Hot start problem resolved due to failed check valve in the DMCH fuel pump

I finally got rid of the hot start problem due to the failed check valve in the new DMCH fuel pump combo. I installed the S.U.R. and R. check valve. http://img.tapatalk.com/d/13/09/03/a9anudy6.jpg

It took about thirty minutes and after 3 days of running it I've not had a single hot start issue. Hopefully this is now a non-issue; my thought is an external check-valve will be an included item in the revised DMCH fuel pump combo.

A few shots of the installation...fairly straight forward.
http://img.tapatalk.com/d/13/09/03/ajuquru3.jpghttp://img.tapatalk.com/d/13/09/03/ejuvuhe7.jpghttp://img.tapatalk.com/d/13/09/03/a2eqyryr.jpghttp://img.tapatalk.com/d/13/09/03/unune4us.jpg

I installed mine over a month ago and still works. Mine is located much closer to the pump. The kit didn't come with hose clamps but fortunatly I had some left overs from accumulator job.
i think amazon was a little cheaper.

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Originally Posted by cybercusp

I finally got rid of the hot start problem due to the failed check valve in the new DMCH fuel pump combo. I installed the S.U.R. and R. check valve. http://img.tapatalk.com/d/13/09/03/a9anudy6.jpg

It took about thirty minutes and after 3 days of running it I've not had a single hot start issue. Hopefully this is now a non-issue; my thought is an external check-valve will be an included item in the revised DMCH fuel pump combo.

A few shots of the installation...fairly straight forward.
http://img.tapatalk.com/d/13/09/03/ajuquru3.jpghttp://img.tapatalk.com/d/13/09/03/ejuvuhe7.jpghttp://img.tapatalk.com/d/13/09/03/a2eqyryr.jpghttp://img.tapatalk.com/d/13/09/03/unune4us.jpg

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In fact, it is probably a good way to fix a problem with the check valve in the OEM pump setup too. The only question remaining is how it will hold up to E-10 fuel. Just be SURE to install it in the correct direction!!!!!!
David Teitelbaum

I was unaware that the new DMCH unit was having such problems with check valves. Good fix you developed here!

I just ordered my check valve. :)

George

I am going to be ordering one of these pump/sender combos in the near future, I find it very dissapointing that this is the fix if it is a common problem. I will be spending 400+shipping+duties, and I do not want to be spending 40+shipping more.

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Originally Posted by Josh

I am going to be ordering one of these pump/sender combos in the near future, I find it very dissapointing that this is the fix if it is a common problem. I will be spending 400+shipping+duties, and I do not want to be spending 40+shipping more.

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Yep it is a very known problem - even on units that should be good according to DMCH's supplier (such as mine). But you don't need to buy such an expensive check valve. Unless you want to be adding an external in-line check valve later, then I suggest doing it when you install the pump/sender combo, if not for anything more than insurance.

Here's the one that I just ordered - $14 including worldwide shipping, ships from Memphis, TN:

http://i.ebayimg.com/t/5-16-Check-Va...Rlg~~60_12.JPG

http://www.ebay.com/itm/5-16-Check-V...df8304&vxp=mtr

Or, you can get the $8 plastic unit, including worldwide shipping, ships from Miami, FL:

http://i.ebayimg.com/t/5-16-8mm-One-...Ghg~~60_12.JPG

http://www.ebay.com/itm/5-16-8mm-One...249e78&vxp=mtr

I don't see a pressure rating on that plastic valve. Looks like a vacuum type check valve. I would never trust it for 75 PSI fuel.

Quote:

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Originally Posted by Josh

I am going to be ordering one of these pump/sender combos in the near future, I find it very dissapointing that this is the fix if it is a common problem. I will be spending 400+shipping+duties, and I do not want to be spending 40+shipping more.

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You may Not have any issue with your combo/sender unit. But nothing is 100% failure proof. I don't see a need for you to get the Extra Check valve (insurance) unless you choose too. Even then you should be able to find a suitable check valve in CANADA.

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Originally Posted by DMC5180

You may Not have any issue with your combo/sender unit. But nothing is 100% failure proof. I don't see a need for you to get the Extra Check valve (insurance) unless you choose too. Even then you should be able to find a suitable check valve in CANADA.

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Yeah I know I can find the CV. However what I was getting at is buying a drop in solution for the pump/sender and having to upgrade parts right off the hop.