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Posted: Mon Nov 05, 2012 2:27 pm
by kstevens
The quad runs great for about a 30 min ride, then quad starts to spit and sputter like its running out of fuel, if u hold it at 1/4 throttle or so once it starts to act up it runs smooth, hammer the throttle and it will bog as if its not getting fuel, very similar to a vapor lock on a carb application, and it will eventually shut off, after about 5-10 of sitting with fan running it will eventually fire up and run again for about 10-15 min no problem, then the process starts all over again. I have a fairly new fuel pump (within 2 yrs old) I have replaced, plug, coil, temp sensor, fuel filter. I thought about fuel pump relay but figures they either work or they don't.... PLEASE HELP, this is aggravating
Thanks in advance
Posted: Mon Nov 05, 2012 5:17 pm
by Blasterboy11
Silly to ask, but check the connector to the pump my moto did the same thing a while ago, same symptoms and it ended up being the clip cracked and slipped loose.
Posted: Mon Nov 05, 2012 5:32 pm
by kstevens
Silly to ask, but check the connector to the pump my moto did the same thing a while ago, same symptoms and it ended up being the clip cracked and slipped loose.
All wires and clips are tight, fuel quick disconnects have been gutted
Posted: Tue Nov 06, 2012 1:43 am
by speedracer
I have read about fuel boil on cdales,wouldnt the symptoms be similar?Maybe try some heattape where the header is near the tank,maybe even wrap your header.Is your gas cap venting?
Posted: Tue Nov 06, 2012 2:02 am
by kstevens
I have read about fuel boil on cdales,wouldnt the symptoms be similar?Maybe try some heattape where the header is near the tank,maybe even wrap your header.Is your gas cap venting?
This is a relatively new issue, it just started to do this one day and has continued since
Posted: Tue Nov 06, 2012 4:22 am
by cannondale27
You are wrong about the relay.When they act up they do so exactly as you are describing.Try removing it.
Posted: Tue Nov 06, 2012 2:40 pm
by kstevens
This is a relatively new issue, it just started to do this one day and has continued since
Thanks, I will try that this weekend, it is the relay under air filter, correct?
Posted: Wed Nov 07, 2012 2:11 am
by cannondale27
Yes thats the one.Just take it out and see if it runs right.
Posted: Wed Nov 07, 2012 11:42 am
by kstevens
If it doesn't need pump relay to run, what's the purpose of having one?
Posted: Wed Nov 07, 2012 4:51 pm
by wistech
They run fine without them. If you really have vapor lock in my experience there will be no fuel flow in the filter and your tank will be a rolling boil. It only happened to me after several hours of slow riding in extreme heat so a half hour is doubtfull. More common than not is an air leak in your suction line. Most likely the quick connect oring.