tps settings

stavross

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• May 22, 2010

• #1

working on my mates '03 1150 twin-spark today set the tps to .36 and it ran like a bag of spanners, like it was on one cylinder. reset it, and at .57 it now seems to be running fine. is this normal? do the twin sparks have different settings? everything else is set up ok.valves,end float,throttle bodies, new plugs. I have an '02 single spark and it is set to .36 and runs fine.

 

Colban

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• May 22, 2010

• #2

I've read somewhere that a setting of over 0.4V is seen as an error by the ECU.You may be possibly be masking another fault on the twin-spark (coilstick?) by increasing the TPS voltage.The ECU thinks that the throttle butterflies are open further than they really are and is pumping a tad too much fuel in.

 

stavross

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• May 24, 2010

• #3

thanks for that, looks like we'll have to delve deeper.

 

Timolgra

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• May 24, 2010

• #4

Try setting at .371

 

stavross

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• May 24, 2010

• #5

cheers, will try that.

 

Keith Chapman

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• May 24, 2010

• #6

A twin spark running shite, I would check coil sticks before playing with the TPS setting.

 

Steptoe

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• May 24, 2010

• #7

Keith Chapman said:

A twin spark running shite, I would check coil sticks before playing with the TPS setting.

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Well done Keith , I'm amazed no one has mentioned it yet....

 

Timolgra

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• May 24, 2010

• #8

Colban said:

I've read somewhere that a setting of over 0.4V is seen as an error by the ECU.You may be possibly be masking another fault on the twin-spark (coilstick?) by increasing the TPS voltage.The ECU thinks that the throttle butterflies are open further than they really are and is pumping a tad too much fuel in.

Click to expand...

Steptoe said:

Well done Keith , I'm amazed no one has mentioned it yet....

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... but is that correct, just interested to know

 

Steptoe

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• May 24, 2010

• #9

Timolgra said:

... but is that correct, just interested to know

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Sort of - just that the stated voltage is wrong.

 

stavross

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• May 24, 2010

• #10

thanks for the replies.willl have to check the coil sticks. just one point though - is it normal that by increasing the tps setting, the engine is running fine, if it was a coil stick wouldnt it run rough no matter what the setting?

 

rudiemoto

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• Jun 6, 2010

• #11

a coil stick can run good but as load is increased the coil can break down and starts to miss ..
had it on 1150rt