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My 3900 airtop wabasto furnace will not operate properly it will only work somewhat on the lowest setting it takes three starts and shut downs before it will give any heat if you put it to the second

I have checked and rechecked all electrical connections I shortened my fuel supply line to the fuel pump and to the furnace I have checked to make sure my fuel pickup pipe was not bent into the fuel tank I did a battery test full twelve volt supply is great.i installed this furnace three years ago and have been trying to figure this problem out ever since.a year ago I removed it from my boat took it to a repair guy but no difference when I reinstalled.i would love to figure this problem out ps I installed a wabasto 3500 airtop on my last boat and it worked great ant the new owner tells me it still does thank you

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

MrRodneyLong
  • 55 Answers

SOURCE: 95 F150 2wd, interrupted fuel from the front fuel tank

my idea, the pumps are working agianst each other. what is the line pressure supposed to be? I think the rear pump is burning the new pumps up. is the rear pump running when the front pump is running? Let me know MrrodneyLong@gmail.com

Posted on Jul 04, 2008

Mike258
  • 1498 Answers

SOURCE: 1997 GMC K1500 4x4 5.7 ex.cab SFI injection system

Hey there boatright33,

A few things things immediately come to mind.

There may be a problem with the engine controller. You could check the ODBII onboard diagnostics. Auto part stores will usually do this for you at no cost.

When you pulled the ones that were/went bad, how did the filters look? Could there be particulate matter still in the tank causing them to fail.

I always put this one off until last. Check the injectors. Are they gummed up?

Let me know what you find out
Mike


Posted on Aug 12, 2008

  • 4 Answers

SOURCE: fuel system

it may work again but that is only temporary it sounds like the fuel filter is clogging up

Posted on Feb 23, 2009

DAD5bbbbg
  • 111 Answers

SOURCE: 2000 Pontiac Sunfire Fuel pump not working

check and see if you have an emergency shut off in the trunk. it will be on either side of the finder wall. it is there in case you get in a accident. the button pops up. make sure the button is in all the way. that shut off might be your problem.

Posted on Mar 02, 2009

  • 708 Answers

SOURCE: Having trouble to start the van, battery, starter all seems to

check your battery cables. Make sure they dont pull out of the lugs and make sure they are grounded properly as this will cause you this problem. had similar experience not long ago.

Check the alternator to. You can take it in and have it tested or jump start it and disconnect your battery and see if it dies. IF it dies then the alternator is bad.

Posted on Oct 03, 2009

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