TPS

[Rory's Dad]

Our 1600i is now with KT Green to get the electrical bits and pieces done  

I woud have prefered to do it all myself (in a pig-headed sort of way   ) but needs must.

I anticipate a 'discussion' about adjusting the TPS voltage.  The installation of the engine seemed quite 'plug 'n play' but the Webcon manual hides all sorts of mysteries fo a numpty like me      For example the TPS voltage should be between 0.785 and 0.795 (volts, presumably) and mine probably isn't and that is what's causing the emissions problem.  Mind you the auto electrician might fix it in two minutes    

My question is "What should I expect from a Westfield kit?"  I think when you are paying for 'everything' from Westfield then it should work first time out of the box provided you're assembled it according to the instructions.  What do you think??

Rory's Dad

[John Williams (Panda) - Joint Manchester AO]

i happen to agree!!

westfield supplied modules with a westfield supplied ecu; set to the supplied voltage by westfield.

ECU file setup file supplied incorrect and numpty here paying the bill, for the car to be transported to WF :-<

compared the files and whey hey they are different!

all the time and effort in mucking around!

Cheers

John

[Jenko]

I'm suprised the Webcon software does not allow you to calibrate the TPS - In Megasquirt you simply press a button when the throttle is fully closed, and then push the foot to the floor, and press another button...It's that simple, as is the code to do this.........The supplied TPS should give around the correct V for the management to understand...So, I'm guessing this will not be any sort of issue....Failing that, the TPS is easy to get right with a bias resistor...A simple bit ohms law would give the required value.....

[perksy]

Weber Alpha seems very reliable but unlike alot of ECU packages 'out there' the Software is only available at Weber Alpha dealers    

So when it comes to setting the TPS you just use a multimeter

This needs to be set accuratly so it can reference to the standard supplied map

bear in mind the standard supplied map is just that (standard)

and may not be suitable for your particular engine...

[nikpro]

The TPS needs to be set so the correct voltage is seen by the ECU - it is impractical for Westfield to do this on the engine module as it would need connecting into a loom.

Westfield will do it if you transport the car back to them.

[cast iron]

A problem I came across beeing completely stoopid. I fitted the TPS on my Sigma to the rear carb, as you probably would on a crossflow or VX, problem being the carbs are on the other side so the TPS was wired backwards! (think about it)    

I used Omex, apart from the Earthing problem calibrating the TPS was a piece of cake  

[hoobahole]

With the ignition on and the throttle bodies fully closed - press home the adjustment screw to ensure they are closed - you'll need to connect to the signal and negative at the loom connector (note - not the batt) and set the TPS to the correct voltage. Not sure about your engine install - but on my duratec it is held in position by 2 screws which need to be loosened off.

Once adjusted open the bodies a few times - using the voltmeter to check the voltage increases smoothly - and recheck the closed voltage. I'm anal and also check with the car running to take into account any pull on the butterflies.

It's an easy process if you have a multimeter.

[Rory's Dad]

It's an easy process if you have a multimeter.

... which you connect where and how??  My multimeter has two needles to play with.

Can you then tell me how the TPS is adjusted please.  Does the TPS rotate when you loosen the two screws??

Having an answer to hand would be helpful if the auto electrician gets stumped      

Thanks for your help - I understood about half of your replies  

Rory's Dad

[CedricTheBrave]

Yes the TPS rotates

what you are basically setting is the home position of the throttle.

the ecu knows that at the stated voltage the throttle is closed

so you set the throttle closed loosen the screws and twist the TPS until the said voltage is indicated. then tighten the screws, check again when tight and adjust if necessary.

you will never get it set by WF out of the box as there are too many variables that will send it out during construction.

[Rory's Dad]

... and how is the multimeter connected when it's all plugged up??  (Now where is that 'I'm really am beginning to understand this now' emoticon? Maybe a           combination does it)

Rory's Dad

[perksy]

... and how is the multimeter connected when it's all plugged up??  (Now where is that 'I'm really am beginning to understand this now' emoticon? Maybe a           combination does it)

Rory's Dad

Peel back the rubber insulation/boot on the back of the TPS to expose the rear of the terminals and use these to pick up the Voltage/s with the multimeter

[nikpro]

Trouble with using a multimeter is the meter reading voltage and what the ECU is 'seeing' are quite often different!

You need mapping software to set it correctly as the voltage the ECU sees is the important bit.

[KerryS]

Going back partly to the original question about "shouldn't this all work out of the box" I sort of felt the same with my Zetec kit from them. When all assembled it started and ran OK but a pre-SVA check by Paul Aspden showed emissions out so it was a trailer trip back to WF.

With hindsight, this perhaps should have been expected knowing a bit more now than I did then, but maybe WF coiuld have warned me I agree. One reason I went for what was called teh "Summer Madness" kit was WF saying it was plug n'play unlike the Speedsport version (with Jenveys instead of Ford injection) which they did say would need re-mapping once built.

[Rory's Dad]

Thanks for your all your help guys      

Will let you know the outcome.  Silence from KT Green atm ... either the auto electricain hasn't turned up ... or he's fixed it    

Rory's Dad

[perksy]

Trouble with using a multimeter is the meter reading voltage and what the ECU is 'seeing' are quite often different!

You need mapping software to set it correctly as the voltage the ECU sees is the important bit.

Couldn't agree more mate

Only problem is when using Weber Alpha your Knackered when it comes to that