M11 cold blooded?

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M11 cold blooded?

April 10, 2012, 08:28:02 pm

New to me(fourth owner) 97 450 red top m11 starts with a lot of coach shaking and some cold smoke for the first 45 seconds or so. 60 degrees ambient temp. No preheat.

Normal?

What helps? Can't find the fuel filters?

Used to 80's and early 90's foretravels.

Thanks for looking. Also has anyone uprated the m11 red top successfully.....

Bob hulka

Re: M11 cold blooded?

Reply #1 – April 10, 2012, 09:19:36 pm

Dave M uprated his. You will need a new turbo and maybe an way to hold it on... Also, if your coach is Electronic, then there maybe help for you yet. There were 27 upgrades to my ECM when I had mine done and a bunch dealt with hard start and cold starts. Now it turns over with no effort and fires right up and there is no need for the boost switch. Because there was no preheat they had more revolutions programed in to heat it up before the fuel would fire. That is the big difference now, it will fire in fuel sooner and it starts right up. I had to start at 9 degrees with no pre heat or warm up. Started right up and while it was a bit rough for a min or so it settled right down and purred.

Re: M11 cold blooded?

Reply #2 – April 10, 2012, 09:23:23 pm

So take it to cummins? It's on me or them?

Keep it coming

Re: M11 cold blooded?

Reply #3 – April 11, 2012, 12:25:32 am

Bob, fuel filters are in the last bay on passenger side where the eng. batteries are located.

Re: M11 cold blooded?

Reply #4 – April 11, 2012, 01:12:41 am

Quote from: rbark – April 11, 2012, 12:25:32 am

Bob, fuel filters are in the last bay on passenger side where the eng. batteries are located.

Thanks Richard

Re: M11 cold blooded?

Reply #5 – April 11, 2012, 07:51:43 am

WOW !! Smoking 45 seconds after startup, I would be gong beyond filters to the Cummins shop, have the injectors checked, all the adjustments on the head, if all looked good there, a compression check is in order.
The M11 / ISM are not smokers, maybe a very light puff at startup, but clean up immediately and idle smooth.
White smoke is unburnt fuel mostly, could be water, but that is different.
Unburnt fuel is due to poor adjustments, bad injector(s), low compression.
Some times things go past the local guessing game.

Cheers
Dave M

Re: M11 cold blooded?

Reply #6 – April 11, 2012, 07:54:43 am

It is on you to have it reflashed. Upgrade not recall is the reason. They will do it free under warranty but not out of warranty. They will also tell you if it fries you need to bu a new one. Not all Cummins shops will do it either but the bigger ones that are company stores can. I would also take it to Cummins and have them dyno it. You should not get smoke. I got smoke on my Duramax and it was injectors.

Re: M11 cold blooded?

Reply #7 – April 11, 2012, 10:54:00 am

Thanks to all I have a Monday am appt with the cummins dr to check it out. Ran ok but with no recent comparisons hard to know what could be better.

Bob

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M11 cold blooded?

April 10, 2012, 08:28:02 pm

Re: M11 cold blooded?

Reply #1 – April 10, 2012, 09:19:36 pm

Re: M11 cold blooded?

Reply #2 – April 10, 2012, 09:23:23 pm

Re: M11 cold blooded?

Reply #3 – April 11, 2012, 12:25:32 am

Re: M11 cold blooded?

Reply #4 – April 11, 2012, 01:12:41 am

Re: M11 cold blooded?

Reply #5 – April 11, 2012, 07:51:43 am

Re: M11 cold blooded?

Reply #6 – April 11, 2012, 07:54:43 am

Re: M11 cold blooded?

Reply #7 – April 11, 2012, 10:54:00 am

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