Engine & Gearbox Cleaning Throttle Position Sensor

Discussion in '7th Generation (2003-2008) [Acura TSX]' started by Accord_N22, Tuesday 8th Mar, 2016.

  1. Accord_N22 Top Contributor ★ ★ ★ ★ ☆

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    Hi Guys,
    Just a quick question, wondering if it is possible to clean the throttle position sensor on the diesel models?

    Part is: 37971-RBB-003

    I read a few threads but can't remember if it was possible. Was it just the connector contacts that can be cleaned as i noticed the actual sensor itself is riveted to the bracket.

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  2. SpeedyGee Administrator Staff Team

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    Hmmm I'd leave it alone. Maybe get it on HDS and check the readings from it.
     
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  3. Zebster Expert Advisor ★ ★ ★ ★ ★

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    If you can get access to the interior, then you may be able to inject some switch cleaner in an attempt to clean it up inside and improve the internal electrical connections... I use Screwfix 'No Nonsense' penetrating oil spray, which is also a switch cleaner and I've found to be quite good.

    Is the damn thing German?
     
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  4. Ichiban Founder Staff Team

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    don't mention the war to zee grrrrmans
     
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  5. Zebster Expert Advisor ★ ★ ★ ★ ★

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    They can't even pronounce the name 'Angela' correctly, dammit.
     
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  6. ACC-CDI-2T Valued Contributor ★ ★ ★ ☆ ☆

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    .. but we now understand better ..

     
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  7. Zebster Expert Advisor ★ ★ ★ ★ ★

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    Very funny!

    Is Germans having a sense of humour a new thing?
     
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  8. ACC-CDI-2T Valued Contributor ★ ★ ★ ☆ ☆

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    ... yes, orderrrr of the leaderrrr .. :Laughing:

    @Accord_N22
    if the repair attempt does not help, you can get it cheaper in the USA - e.g.

     
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  9. Zebster Expert Advisor ★ ★ ★ ★ ★

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    That is still very expensive... I'd be looking at one from a breaker.

    I think 2.4 petrol models use the same part number.
     
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  10. Accord_N22 Top Contributor ★ ★ ★ ★ ☆

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    Cheers guys.
    Theres no MIL lights but I do feel a very slight jerkiness. I think i will check it out over the weekend
     
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  11. Zebster Expert Advisor ★ ★ ★ ★ ★

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    Best way to rule out the TPS/APPS is to compare acceleration performance under right foot control against acceleration performance under cruise control (e.g. pick up to a high set speed when engaged at low speed), as acceleration under cruise control does not use the TPS.
     
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  12. Accord_N22 Top Contributor ★ ★ ★ ★ ☆

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    Thanks Seb

    So do you mean.
    Start at lets say 40mph and keep clicking the cruise control speed increase button all the way to a speed example 60mph??
    then compared that to just using the the accelerator pedal at the same speeds?
     
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  13. Zebster Expert Advisor ★ ★ ★ ★ ★

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    That would probably be OK, but my suggestion was really to preset the cruise at, say, 70mph by driving at that speed and setting the cruise control, then brake down to, say, 40mph before hitting 'resume' and then monitoring how smoothly the car accelerates back up to 70mph. Then doing the same thing with the cruise control off using the throttle pedal. I think the benefit of doing it this way is that there'll be a bigger differential between the actual speed Vs set speed when you hit 'resume', so the car may accelerate harder?
     
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  14. Accord_N22 Top Contributor ★ ★ ★ ★ ☆

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    Ahh i see, thanks for that Seb.
    Not sure i have actually used the resume button before on the Accord? As when you brake the cruise is disengaged
     
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  15. SpeedyGee Administrator Staff Team

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    Resume takes the speed back to what you set it too., as it suggests But I'm not sure what rate it accelerates. I'd assume it would accelerate rather gently.
     
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  16. Bounder Club Member ★ ☆ ☆ ☆ ☆

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    The TPS is made by Keihin who make a lot of fuel stuff, Carbs, FI etc.
    Big enough Japanese company.
    I'd bet that those aren't rivets but actually tamperproof shear head bolts that the drive head shears off once the torque value is reached during assembly.
    If you feel like it you could cut a slot into the head with a hacksaw and use that as a method of unscrewing the bolts and replacing them with conventional hex or torx when you reassemble it after cleaning.
     
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  17. SpeedyGee Administrator Staff Team

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    Keihen are a subsidiary of Honda.
     
    Last edited: Friday 11th Mar, 2016
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  18. Accord_N22 Top Contributor ★ ★ ★ ★ ☆

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    Thanks guys.
    I think i may be able to get away with it.
    I managed to clean the throttle body and MAF sensor and the response has been improved dramatcially.
    I did however try the cruise control action and comparing it to manual acceleration and both reacted the same.

    I also got a quote from coxmotorparts for the part 37971-RBB-003
    £190 posted. Which isnt too bad.

    It is also available here much more cheaper (america)

    With postage and customs duty (paid through ebay in advanced) its around £140 posted which isnt too bad
     
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