake off!As soon as the pedal is in the idle position the engine brake will engage!

Yup It Was A nightmare. ya had to be there to grasp the situation.It was embarrassing to say the least.Is the best words to describe it!

B61 Unfortunatley 3 Mechcanics didn't design and build this engine . Things would be a whole lot diffrent if they had. Don't forget this engine has been the back bone of the mack line for the last decade and all the stuff on it is bolton to get by reg's stuff the core engine is still good ole mack stuff. The coolant system however evolved, got changed to put up with the egr heat its been a dogs breakfast of problems since.They how ever have worked thru MOST of the problems! if 68 will send you all the sb for the coolant probs ensure you got ALL the upates Thermastat housing and plumbing reroutes ect the water pump is a quicky but make sure you get the right one! Hope ya get everything sorted out man. These engines can be made to hang in there, Problem is not everyone has the time, money or patients to get them there.

Trent two diffrent animals!22- 28 is spec on a v8 A good hot runing v8 500hp will be 28 -32 I beleive his is a 400!A 400 I would expect to see 22 24 maybe 25 max!If the fuel is stock!

Al the boost gauge was plumbed in the right spot the cross over is where to do it!You should be seeing 22 to 28 psi under a decent pull! You either got one hell of a leak or the turbo is not working right you should be trailing plumes of black smoke behind ya if theres a leak that big. Is the fuel pump robert bosch? if you don't have smoke .I would check the lda valve on the back top of the pump take the hose off at the engine end and suck on it if it will not hold a vacuam the diphram inside is fubar. Also if the engine has an air throtle make sure the dam thing is opening right up!

Worst part is if its the egr cooler your going to have to replace it now!If you do ! cap off that valve as Jerry did!