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Good call Mike. Did you get a chance to jump back on it Jayco?
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No, not yet.. still waiting on my new electric fuel pump to arrive... I just didn't like the sound of the old square unit, so replacing it with a new round one like my newer model.Good call Mike. Did you get a chance to jump back on it Jayco?
Please explainHowdy,
NOTE: Word of caution!!!
Make sure you have the quad winding fix applied. Excessive cranking is what zaps the stator.
Howdy,Please explain
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So, what I do. Is leave the pumps in place and remove the hard lines and zip tie them out of the way. Then use a 3/4 wrench and take the top of the pump off, be very careful because there is a spring under there. Take out the spring, then use needle nose to take the metering valve out and then you will be able to see the top of the plunger. Spray with carb cleaner and let sit for a while and work the shut off solenoid back and forth. Then hit the dead crank a couple of times and see if the plunger is going up and down. Worse-case scenario is the plunger is still stuck and you will need to take a brass punch and lightly hit the plunger working it as described above.Ok, FINALLY got back to this gen....
Replaced the electric fuel pump and confirmed good fuel flow to the bottom of the mechanical fuel pumps. No start.... So I cracked the line on top of the mechanical fuel pumps and nothing... No fuel flow while trying to start!! Not even a dribble.
I pulled that mechanical pump to make sure the cam lifter was moving during rotation, and yep, it's moving up and down and should be moving the mechanical plunger...
Anyone have a good process for testing these mechanical fuel pumps? Anyone have a braekdown diagram of these pumps, or a process for taking them apart and trying to clean them?
I can always just try to take it apart and wing it, but I hate to reinvent the wheel if someone has already figured out a solid process...
Thanks!
awesome , which lines did you remove and fill with carb cleaner ? I’m needing to do the same thing . Is there a photo/ diagram referenceSUCCESS!!!! Ok, I took the top hard fuel likes off the fuel pumps, filled each with carb cleaner, let soak for 30 min, dead cranked for 5 sec, soaked with carb cleaner for 30 min, dead cranked for 5 sec, soaked with wd40 for 5 min, dead cranked 5 sec... soaked wd40 for 1 min... dead cranked 5 sec.
Hooked the hard lines back up... electric prime for 60 sec, dead cranked 5 sec... electric prime for 60 sec, dead cranked 5 sec... electric prime for 60 sec, and hit the starter and poof it started right up!!! It sputtered a tad for the first min or so. I let it run at 60hz for a few minutes, then added a small load of a few fans and started checking the power... it's stable power on all 3 -phases, and purrs like a kitten now!!
THANK YOU to ALL for your input and ideas!!
ok I understand now , thank you very much for clarifying, and for the other assistance thru messages .Hi Leonardo82nd, you have a different issue than Jayco did.
You are getting smoke while cranking so you are probably getting decent fuel out of the injectors. ( or at least some of them )
Jayco had stuck metering pumps and used carb clean in the pumps to loosen them up.
On your machine the carb clean is going to be used as a fuel, starting assist, not a cleaner, so you want to spray a little into the air intake, not much, start with just a quick spray and try it.
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