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Author Topic: throttle body recon.  (Read 1836 times)

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feeutfo

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throttle body recon.
« on: 06 October 2008, 21:03:53 »
some of you may remember an issue i had with throttle body on father in laws volvo c70? well after a lot of buggering about i took it off to recon.
bba reman want something in the order of 220 sobs which sounds a bit steep to me???
Question is does anybody know of a similar cheaper service? :y

for info volvo want 600 plus  ;D to fit new and includes re programming. a breaker will be cheaper initially but will still involve volve ro programing. >:(
so recon it is... :y

Thanks guys.
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Kevin Wood

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Re: throttle body recon.
« Reply #1 on: 06 October 2008, 21:09:49 »
Do you know what's actually wrong with it? I guess it's a DBW?

Kevin
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feeutfo

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Re: throttle body recon.
« Reply #2 on: 07 October 2008, 14:09:05 »
not without opening it up,yes it is dbw, but i am guessing from the fact the revs are dropping and almost slalling that the throttle is closing too much. If it was to high a rev or sticking i would look at it jamming or an air leak. But with  the revs dropping wo wa wo wa style i put it down to the electronics?
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Kevin Wood

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Re: throttle body recon.
« Reply #3 on: 07 October 2008, 14:20:14 »
Any fault codes from the ECU? The throttle is controlled by a servo motor so it has feedback of the throttle position. It the throttle is not doing what the ECU wants, the ECU should know about it.

Might be worth giving it a dose of carb cleaner before condemning it.

I also wonder about the programming. I don't really understand what there is to program that the ECU couldn't "learn".

Kevin
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feeutfo

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Re: throttle body recon.
« Reply #4 on: 07 October 2008, 16:02:49 »
Quote
Any fault codes from the ECU? The throttle is controlled by a servo motor so it has feedback of the throttle position. It the throttle is not doing what the ECU wants, the ECU should know about it.

Quote
Any fault codes from the ECU? The throttle is controlled by a servo motor so it has feedback of the throttle position. It the throttle is not doing what the ECU wants, the ECU should know about it.

Might be worth giving it a dose of carb cleaner before condemning it.

I also wonder about the programming. I don't really understand what there is to program that the ECU couldn't "learn".

Kevin

It is very clean to look at apart from a film of oil from the breather system i presume. A snap on diag gave 1711 which encompasses the phone book of codes all relating to inlet(maf, map, intake leak, exhaust leak,oh and oxygen sensor i believe), but no mention of throttle body directly!!! Yes i know, bare with me. We messed with changing maf and anything else that was related but nothing made a differance. So we concluded that the snap on code reader did not have the full software set so give the t body specific code, a bit vague i know but couple this with the fact volvo had diagnosed tb and had previously cleaned it(no sign of dismantling but it is certainly clean) which stopped the car stalling, and f in law says it drives much better, but did not stop the revs fluctuating. They then quoted 600 to fit a new tb. Also the car is on its second tb in 4 years which previously caused the same symptoms apparently.
Conclude tb fault.
 It would be nice to take  the air pipe off with the the engine running and see the throttle responding, or not, but this is impossible as the car is a 2.4 turbo(5cyl. Coupe) and the tb is bolted under the inlet manifold with turbo pipe in from the side, simply is not an option.

The same as you, i questioned the programming thing. Firstly volvo are adamant of this, and the story was backed up exactly by the Reading branch parts man and the service manager, useless muppet that he was when dealing with other minor non related issues. Also bba reman have confirmed the same, and that a recon. of the original unit would mean the said software would remain in the unit and could just be bolted back on.  F in law also remembers same from first failure.

And last but by no means least, i should mention, the c70 has been on watch dog due to same throttle body issue as volvo USA are changing the part under warranty. Volvo uk are not. Sounds about right i would say?
 Thanks for taking the time, Chris.
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feeutfo

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Re: throttle body recon.
« Reply #5 on: 07 October 2008, 16:22:04 »
wow, bba quoted 250 plus vat and postage. So nearly 300, about the price of a new one. Doh!  

I suppose the other option is to get a throttle body from a breaker and get that programmed? Hmm...
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Kevin Wood

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Re: throttle body recon.
« Reply #6 on: 07 October 2008, 16:24:43 »
Is it possible to dismantle it at all? Just wondering if a DIY repair is remotely possible. :-/ Bit of switch cleaner on the pots in there?

Kevin
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feeutfo

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Re: throttle body recon.
« Reply #7 on: 07 October 2008, 17:42:46 »
yes i have been eyeing the torx head bolts on the ends suspiciously for a while, i had a peep in my
Mrs's( polo) throttle body the other day... Ahem. Mechanically could find nothing wrong with it, it had a carbon/metal (?) disc with tracks on... Oh sod it ill have a look... Cant do any harm can it?  

By the way, bba  re confirmed the programming bit...
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feeutfo

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Re: throttle body recon.
« Reply #8 on: 07 October 2008, 18:10:18 »
also, it occurs to me, what if i find something. Something minor say, how do i test it? Its a right pain to rebuild it only to find its no differant. What if i find a busted bit. Where do i get the parts?
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Kevin Wood

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Re: throttle body recon.
« Reply #9 on: 07 October 2008, 18:12:45 »
Quote
also, it occurs to me, what if i find something. Something minor say, how do i test it? Its a right pain to rebuild it only to find its no differant. What if i find a busted bit. Where do i get the parts?

Stepping out into the unknown there...

I'd say get it recond if there's any doubt, given the price of a new one.  :o

.. or find a cheap one at a scrappy to practice on first.

I can see why Volvos are so expensive to run now.

Kevin
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feeutfo

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Re: throttle body recon.
« Reply #10 on: 07 October 2008, 20:40:52 »
well ive had one of the end caps off and if it weren't broke before it bloody is now. ;D ;D ;D ;D
 It aint ment to come apart, take the 4 screws out and pull the plastic end cap off to find one edge is glued in with some sort of resin with 3 metal contacts set into it.
Thats now broken but is the only way into the unit so bba would have to do the same, further in on the end of the shaft are little filaments that run on a track. they seem too short and worn and have scratched into the track, they also sit at an angle that would make the return stroke far from smooth and make them dig in. What a load of crap.
Several pieces of swarf fell out of the unit, to course to be ware so must have been from the manufacturing process. Magneti Morelli, somebody tell the italians to leave electrics alone. Thanks for the replies though Kevin, always helps to have a second opinion.

Still wouldnt mind another company to Quote on it. Any recommendations?
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Martin_1962

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Re: throttle body recon.
« Reply #11 on: 07 October 2008, 21:11:24 »
Get a scrapper and pass it to MDTM

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feeutfo

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Re: throttle body recon.
« Reply #12 on: 07 October 2008, 21:39:51 »
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Get a scrapper and pass it to MDTM

Really..? Can he reprogramme volvo throttle body? Might save a few quid if he can? They are impossible to get apart without damage...
Ill pm him later if he does not drop in.
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Martin_1962

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Re: throttle body recon.
« Reply #13 on: 07 October 2008, 22:01:17 »
Quote
Quote
Get a scrapper and pass it to MDTM

Really..? Can he reprogramme volvo throttle body? Might save a few quid if he can? They are impossible to get apart without damage...
Ill pm him later if he does not drop in.


No but I think he would see how it could be repaired
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iainb

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Re: throttle body recon.
« Reply #14 on: 07 October 2008, 23:04:37 »
Is the problem just with the throtle body ?
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