turboglenn
15+ Year Contributor
- 6,375
- 111
- Nov 5, 2007
-
RIpley,
West_Virginia
Well after almost ,7 years of dedicated e85 use in my dsm, I have formed a theory on one of the things e85 can actually harm. and that is the brushes in your fuel pumps. over about the last 8 months, I've experienced one Bosch 044 external that would randomly quit running, and it has only been on the car about 2&a half 3 years, 1 complete failure of a 255 HP in tank, and one 255 HP in tank that also intermittently cut out both of which were bought together knew about seven years ago when I first did a duel in tank set up for e85. . the ones that cut out you could tap on them and they would start back up again for an indeterminate amount of time, and with my curious nature I wanted to diagnose their failures so i cut all these fuel pumps apart carefully and found that the brushes we're extremely worn so much so that they were falling out of contact with the commutator (
which kind of explains why pounding on the fuel pump would make it work again for a while).. I found one of my incredibly old 255 pumps from my old Mustang foxbody days and dug up a 190 Walbro which both were still working and I cut them apart for comparison of measuring the brushes and the wear. and the ethanol dedicated pumps although clean had severe amount of wear for their age, compare two pumps twice as old that it only been in gasoline. honestly it's no big mystery really it would seem pretty simple the oven all content would want to wait any lubrication residue left by the gasoline, causing an almost cool dry friction on the parts, and almost further backing that theory is the fact that the two walbros lasted almost 7 years, and the brand new external 044 died right around its 3rd birthday. and I say this is because the external pump doesn't sit in a big cooling reservoir and gets hotter, which further accelerates the wear. now I'm not breaking new grounds for coming up with unknown theories, but I wanted to post to see if anybody else had seen or experienced any odd failures in anything related to the fuel system after a good amount of time of daily driving on e85... black goo doesn't count we all know that exists, and for me it's always been a lot easier to get rid of them the Internet rumors of it plaguing people, I've simply run two or three tanks of pump gas to the car in the winter to help it start and I haven't seen any black goo since my first Terri years on the corn juice
I apologize for the poor grammar and run on sentences but I've been away from home for 72 hours with only a phone to use, to post this
which kind of explains why pounding on the fuel pump would make it work again for a while).. I found one of my incredibly old 255 pumps from my old Mustang foxbody days and dug up a 190 Walbro which both were still working and I cut them apart for comparison of measuring the brushes and the wear. and the ethanol dedicated pumps although clean had severe amount of wear for their age, compare two pumps twice as old that it only been in gasoline. honestly it's no big mystery really it would seem pretty simple the oven all content would want to wait any lubrication residue left by the gasoline, causing an almost cool dry friction on the parts, and almost further backing that theory is the fact that the two walbros lasted almost 7 years, and the brand new external 044 died right around its 3rd birthday. and I say this is because the external pump doesn't sit in a big cooling reservoir and gets hotter, which further accelerates the wear. now I'm not breaking new grounds for coming up with unknown theories, but I wanted to post to see if anybody else had seen or experienced any odd failures in anything related to the fuel system after a good amount of time of daily driving on e85... black goo doesn't count we all know that exists, and for me it's always been a lot easier to get rid of them the Internet rumors of it plaguing people, I've simply run two or three tanks of pump gas to the car in the winter to help it start and I haven't seen any black goo since my first Terri years on the corn juice
I apologize for the poor grammar and run on sentences but I've been away from home for 72 hours with only a phone to use, to post this