hi guys need your wisdom
i have a 1988 fj1200 it starts great can ride it for about 10 mins then it starves itself of fuel i shut it off and restart runs fine for about the same amout of time then have to restart it again ive switched pumps and pump relays and have tried rideing with cap open . it has to be something simple i hope!!!!! please help!!
thanks Dean Ritchie in victoria bc
Dean-
See if the problem goes away riding with the gas cap open. If so, then you need the gas cap flapectomy.
Dan
kinked gas line? have you had the tank off Dean?
Hi there :hi:
+1 to what Dan & Dads_FJ
This happened on my 86.The fuel lines kinked.I followed Mr blackstock's lead to fix it.
http://www.fjowners.com/index.php?topic=4411.msg38941#msg38941 (http://www.fjowners.com/index.php?topic=4411.msg38941#msg38941)
Might even be a fuel cap venting issue....might need a "flapectomy"
http://www.fjowners.com/index.php?topic=2024.0 (http://www.fjowners.com/index.php?topic=2024.0)
Cheers :drinks:
Jeff P
Quote from: Dads_FJ on May 18, 2012, 11:14:37 PM
kinked gas line? have you had the tank off Dean?
yes ive had the tank off didnt see any kinks and ive tried the open cap still same . i just dont get how it runs great for a few miles then dies and after restarting it runs great again for same amount of time
ty for your reply Dean
Quote from: Pat Conlon on May 19, 2012, 11:01:04 AM
You can pull your tank off, look at the lines and everything looks fine.
Only to put your tank back on, and have the kink reappear when things get warm.
My advice is to....Follow exactly, the factory oem fuel line routing
The single hose from the petcock to the Y splitter should be run *under* the 2 branch lines.
If you run the petcock line on top of, or over, the branch lines, you will get a kink.
Quote from: Deano on May 19, 2012, 01:53:21 PM
yes ive had the tank off didnt see any kinks and ive tried the open cap still same . i just dont get how it runs great for a few miles then dies and after restarting it runs great again for same amount of time
ty for your reply Dean
With a kinked line the fuel flows slower or not at all. Imagine that the kink is slowing the flow down, like the hose got smaller. With the engine at idle the fuel demand is minimal. The reduced fuel flow has no problem keeping bowls full. Once you start riding the fuel demand increases. The demand will eventually be greater than the kinked hose can provide and the bowls go empty. Now that you are stopped at the side of road wondering what hell is going on, the fuel has a chance to catch up and fill the bowls again. Same thing happens if the fuel tank goes into a vacuum lock. The air pressure in the tank is reduced when fuel drains into the carbs and the filler cap does not allow air in. Crack open the cap and air pressure equalizes and fuel flows freely again till a vacuum is formed again. The "Flapectomy" insures that the now missing flap cannot seal the air out while riding. A clogged fuel filter will also restrict flow. Some owners have discovered that the PO put one on, not knowing it was there they never changed it. Not sure but I am guessing that your 88' is a gravity feed like the 84 to 87 years. Hope this helps.
Quote from: FJmonkey on May 19, 2012, 02:11:29 PM
Not sure but I am guessing that your 88' is a gravity feed like the 84 to 87 years.
88 was the first year for the fuel pump
Hope that helps
and it sounds like he already checked that.................
Quote from: Deano on May 18, 2012, 07:26:24 PM
hi guys need your wisdom
i have a 1988 fj1200..................................... ive switched pumps and pump relays and have tried rideing with cap open . it has to be something simple i hope!!!!! please help!!
thanks Dean Ritchie in victoria bc
Quote from: Travis398 on May 19, 2012, 03:09:14 PM
88 was the first year for the fuel pump
Hope that helps
and it sounds like he already checked that.................
Quote from: Deano on May 18, 2012, 07:26:24 PM
hi guys need your wisdom
i have a 1988 fj1200..................................... ive switched pumps and pump relays and have tried rideing with cap open . it has to be something simple i hope!!!!! please help!!
thanks Dean Ritchie in victoria bc
This why I don't hunt for crocodiles or poisonous snakes. I'd be standing right on top them wondering where the hell they went... :dash2:
....and I'm standing right beside Mark wondering WTF just bit me..... :dash2:
Have you checked that the pump has 12V when the engine stops running? Tried switching the reserve switch? Check the ground (earth, return) wire for continuity, maybe you have an intermittent wire....
Along the line Rich is going down - also check the points on the pump. They could be worn and sticking when they get hot, then work again for a while after cooling down.
Chris W.
Quote from: Deano on May 18, 2012, 07:26:24 PM
it starts great can ride it for about 10 mins then it starves itself of fuel i shut it off and restart runs fine
Are you sure it's out of fuel?
You can hear the pump run to fill the carbs, So I am guessing if they are drained (or dry) it would take a minute or so to fill them back up.
Which means the bike might not start right up like you are saying.
To add more confusion............The 88 model not only got the new fuel pump but also got the new (at the time) digital control ignition which provides the control circuit for the fuel pump.
is it better to run @low gear hi rpm or hi gear low rpm i meam what does this bike like better 1988 fj1200?
just wonderin lol
Quote from: Deano on June 13, 2012, 06:19:16 PM
is it better to run @low gear hi rpm or hi gear low rpm i meam what does this bike like better 1988 fj1200?
just wonderin lol
Depends if you are racing or cruising, you have gobbs of grunt and only 5 gears. You be the judge.... The FJ power plant will give way more than most riders need or want. Pick your gear to suit your needs/wants.....
Quote from: Deano on May 18, 2012, 07:26:24 PM
hi guys need your wisdom
i have a 1988 fj1200 it starts great can ride it for about 10 mins then it starves itself of fuel i shut it off and restart runs fine for about the same amout of time then have to restart it again ive switched pumps and pump relays and have tried rideing with cap open . it has to be something simple i hope!!!!! please help!!
thanks Dean Ritchie in victoria bc
Hi Deano, Hello Guys,
I've got a FJ 1200 ABS '93 and it seams that I have the same problem like Deano here. So when I turn the ignition key the fuel pump primes for ~10 sec. Then I start the engine and it goes like a thing from Mad Max until when I am passing by the 2nd roundabout then it is slowly dying to stop. Turn the key off and on again the pump primes again for 10 sec and it goes again ... This way I can only ride it at night when nobody can see :crazy: ... I did the 'flaponotomy' to remove flaps from the Filler Cap this didn't change nothing. The the tank breathing hose is free of blockages, Fuel lines tidy and have no bends. The other thing to mention is when I have removed fuel filter from underneath the tank and connected fuel hose from the tap directly into the pump this improved the way it goes but it hasn't fix the problem with fuel starvation. Can the ignition unit be at fault and not send signal to the fuel pump after the initial 10 sec priming session ?
I have replaced the fuel pump as well with brand new FJ type pump.
Check the fuel filter?
Could be the fuel pump relay going bad. Try bypassing the pump completely by running a fuel line directly from the tank to the carbs and see it that makes it run longer.
DavidR.
Can I try to connect 12V and GND directly to fuel pump?
yes, just dont run it too long if its not pumping anything (popcorn)