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Old 08-22-2006, 04:20 PM
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Default Suzuki Df 70 Idle Air Contrlol Sensor

I have a IAC sensor or air intake control valve that that is intermittantly going bad.

Anybody every replaced one of these in their backyard?

I am trying to decide if I want to tackle this or not.

I am getting a slow flashing check engine light and a 10 second inteval warning buzzer. The zuki shop can find no "hard" codes to indicate what the problem is.

Chris
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Old 08-22-2006, 04:24 PM
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Default Re: Suzuki Df 70 Idle Air Contrlol Sensor

Is your battery good? Mine would something like that with a weak battery.
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Old 08-23-2006, 05:37 AM
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Default Re: Suzuki Df 70 Idle Air Contrlol Sensor

Find another Suzuki dealer. As you have been told before on this board you either have a faulty charging system, poor electrical connections or a bad ECM. What makes you think your IAC is faulty?
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Old 08-23-2006, 08:26 AM
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Default Re: Suzuki Df 70 Idle Air Contrlol Sensor

IAC's are easy to replace. But the warning code for a bad one a 3,1 code. 3 beeps pause 1 beep pause. If you have a 1,1 code, it is rectifier regualator overcharging.

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Old 08-23-2006, 01:02 PM
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Default Re: Suzuki Df 70 Idle Air Contrlol Sensor

Thanks for the reply.

The battery is hot and very strong. I pulled it and had it tested under a load as well.

Chris
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Old 08-23-2006, 01:09 PM
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Default Re: Suzuki Df 70 Idle Air Contrlol Sensor

When the ran the computer diagnostics on the engine the charging system showed up as working fine. It was putting out 13.2.

The sheet showed that I had several instances of the IAC failing intermittantly. I also made note that the engine has been running 2o degrees warmer ( not enough to trigger a warning buzzer). I would expect different codes and more problems with operation if teh ECM was faulty.

All in all the IAC was the only thing that should failure and it was hit and miss.

Of course the buzzer and check light never flashed the 20 mintues that the mech had it running.

Chris
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Old 08-23-2006, 01:12 PM
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Default Re: Suzuki Df 70 Idle Air Contrlol Sensor

Your are right....that is the code but when the mech put it on the diagnostic computer everything with the charging system checked out fine. I pull the battery and took it to Auto Zone and had it tested and it is A okay.

Strange.
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Old 08-23-2006, 08:26 PM
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Default Re: Suzuki Df 70 Idle Air Contrlol Sensor

How old is the engine? Since it is intermitant, you may have a poor ECM ground or battery connection. A bad ECM may only trigger a false check engine code, and not show any other symptoms. It's all in the service manual flow charts for diagnosing check engine codes.
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Old 08-23-2006, 08:47 PM
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Default Re: Suzuki Df 70 Idle Air Contrlol Sensor

Lale,

The engine is a 2000 DF 70.

I have scrubbed the battery terminal so I know they are good. I am not sure where else to look for bad grounds.

I have a Clymer book on this engine and I am not too impressed with it.
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Old 08-24-2006, 05:54 AM
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Default Re: Suzuki Df 70 Idle Air Contrlol Sensor

You have a number of battery & ground connections on the engine itself. Your dealer should have checked all these items. Get a factory manual if you insist on trying to work on this engine yourself.
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Bar Harbor, Maine
www.lakeandsea.com

Factory authorized dealer for Suzuki, Nissan & Tohatsu outboards, and Key West & Seaway boats, and Seastar EPS/Optimus 360 Steering Systems.

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Old 08-24-2006, 06:22 AM
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Default Re: Suzuki Df 70 Idle Air Contrlol Sensor

Lake,

I think that he just ran the diagnostic computer on the engine. That is all we discussed was the read outs.

I really enjoy tinkering on the engine and enjoy understanding the ins and outs of working on it. It can save me some money, lenghten the service life and...keeps me off the streets.

A factory manual is on the way.

Chris
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Old 08-24-2006, 10:00 AM
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Default RE: Suzuki Df 70 Idle Air Contrlol Sensor

Chris;
Could you possibily be talking about the throttle position sensor which is located on the top of the air intake tube and the throttle hooks to the bottom of the same tube. You can adust this your self using a volt meter (digital) but you will need the shop manual to get the exact spec for adjustment.

Good luck
Jerry
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Old 08-25-2006, 05:49 AM
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Default RE: Suzuki Df 70 Idle Air Contrlol Sensor

Quote:
jerrywindy - 8/24/2006 10:00 AM Chris; Could you possibily be talking about the throttle position sensor which is located on the top of the air intake tube and the throttle hooks to the bottom of the same tube. You can adust this your self using a volt meter (digital) but you will need the shop manual to get the exact spec for adjustment. Good luck Jerry
Suzuki 4-strokes do not have a throttle position sensor as the 2-strokes have - they have a closed throttle position switch. It's either on or off. This engine is not displaying any symptoms of a CTP switch being faulty.
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Lake & Sea Boatworks
Bar Harbor, Maine
www.lakeandsea.com

Factory authorized dealer for Suzuki, Nissan & Tohatsu outboards, and Key West & Seaway boats, and Seastar EPS/Optimus 360 Steering Systems.

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