Honda TPS for my Conversion
Discussion
Currently building a K20 for my Elise. Ive got 2 Honda throttle bodies in my garage. One looks decidedly ropey but has a good throttle position sensor on it. One looks like new, but the TPS is smashed. Ive looked at swapping the TPS over, but 2 things have struck me.
1) They are held in place with rivet type fixings which dont look like they are supposed to be removed
2) The position of the TPS looks like its been set by Honda then theyve been fixed in place, ie, if you took it off, would you be putting it back in the right position. if I drill the fixings out and swap over, fixing in place by some other method, will I loose some setting which Honda have made at the factory?
1) They are held in place with rivet type fixings which dont look like they are supposed to be removed
2) The position of the TPS looks like its been set by Honda then theyve been fixed in place, ie, if you took it off, would you be putting it back in the right position. if I drill the fixings out and swap over, fixing in place by some other method, will I loose some setting which Honda have made at the factory?
JTBUSH said:
Currently building a K20 for my Elise. Ive got 2 Honda throttle bodies in my garage. One looks decidedly ropey but has a good throttle position sensor on it. One looks like new, but the TPS is smashed. Ive looked at swapping the TPS over, but 2 things have struck me.
1) They are held in place with rivet type fixings which dont look like they are supposed to be removed
2) The position of the TPS looks like its been set by Honda then theyve been fixed in place, ie, if you took it off, would you be putting it back in the right position. if I drill the fixings out and swap over, fixing in place by some other method, will I loose some setting which Honda have made at the factory?
they are on snap-head bolts, if your carfull you can remove them and then just use M5 set-screws.1) They are held in place with rivet type fixings which dont look like they are supposed to be removed
2) The position of the TPS looks like its been set by Honda then theyve been fixed in place, ie, if you took it off, would you be putting it back in the right position. if I drill the fixings out and swap over, fixing in place by some other method, will I loose some setting which Honda have made at the factory?
position is important, if you read HELMS, it has a section on how to set it using a volt-meter (assuming it's in a working car).
it's not that big a deal, it;s something I must have done 100+ times now.
There in lies the problem, Scuffers. Its not on a working car yet. Finally getting round to building the engine after having the components for 8 months (wedding now out of way).
Therefore, would it be best to initially use the scruffy looking throttle body then swap it over once the car is running?
Therefore, would it be best to initially use the scruffy looking throttle body then swap it over once the car is running?
JTBUSH said:
There in lies the problem, Scuffers. Its not on a working car yet. Finally getting round to building the engine after having the components for 8 months (wedding now out of way).
Therefore, would it be best to initially use the scruffy looking throttle body then swap it over once the car is running?
OK, probably said that wrong, buy 'running' I mean in a position to run...Therefore, would it be best to initially use the scruffy looking throttle body then swap it over once the car is running?
Usually it is the resistance you check when setting a TPS, so the TPS doesnt need to be connected.... it just requires that the two poles of the resistive circuit are accessible.
You can measure it's resistance on the existing body and then set it to the same after transference.
Dave
You can measure it's resistance on the existing body and then set it to the same after transference.
Dave
Edited by DVandrews on Saturday 11th December 14:26
DVandrews said:
Usually it is the resistance you check when setting a TPS, so the TPS doesnt need to be connected.... it just requires that the two poles of the resistive circuit are accessible.
You can measure it's resistance on the existing body and then set it to the same after transference.
Dave
HELMS book quotes a voltage, problem with a resistance is that there is some variance in POT's, (as in total across the scale) hence why they use a voltage reading.You can measure it's resistance on the existing body and then set it to the same after transference.
Dave
it's important to get this right as all kinds of things in the ECU rely on accurately knowing where zero throttle is.
JTBUSH said:
So, is it best for me to just use the complete but scruffy TB for now, then swap over once its all set up and running?
Whats Helms book, scuffers? Ive got the service manual but never come across HELMS before!
yes, and the service manual is part of HELMS (do a search on it)Whats Helms book, scuffers? Ive got the service manual but never come across HELMS before!
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