DF 150 - high idle speed - buzzer warning

[brycer]

not to highjack this thread but i am having the exact same problem with a used 2006 df140 i bought and rigged myself on my lund. It came with no battery cables so i just made some up. It starts and runs fine but is stuck on high idle and keeps beeping. Where is this white wire you speak of and i assume it runs from the battery to the ?. Thanks if anyone can help.

[orohde]

I was thinking of doing so, but this is not like grinding in and outlet valves like in a regular engine block, I think. I can not use the IAC valve as the oposit "male" part and by only resurfacing the manifold I suspect it will be out of spec for a new IAC valve. The local Suzuki motor shop could not recommend such procedure either (they sell parts, but still).

Thanks for comments. If someone has a possible explanation for how the fault could appear in the first place, I am very interested. The local Suzuki motor shop could not explain.

[orohde]

My experience with the white lead was that when I removed it, the engine stopped

If we are talking about the same white lead, this should not have anything to do with the high idle rpm. My white lead runs from the battery + into the engine in front, turns to the right lower part and is here entering a one lead plug. I do not know which part in the engine that require this +12V connection.

[orohde]

I finally got the parts, a new manifold and a new IAC valve. I did the repair myself with the use of a very impressive service manual by Suzuki. The motor and in particular idle was better than ever. I also discovered that I had sympthons/warnings about this failure earlier last summer season. When I started a warm engine the idle rised quickly and just as quickly it went down and stalled. I had to use the neutral trottle lever in order to avoid stalling. Thanks for your inputs on this tread. Even if i now had warnings I still do not know exactly how tha fault could develop the way it did.

[OceanTrvlr]

I've had this happen on two different DF150s (out of four) in the past couple of years. All four engines have occasionally experienced some kind of detonation in the intake on cold start along with a puff of smoke from the air intake on the cowling. My local Suzuki service shop hasn't heard of this happening to anyone else; they also asked the regional Suzuki service rep who also didn't have any input.

I've had this popping happen on all four of the Suzukis I've had but cannot determine why. I'd like figure it out so I don't have to keep replacing the very expensive intake manifolds and IACs. Any thoughts.

Yes, this is my first post on this forum. Hopefully, I can contribute some knowledge here.

Ethan