XX no start after running

3369 Views 14 Replies 11 Participants Last post by jcooksey, 1 mo ago

Jbusser

Discussion Starter · May 11, 2022

I have a 2018 xx with 5500 miles. The machine always starts normally with good idle in the mornings, however, after turning it off after riding for 10 mins or so and trying to restart after a few minutes, the machine will not start. I eventually get the machine to start after 4 to 10 attempts but it has a very poor idle and will stall out if the gas pedal is touched (i do get the occasional back fire when trying to start). Once I put the machine In gear and get moving, it will run absolutely fine with no issues and will idle normally. That being said, I can smell gasoline at times. If I turn the machine off for a couple hours and let cool down, it still won't start. It seems the machine needs to sit overnight before it will fire up like normal again. Fuel pressure is fine and nothing wrong with Injectors. I've read that some gapped down the spark plugs to .02-.025 but I have a hard time believing that this would fix my problem (though I am certainly willing to try). Any advice is appreciated! Thanks in advance!!

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Hollywood

· #2 · May 11, 2022

Welcome Jbusser. Although I don't know much about the XX, an engine is an engine. Always check the easiest stuff first. First, how do you know the injectors are fine? Especially smelling gas? Have you checked all the vent lines? Is one kinked? Hard 5500 miles? Might need a valve adjustment? Possible fuel pump issue?

Jbusser

Discussion Starter · #3 · May 12, 2022

Hollywood said:
Welcome Jbusser. Although I don't know much about the XX, an engine is an engine. Always check the easiest stuff first. First, how do you know the injectors are fine? Especially smelling gas? Have you checked all the vent lines? Is one kinked? Hard 5500 miles? Might need a valve adjustment? Possible fuel pump issue?

Hi there, thank you for the comment. We pulled the fuel rail off with Injectors and used some compressed air to test for leaks. We then plugged the fuel line back into the rail and plugged in the Injectors and observed the Injectors when we attempted to crank over the engine. Again, we didn't see any leaks and the Injectors appeared to be spraying gasoline appropriately. The 5500 miles were not particularly hard miles. I will be checking vent lines this weekend and I will ask my mechanically inclined neighbor about adjusting valves. Thanks again!

NDHotbodies

· #4 · May 12, 2022

check your gas cap and vent tubes.. they tend to build up pressure in the tank..

Sam I Am

· #5 · May 12, 2022

I had something similar. Mine would start hard and run like shit until it warmed up. Ended up being the ignition coils. If I cranked long enough I'd smell raw gas.

Rbr

· #6 · May 18, 2022

Jbusser said:
I have a 2018 xx with 5500 miles. The machine always starts normally with good idle in the mornings, however, after turning it off after riding for 10 mins or so and trying to restart after a few minutes, the machine will not start. I eventually get the machine to start after 4 to 10 attempts but it has a very poor idle and will stall out if the gas pedal is touched (i do get the occasional back fire when trying to start). Once I put the machine In gear and get moving, it will run absolutely fine with no issues and will idle normally. That being said, I can smell gasoline at times. If I turn the machine off for a couple hours and let cool down, it still won't start. It seems the machine needs to sit overnight before it will fire up like normal again. Fuel pressure is fine and nothing wrong with Injectors. I've read that some gapped down the spark plugs to .02-.025 but I have a hard time believing that this would fix my problem (though I am certainly willing to try). Any advice is appreciated! Thanks in advance!!

My xx will do the same thing if I try to start it with my foot on the gas

Grey Rider

· #7 · May 23, 2022 (Edited)

My 2018 XX is having a similar issue. First start of the day it fires right up but runs a little rough for maybe 20 seconds and then idles fine and runs smooth. Turning it off after driving for a while at normal operating temperature it is hard to start. It cranks fine and after the normal delay it fires once or twice and dies. It takes 2-3 attempts and when it starts it is very rough and I have to play with the throttle to get it going somewhere near normal idle. After restarting like this it seems to run normal at speed and will idle OK. There is often a gasoline smell too.
Just a thought: I recently cleaned the spark arrestor and found it about 1/3 clogged with fine cotton like material. After running 20 or so hours I checked it again and the buildup was starting again. Has anyone with the hard warm start checked the spark arrestor? I'm wondering if the packing in the muffler is clogging it a bit causing the hard restart.
Also, in a bid to find out if the hard warm start issue was ignition or fuel, I ran the engine until 190 degrees and switched it off. Then sprayed starting fluid into the air intake immediately after the start up issue while the engine was struggling to find a smooth idle. The engine nearly died. I think the issue is a fuel problem, too much fuel causing flooding. Explains the gasoline smell that accompanies the startup problem.

