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1997 mack no start


Combinemack
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Welcome to the jungle!

When you say "won't start", what exactly do you mean?  Will it turn over okay but not light?  Will it not turn over at all?  Does it turn, but turn slowly?

The more details, the easier it will be for one of the guys to zero in on it.

"Eagles may soar, but weasels don't get sucked into jet engines."

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Is there any way there could be an air pressure switch shutting off the fuel supply?  Not sure if that would be intentional or accidental.  But, it sure sounds like the two are connected, doesn't it?

Maybe check voltage at a fuel shutoff solenoid (I am assuming there is one).

Sounds like a good one for one of the Mack technicians to answer...if any of them are still around!  This is a little (lot!) out of my field!

"Eagles may soar, but weasels don't get sucked into jet engines."

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What model Midliner is it?  Automatic  transmission too?  Some of the Midliners had a brake interlock switch, which made it so the engine would not start unless the foot brake was applied.

Edited by 41chevy

"OPERTUNITY IS MISSED BY MOST PEOPLE BECAUSE IT IS DRESSED IN OVERALLS AND LOOKS LIKE WORK"  Thomas Edison

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On 11/17/2020 at 2:10 PM, Combinemack said:

I have a 1997 mack medium duty truck,  it runs great but if the truck has air pressure built up it won't start. Pump the air pressure down with the brake pedal and then it starts right up. Any suggestions? Thanks 

You ever get this sorted out???

"Eagles may soar, but weasels don't get sucked into jet engines."

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