gl 1200 ltd cheats


Information and questions on GL1200 Goldwings (1984-1987)
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roar
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Location: Norway kristiansand
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gl 1200 ltd cheats

Post by roar »



Hi
Today I was out on a long trip with my gl1200ltd, after about 20 minutes the engine starts to cheat, see the tachometer that something is wrong when it ranges 2-400 rpm for about 3-4 minutes, after which the bike goes well of the trip, someone who has an idea of what it can be
roar
norway



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DenverWinger
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Re: gl 1200 ltd cheats

Post by DenverWinger »

Hi Roar,

Through the language barrier I don't think we understand what you mean by the engine "cheating". Can you please try to explain more clearly?
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roar
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Re: gl 1200 ltd cheats

Post by roar »

The engine dosent go clean at steady rpm (unevenly)
Roar

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AZgl1800
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Re: gl 1200 ltd cheats

Post by AZgl1800 »

I gather what he means is "surging" in that the RPM is going up and down constantly at low idle.

Or, at a constant throttle at low speeds?

I tried using the Google Translator, and "cheating" is not a Norway word.
~John

'02 GL1800
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roar
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Re: gl 1200 ltd cheats

Post by roar »

Cheatlng means fusker in Norwegian
Same AS unevenly in stedy 2000 rpm
The engine yoke is uneven at steady rpm 2000

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julimike54
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Re: gl 1200 ltd cheats

Post by julimike54 »

Is it surging (fosser) at 2000 rpm?
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wlkjr
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Re: gl 1200 ltd cheats

Post by wlkjr »

I had an '83 Sabre that would sometimes start skipping or losing rpm for a few seconds. It was one of the ignition coils that controls two of the cylinders. I swapped the two coils and the problem went to the other two cylinders. After replacement it never happened again.
So you could have one of your ignition coils going open for a few seconds. There are two coils and each supplies spark to 2 of the cylinders. That would be my first guess.

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Rednaxs60
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Re: gl 1200 ltd cheats

Post by Rednaxs60 »

These fuel injected 1200s can be a challenge to troubleshoot. Having two and been through the wringer on both, I would suggest that you need to do a system check of all the components to rule out potential problems. If you don't you can be chasing your tail so to speak, and not get to the root cause of the issue.

Rule out the fuel system. Check fuel pressure IAW OEM specs. Have you changed the fuel filter ever? The TPS and fuel system have similar symptoms when faulty or failing.

The TPS must be calibrated IAW the OEM manual. It can affect the engine operation on acceleration and steady running. The TPS can be faulty even if there is no error code on the ECU for the TPS. Have a read of this web site regarding this: http://autoditex.com/page/throttle-posi ... -22-1.html The interesting part of this article was the oscilloscope figures showing a good TPS and faulty TPS. had this issue with my second '85 LTD. The engine would run fairly well in the 3900 to 400 RPM range or more, but did not like the lower RPM ranges. Changed the TPS and the engine started to perform as it should. There was no error code on the ECU with the faulty TPS installed.

The Ns (crank shaft sensor), Gr/Gl sensors (on the back end of the right cylinder head), PB sensors are probably good if there are no error code for any.

Have you balanced the left/right cylinder banks IAW the OEM instructions? The OEM recommends you first use carb cleaner and spray it into the intake manifold for each cylinder to clean the throttle plates - engine is to be running. Once you do this then balance the right/left cylinder banks and set the idle. After this you can check the TPS calibration IAW the OEM instructions.

Once you get this far, and all is well, I would recommend checking the coil/spark plug firing. With the engine running, you can remove the plug cap from a cylinder - do one at a time and you should feel the engine rpm drop, and hear the spark in the plug cap. Do this for each cylinder. You can also remove the spark plugs and check the colour of the plugs. Should all be the same or very close.

Have to go through the process in order to isolate the issue. Can spend a lot of time guessing. Good luck.
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roar
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Re: gl 1200 ltd cheats

Post by roar »

If j say skipping or losing rpm for a few seconds
in stead of cheats :)
roar

roar
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Re: gl 1200 ltd cheats

Post by roar »

Can j test the THROTTLE POSITION SENSOR (TPS) with av voltmeter whats the prosedure
Roar

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Rednaxs60
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Re: gl 1200 ltd cheats

Post by Rednaxs60 »

roar wrote:
Sun Jun 24, 2018 10:15 am
Can j test the THROTTLE POSITION SENSOR (TPS) with av voltmeter whats the prosedure
Roar
Yes you can but you need to either get the Honda inspection adapter that goes in the wiring between the TPS and the connector under the shelter. You can make your own inspection adapter by cutting the wire(s) from the TPS to the TPS connector under the shelter and soldering in three wires that you can use.

Good luck.


"When you write the story of your life, don't let anyone else hold the pen"

Ernest

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