Detroit won't start when cold????

When did that happen? It used to have a lot of kerosene in it.

 

Long time ago

 

Still flammable according to the MSDS sheets....I've used it within the last 6 months as a starting fluid.

http://www.wd40company.com/files/pdf/msds-wd494716385.pdf

http://www.wd40company.com/about/history/

 

It won't start a 2 cycle like they used to

 

I haven't seen the one on the rear of the head fail yet, but definitely seen the Davco valves full of junk. I had one a few weeks ago so bad that I couldn't believe it even ran. The only complaint was hard to start after sitting. Cleaned it out and the problem was gone.

 

Would a cruded up check valve on the Davco rob fuel mileage too?

 

If it is clogged anywhere near like the one I repaired yesterday it sure could. Not sure how the fuel was even flowing it had so much junk in it.

 

+1

I second this one as well. I have seen several trucks that folks thought were losing fuel prime and it was a bad SRS sensor.

I have seen lots of back of the head check valves go bad though. It does not take much to allow leak back on these and I have never been able to get one cleaned out good enough to reuse. Once they stop seating right it is game over. So replace it.

 

I have a 12.7 detroit 470hp and I had this problem before. I had to replace my srs and trs sensors and it solved the problem.