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Old 07-08-2012, 11:38 PM   #1
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Sled: 1998 Powder Special 600 EFI
1998 Powder Special problems

Last winter i was having a lot of problems with my 1998 powder special. I had the stator and the coil replaced and it still didnt run right, is there anything else i can replace in the off season to hopefully get it running right for this coming season? I could get it up to 3500 rpms then it would stay there almost like it had a govenor and whenever i would accelerate there would be a lag time from when i hit the throttle until when the engine would wind out. Some peolpe told me that the rpm problem could be caused by a bad clutch or belt,is this true?
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Old 07-09-2012, 10:14 AM   #2
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Your symptoms could be caused by a lot of different things. We would need more specific descriptions.

First, you say that it the RPMs only go up to 3500. The clutches should not even be engaging yet at that RPM. If they are, you may have a weak or broken spring in your primary clutch.

Lag can be caused by a number of things. Does it seem like a cylinder is cutting in and out? That could just be a bad plug wire, or it could be a broken reed valve petal, or a compression issue. If both cylinders are firing properly, it could be a sensor problem. The water temp sensor can cause problems. If it fails, the sled will run way too rich. Check it out, and also the wire that goes to it as they have a tendency of breaking in the insulation.

You could be having a problem with the Throttle position sensor, either being mis-adjusted, or having dead spots. Or, the delay could be caused by the Throttle safety system, which can be bypassed for testing.

You should be able to download a service manual for that sled, probably free. It will be a huge help in troubleshooting and will have testing procedures for the things I mentioned.
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Old 07-09-2012, 04:16 PM   #3
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The stator can still cause that symptom along with many other things. Where did you get the stator from?
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Old 07-09-2012, 09:38 PM   #4
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Sled: 1998 Powder Special 600 EFI
Idk where the stator was from i had my local repair shop put it in. I guess it was a brand new stator too. When it lags it bogs down and then it will accelerate sundenly. I have the wires for the kill switch unhooked but that didnt help any and the wire going to the water pump was unhooked and i hooked it back up and that still didnt help any. Also I thought that the powder specials had clutches that engage at a lower rpm than a zr 600.
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Old 07-10-2012, 10:56 AM   #5
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Does it feel like one cylinder is kicking in and out when it bogs and suddenly accelerates? That could just be a bad plug boot or wire. Removing the plug boots, trimming a half inch off the plug wires, and twisting the boot back on. Also look inside the boot for carbon buildup. These issues can cause intermittent spark.

Not sure what you mean by the wire going to the water pump. Do you mean the wire going to the water temp sensor near the Thermostat? If that was disconnected, it will cause problems, especially when the sled is warmed up. If plugging it in made no difference, you really need to test the sensor and inspect for a break in that wire inside the insulation. If your efi computer thinks the engine is cold (bad sensor or broken wire) your engine will run way too rich. That can cause the bogs and other problems you are having.

Last edited by Wyelde; 07-10-2012 at 11:37 AM.
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Old 07-10-2012, 01:41 PM   #6
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I did trim the plug wires and put new boots on too last winter and yes thats what i meant by the wire, so should i cut the wire and splice some new wire into it? and how do i test the sensor?
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Old 07-10-2012, 08:27 PM   #7
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What are the stator ohms?
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Old 07-10-2012, 10:23 PM   #8
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idk i never tested it because my wires had different colors than what other people have so idk which wire to check
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Old 07-10-2012, 10:29 PM   #9
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If you had your stator replaced last year I doubt its that again already but it could be. I would check your water temp wire and sensor if it was unplugged and made no diff when plugged in like stated above.
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Old 07-10-2012, 10:30 PM   #10
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Also get an ohm reading from the stator and that will tell you if bad or good!
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