Im working on a 96 blue bird school bus with a 5.9 12v cummin. It will start right up when it wants but some times it will just crank mainly when its been driven a lone drive but now it dose it frist thing in the morning. It's got me stumped dose any one have any ideas?

 

is it super cold where u are? cuz if its been doing it just now in these recent months its because of cold air. the air might be too cold to ignite the fuel. a lot of people get confused when it wont start after the engine is warmed up after theyve shut it off like at a fuel station (personally i keep her running if im no longer than 10mins or so stopped somewhere), its the cold air going into the head. trying pulling it into a warm garage or a spritz of ether will do er

 

It not that cold maybe low 40s at night right now but it did it when the motor was hot in the summer. P.S. in Ohio

 

Is it throwing any smoke out the exhaust when cranking and not starting? I would think its a fuel issue, there certainly not a problem with spark

 

if ur refering to me i didnt say anything about spark bud

 

That was supposed to be a joke

Now you want to tell me if its throwing smoke while its crankin?

 

no smoke when cranking

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I understand its a fule issue but what i dont get is that if you let it sit it will start on frist crank when you try bout 30min to an hour later.

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Today has been the coldest day so far at 28 degerees and it started up frist try its like it cant perform under pressure only happens when i need it.

 

sry bro i was a bit fired up last night about somethin else