Full Throttle Switch On Tps On 2 Row Mi16

[philfingers 5]

After fitting the Golf TB the other day I got the closed throttle switch wired up but there was no provision for a full throttle switch so I never hooked it up. What happens when this full throttle switch closes at full throttle. Does the ECU then supply more fuel, on top of what it's supplying as a result of the AFM flap moving towards fully open?

Full thottle performance seems a little bit lower than the Mi TB, which was all working with closed, medium and Full throttle giving the ecu the correct signal

 

Phil

[petert 587]

I was always under the assumption that it moved from the part throttle maps to the full throttle maps.

[Jon_Bmw 13]

I was always under the assumption that it moved from the part throttle maps to the full throttle maps.

 

Correct, but alledgedly according to my brother, even without the signal it can work out if it is on full throttle, without the signal, due to the amount of air going through the AFM flap. This might take a few seconds for it to realise, so it might be a bit flat, then come on cam if you like...

 

When we swapped out our broken TPS(same issue as yours phil) for another one, it made no noticeable difference. They seem to not operate when the throttle cam pushes hard into the TPS housing when you bolt them up. Putting 2 4mm washer spacers in between the throttle body housing and TPS cured it for us.

Edited August 9, 2009 by Jon_Bmw

[philfingers 5]

So did it make a noticeable difference when it was working correctly? The 16v golf doesn't have a full throttle switch, just the idle one, so I#d need to fabricate something with a micro switch of some description

[Jon_Bmw 13]

It didn't make a noticeable difference Phil, I did write that in the above bit...

 

But what it does allow is easier ECU mapping on full load as you know that it is using the full throttle maps, if that makes sense. Otherwise it could be using a combination of part throttle with a trim map. All very confusing, and I don't understand it fully, but in your case I doubt it would make that much difference.

 

I am always quite suprised people do this Mod, and grinding/polishing the mi16 TB. I would have thought the AFM is the biggest restriction, but the very same AFM is proven on bmw m20 engines to NOT provide a restriction till you get to the 200bhp region...

 

I understand you changed because the linkage was less than adaquate though, so fair enough.

[DrSarty 90 1 Cars]

I am always quite suprised people do this Mod, and grinding/polishing the mi16 TB. I would have thought the AFM is the biggest restriction, but the very same AFM is proven on bmw m20 engines to NOT provide a restriction till you get to the 200bhp region...

 

Can you clarify what you mean here please Jon?

 

What I mean is, are you saying the (Bosch IIRC) Mi16 AFM is identical to the one used on a certain BMW? I don't know what an M20 is I'm afraid; is that the engine, and if so, in which models are we talking about?

 

I was talking to Anthony about this because I'm sure companies that make AFMs must sell several of the same model to different manufacturers. Finding out those models would make getting replacements from breakers a lot easier. For example Anthony said a Calibra uses the same AFM and I said I bet some Volvos do. What's important I guess is the AFM manufacturer's part number being identical. A Volvo AFM if it does match is likely to be in much better nick and much less fiddled with than one from an Mi.

 

As for restriction, I agree. The AFM plus the feed piping length, turns, diameter and materials used are more of a restriction than the air filter itself. What I'm interested in is this 200BHP restriction you mention, because {a} I tend to agree with that figure and {b} if it's the same AFM than that means the Mi16 on AFM will be restricted the same.

 

So 3.5 questions really:

*what other cars (BMWs plus) is the Mi16 AFM fitted to?

*What's the full, correct part no.? (and who makes it?)

*And what's the 200BHP restriction worked out from?

Edited August 11, 2009 by DrSarty

[philfingers 5]

Jon, no i thought you'd meant it made no difference because the one you fitted wasn't working either because of the washer issue which fixed it originally, any ok fair play

 

Rich, no idea, could be tho, it's only a potentiometer in there so could well be a std thing. Have you got a copy of the autodata cd? if not get a hold of version 3.18, you can download it from www.getmiro.com . under the specs for different cars it's tell you the resistor readings, I'll do some research later,

 

Phil

AFM.pdf

Edited August 11, 2009 by philfingers

[philfingers 5]

see attached above

[Jon_Bmw 13]

Sarty, i'll post up later a more detailed response. Just nipping out.

[petert 587]

*what other cars (BMWs plus) is the Mi16 AFM fitted to?

 

A good question and one I've never really worried about as there's always been enough good AFM's floating about. However, a good place to start might be this website:

 

http://www.tunerpro.net/downloadBinDefs.htm

 

Compare Motronic models with equivalent Mi16 production years ie '88-92

[jackherer 543]

A good question and one I've never really worried about as there's always been enough good AFM's floating about. However, a good place to start might be this website:

 

http://www.tunerpro.net/downloadBinDefs.htm

 

Compare Motronic models with equivalent Mi16 production years ie '88-92

 

try www.atpelectronics.co.uk/

 

They were fitted to Vauxhalls/Opels and Alfa Romeos.

 

Edit:

 

Alfa:

75 2 litre 'Twin-Spark' 88-92

155 1.7/1.8/2 litre 92 on

164 2 litre 'Twin-Spark' 87-92

Spider 2 litre 90-94

 

Vauxhall/Opel

Ascona 2 litre 8 Valve 86-88

Astra GTE 2 litre 8 Valve 89 on

Carlton 2 litre 8 Valve 87 on

Cavalier 2 litre 8 Valve 87-90

Frontera Sport 2 litre 91 on

Edited August 13, 2009 by jackherer
added list

[DrSarty 90 1 Cars]

Nice one Kieran!

 

I can see a mad rush of people now, printing off that list and zooming off to scrap yards all over the country.

 

That's what I would do...but then, I'm weird.

 

P.S. One day I'll spell your name right.

Edited August 13, 2009 by DrSarty

[jackherer 543]

I can see a mad rush of people now, printing off that list and zooming off to scrap yards all over the country.

 

They'll be searching on ebay I reckon, I wonder if ebays search trend analysis software picks up on stuff like that...

 

P.S. One day I'll spell your name right.

 

haha and that day is today

[philfingers 5]

aye there'll be a profusion of 'Mi16' AFMs with odd part numbers on Ebay now :-)

[jackherer 543]

Nothing new there then

 

Actually the Bosch part numbers are the same across all those cars, 0 280 202 202

[philfingers 5]

is that 2 or 3 row?

[jackherer 543]

Either.