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Old 12th June 2020, 09:47   #21
Teflon
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Hi Cliff,

I´ve got further questions.
How did you manage to remove the axle and its bearing marked in the picture? And how did you manage to make the mechanical parts so shiny? Are they freshly galvanised?
Interesting - your throttle body appears to be different to mine. On mine, the part you have arrowed has no axle or bearings, it's just a blank casting. If you look closely, you'll notice the screw holes on yours are blanked off on mine . Out of interest, what does that connect to on yours?

The mechanical parts were indeed re-plated, however I can't take credit for that - it was done by member "Sagalout".


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Is it possible to remove the two marked plastic parts without damaging them?
Honestly don't know, but I'm sure Sagalout will advise if you send a PM.



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And my annotation to your 98%-problem: I´m quite sure that a T4-session will resolve it. Haynes manual describes that this could be necessary after removing or swapping the throttle body.
Thanks, that's what I'm hoping. MarinaBrian has confirmed that Haynes is wrong when they state that this may also be necessary after disconnecting the battery, so they don't have a great track record in the throttle body department, but you never know .

Cheers,

Cliff
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Old 12th June 2020, 11:34   #22
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I believe the area marked with the red arrow in the first photo holds the second butterfly where traction control is fitted
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Old 12th June 2020, 12:15   #23
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That would explain it - no traction control on mine.

Thanks

Cliff
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Old 12th June 2020, 13:14   #24
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Quite correct, that is where the traction control butterfly is fitted. Just a common body casting.

Bastelmann, No you cannot remove those plastic parts, they are cast in-situ with the arms during manufacture. I did remake some as part of a throttle body remake. A complex assembly that used mechanical fixings and a space filling resin mix with specially turn parts..

Refinish appears to be bright zinc plating (BZP) with a brown passivation.
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Old 12th June 2020, 23:21   #25
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had similar issues, took out the idle valve, cleaned it with some methylated spirits and fixed the issue.
throttle position sensor is a pointometer (variable resistor) so i thought was pre set and the ecu took its reading off it so didnt think was adjustable?
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Old 13th June 2020, 11:45   #26
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Yep, I'm pretty sure my issue is down to the idle valve. All new parts now, so may just need to do the throttle re-set process properly.

I'll be trying again in a few days or so, but in the meantime, I'm just enjoying having the car working properly after 12 month + of piston slap .

Cliff
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Old 17th June 2020, 08:29   #27
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The mechanical parts were indeed re-plated, however I can't take credit for that - it was done by member "Sagalout".




Honestly don't know, but I'm sure Sagalout will advise if you send a PM.
He did and that´s the way he treated the mechanical parts:



"Hi, I only unclipped two of the push on plastic parts. I dipped them in brick acid, the kind that builders use, it doesn't melt the plastic. I zinc plated them and put some extra brightner in the bath, I then dipped them in Gold passivate for the shine. If you're careful you won't have any problems doing the same, I've done every nut and bolt for my build, all new stuff but re-plated for a better finish".
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Old 17th June 2020, 09:55   #28
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Exclamation Throttle re-set procedure

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I've a feeling I may not have done the throttle re-set procedure properly ...
Cliff,

The throttle re-set procedure involving depressing the accelerator pedal five times applies only to the MEMS engine management fitted to the 1.8 engine. It does not apply to the KV6 Siemens system. Here's what RAVE says:

"The ECM does not require the 'closed throttle position' to be set. It will learn the closed throttle position over a short period of time and adapt itself to use this value."

Simon
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Old 17th June 2020, 10:57   #29
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Cliff,

The throttle re-set procedure involving depressing the accelerator pedal five times applies only to the MEMS engine management fitted to the 1.8 engine. It does not apply to the KV6 Siemens system. Here's what RAVE says:

"The ECM does not require the 'closed throttle position' to be set. It will learn the closed throttle position over a short period of time and adapt itself to use this value."

Simon
So Cliff just have to drive his car and the problem solves by itself? If only any problem would behave like that ...
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Old 17th June 2020, 13:37   #30
Teflon
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Originally Posted by SD1too View Post
Cliff,

The throttle re-set procedure involving depressing the accelerator pedal five times applies only to the MEMS engine management fitted to the 1.8 engine. It does not apply to the KV6 Siemens system. Here's what RAVE says:

"The ECM does not require the 'closed throttle position' to be set. It will learn the closed throttle position over a short period of time and adapt itself to use this value."

Simon
Thanks for that Simon. I'll have another go in a few days and perhaps just give it a bit more time to settle down. The new throttle body is actually the original one from the car, and it's now been fitted with a brand new Idle Control Valve, so it should work fine.

Cliff
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