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Carpetman

· #8 · 8 mo ago

I’m having the same issue on my 2019 Wildcat xx with 4000 miles. Starts fine then after running for a few minutes if I turn off and try and crank her over it won’t start and smells like fuel. When I’m out driving it runs perfectly fine. Over the weekend it was running rough so I put new spark Plugs in and that took care of the rough idle. After a few days of checking different things it still is hard to start and smells like fuel after she is warm. Letting it cool down for a while then I can get it to start.
My friends joke around about don’t shut it off when you are out driving because you won’t get it started again

. But now after a few days after I changed spark plugs it appears they may be fouled again because when I get it started it runs really rough and eventually dies. Any thoughts would be appreciated.

Jbusser

Discussion Starter · #9 · 8 mo ago

Carpetman said:
I’m having the same issue on my 2019 Wildcat xx with 4000 miles. Starts fine then after running for a few minutes if I turn off and try and crank her over it won’t start and smells like fuel. When I’m out driving it runs perfectly fine. Over the weekend it was running rough so I put new spark Plugs in and that took care of the rough idle. After a few days of checking different things it still is hard to start and smells like fuel after she is warm. Letting it cool down for a while then I can get it to start.
My friends joke around about don’t shut it off when you are out driving because you won’t get it started again . But now after a few days after I changed spark plugs it appears they may be fouled again because when I get it started it runs really rough and eventually dies. Any thoughts would be appreciated.

Hey there, I regapped plugs to .022, checked fuel tank vent line, inspected fuel injectors, tested fuel pressure, and changed my oil and I haven't had a problem since. I'm not sure what exactly fixed the issue but I've put on another 1500+ miles on the XX and it starts every time cold or warm. Hope this helps. Good luck!

Carpetman

· #10 · 8 mo ago

Thanks for the info jbusser. I just borrowed my friends Wildcat XX coils and put them in my XX and it did not make it any better. I will try and gap the spark plugs, these plugs are less than a week old.

Attic Cat

· #11 · 6 mo ago

Carpetman said:
Thanks for the info jbusser. I just borrowed my friends Wildcat XX coils and put them in my XX and it did not make it any better. I will try and gap the spark plugs, these plugs are less than a week old.

Does the xx have a fuel pressure regulator, if so where is it located.

Ragdoll XX

· #12 · 6 mo ago

I had a similar issue, and it was the fuel pump. It had somehow come loose from the bracket in the tank and fallen down in the tank but continued to work and pump fuel. It wasn't until I was out of fuel it didn't start. I thought it had fuel because of the position of the pump the float showed a fuel level on the dash gauge. I checked all the things the internet said to check before checking the tank too. Once I found the issue, all I had to do was reattach the pump to the bracket.

Attic Cat

· #13 · 6 mo ago

Ragdoll XX said:
I had a similar issue, and it was the fuel pump. It had somehow come loose from the bracket in the tank and fallen down in the tank but continued to work and pump fuel. It wasn't until I was out of fuel it didn't start. I thought it had fuel because of the position of the pump the float showed a fuel level on the dash gauge. I checked all the things the internet said to check before checking the tank too. Once I found the issue, all I had to do was reattach the pump to the bracket.

I have installed a new fuel pump , problem still exist but thanks for info.

Reactions: 1

j-mat

· #14 · 2 mo ago

Has anyone found the solution to this concern? I have the same problem and tried all the listed possible solutions with no luck.

jcooksey

· #15 · 1 mo ago

Sam I Am said:
I had something similar. Mine would start hard and run like shit until it warmed up. Ended up being the ignition coils. If I cranked long enough I'd smell raw gas.

Exactly what happened with my car, new coils made it feel like a new car again.

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