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Old 06-07-2005, 09:47 PM   #1 (permalink)
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Default C50 stalling when hot

Anyone else have a problem with the engine stalling out when it's running hot in this hot weather. Mine keeps stalling out when I'm in stop and go traffic. Took it to the dealer, tried turning up idle a little but still ends up stalling. Gonna have to take it back and see if something else can be done.

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Old 06-07-2005, 11:04 PM   #2 (permalink)
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No, and I'd bet I've ridden my C50 in hotter conditions than you've had in PA.
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Old 06-07-2005, 11:35 PM   #3 (permalink)
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FJM, I'm not far from you and haven't had a problem with the hotter weather yet.

I haven't been out as much do to a bad ankle in the last week though.
I was out yesterday, it hit 83 here. No trouble.

I plan on riding more this week.

Still, it shouldn't happen.
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Old 06-08-2005, 12:03 AM   #4 (permalink)
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Quote:
Originally Posted by fjm3rd
Anyone else have a problem with the engine stalling out when it's running hot in this hot weather. Mine keeps stalling out when I'm in stop and go traffic. Took it to the dealer, tried turning up idle a little but still ends up stalling. Gonna have to take it back and see if something else can be done.

here in our area its been running upper 90's to 106 degrees... have not had this problem with my bike... suggest you really have a talk with your dealer's service manager... assume your bike is still in warranty.....good luck
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Old 06-08-2005, 08:57 AM   #5 (permalink)
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I rode mine yesterday in city traffic without any stalling. The fan seemed to come on quite a bit though. Also, this was only my second day to be "street legal" so I still have less than 100 miles on my bike...maybe the stall problem will develop over time. I think I'd let the dealer deal with it.
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Old 06-08-2005, 09:02 AM   #6 (permalink)
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I forgot to mention that it was around 90 degrees here yesterday and very humid.

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Old 06-08-2005, 10:34 AM   #7 (permalink)
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I've not seen this problem in 5000 miles since thye end of July '04 when I got my C50. The EFI system has been 100% smooth. Your dealer needs to properly troubleshoot and fix this problem, it's not a "feature"

Good luck and let us know how you do!
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Old 06-08-2005, 01:35 PM   #8 (permalink)
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I had mine stall one time. It was about 65 degrees, going down the highway about 65mph and the freinds I was riding with pulled off the road on a slight up slope. And after about 10 seconds it stalled. But it never happened again.
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Old 06-08-2005, 11:11 PM   #9 (permalink)
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I believe I have to turn up the idle a little more. It's only around 1000 RPM's according to the Tach. Can't really tell for sure cause the needle bounces to much. I believe I read somewhere that it should be 1100 to 1200 RPM's By looking at the Tach and the way the numbers are spaced I honestly don't think it's near that. I'll give it a try one more time. Was at the dealer today they said if it keeps happening bring it in. One thing they did tell me was to use higher octane then 87. They heard it pinging when they took it for a test ride I heard it a little bit but didn't put 2 and 2 together. So I'll try 89 and if it still acts up I guess I got to go to 93 octane. But I know I still have to turn the idle up. Just curious what octane other people are using.
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Old 06-08-2005, 11:22 PM   #10 (permalink)
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Suggestion: if available - take it to a different dealer. Sounds like these guys are trying to dodge a warranty fix. As I noted, I've never had a stall problem at all and have never put anything in the tank but 87 octane. And that includes getting stuck in traffic on a two lane road behind a school bus that stopped every 25 yards for 5 miles in 100+ temps late last summer. Only time I've ever noticed the cooling fan switch on. And my manual states idle at operating temps will be 1000rpm to 1200rpm, so you may want to get them to actually try and fix the problem before you go messin' round with that throttle stop screw.
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Old 06-09-2005, 02:12 AM   #11 (permalink)
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The cooling fan on my C50 comes on all the time.
I've been using 87 octane, and the temps have been in the mid 80s
to mid 90s with lots of humidity, in stop and go traffic.
The only time it stalls, is when I dont use the clutch/gear/gas properly.
Other than that, its been running like a champ thus far.
I 2nd the motion to get another opinion...
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Old 06-09-2005, 05:47 AM   #12 (permalink)
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Default Pinging ?

The dealer said they heard it ping and said try 89 octane.... strange A fuel injected engine you would think would not ping period. Do you gas up at the same place all the time ? if so,I would go some where else for a couple of tank fulls of 87 O and see the results. if your still pinging and stalling i would suspect the FI processor and or a sensor out of whack. hope this helps

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Old 06-09-2005, 06:20 AM   #13 (permalink)
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Quote:
Originally Posted by Danr
The dealer said they heard it ping and said try 89 octane.... strange A fuel injected engine you would think would not ping period. Do you gas up at the same place all the time ? if so,I would go some where else for a couple of tank fulls of 87 O and see the results. if your still pinging and stalling i would suspect the FI processor and or a sensor out of whack. hope this helps

I think the octane required has more to do with the compression ratio than the method of getting the fuel/air mixture into the cylinder.

I have had fuel injected cars for quite some time and without high octane gas the cars I had would tend to ping. These cars had fairly high compression ratios.
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Old 06-09-2005, 08:18 AM   #14 (permalink)
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I was utterly stunned when I bought my bike this weekend to see the recommendation of 87 Octane on a 9.4:1 compression...it seems correct, but I don't know why they wouldn't just put 93 in the book considering the operating parameters of such a small engine... I personally feel there are better detergents in 93 or sunoco 94 and it's worth the extrat 50 cents when I fill up a 4.1 gallon tank. Plus I am just used to having to put super in my cars...to avoid detonation under boost.

Granted this bike is water cooled and shouldn't have wild heat variations as an air cooled does....but why not just say 93 to cover their butts? If this thing comes from the factory on the lean side why risk detonation on a COOLER day. I hate to say it but for a FI bike to come Lean from the factory..I don't know why they didn't try to sneak an oxygen sensor on the thing to adjust a fuel map in 3D...instead of 2D reading from tables looked up according to a TPS and a coolant temp sensor...

The bike definately should be more prone to pinging on a cooler day than a warmer one due to a denser air charge coming in...you should be running richer on a hot day.

Plus I am just used to having to put super in my cars...to avoid detonation under boost.

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Old 06-09-2005, 08:53 AM   #15 (permalink)
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I get 85 and 87 all the time. Never had any problems pinging. We have ethanol in our fuel here in Nebraska (corn alcahol) and the higher octane fuels contain more ethanol. I think up to 20% and in some cases that will actually casue a ping especially on hot days.
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Old 06-10-2005, 12:02 AM   #16 (permalink)
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The manual plainly states that ehtanol blended fuels may be used if the ethanol content is not greater than 10%. Using a higher percentage blend may jeapordize your new vehicle warranty and the emmissions control system warranty. (Methanol blend limited to 5%).

FI has little to do with pinging - my Rodeo will often ping running on 87, but not on 89.

My cooling fan may run more frequently, but I don't notice it. I only noticed it that once because I was mostly stopped, coast forward 20 feet or so and stop, and repeat until you turn blue from breathing the exhaust of the POS cage in front of you.
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Old 06-11-2005, 01:21 PM   #17 (permalink)
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Quote:
Originally Posted by nelamvr6
I have had fuel injected cars for quite some time and without high octane gas the cars I had would tend to ping. These cars had fairly high compression ratios.
Pinging is from compression, not FI. My GF's FI Chevy Cavalier has never been near anything but the cheapest gas, no problems. My Acura, well, it specifies 92+ octane because of the higher compression ratio. No problems with ping in my C50 in over 5000 miles with nothing but 87 octane.
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