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Thread ID: 129323	2013-02-18 01:28:00	Ford Ka	prefect (6291)	PC World Chat

Post ID	Timestamp	Content	User
1328513	2013-02-18 01:28:00	Any electrical whizzes here? Got problem with it over revving like push the clutch in after coming off the motorway its still going at a million RPM. Found the problem and sorta fixed it but would like to do a permanent and reliable repair. Thought the fault might be in the TPS so bought a new one from Henry but problem still there. Borrowed a Haynes manual and it said the idle voltage should be .4v if not rotate TPS (slack in the 2 mounting screws) till it is. Mine was 1.1V at idle and rotating it got.98V. No probs I thought drill out the holes to get more adjustment but cant get it lower than .65V by drilling the holes right out to the outside. Its not over revving but its still not at the spec voltage. The input volts at full throttle are cool at 4.75v. It is idiot proof to fit because if its fitted around the wrong way the butterfly is about half open way off the idle stop. Can I fit a variable pot on the slider wire? and what range should it be?. Could I after calculating use a fixed resistor ?. If I get a pot can I just solder it up to the existing wire? Way out of my comfort zone in this moon goon stuff. Thanks for any help. Anyone that says bad connectors, wiring faults or sticky cable I will scream. I would like to add the Henry place here has had the problem and could not fix it! and the customers sold and junked their kas and fiestas.	prefect (6291)
1328514	2013-02-18 02:24:00	If you can break the circuit to monitor the current (you can't rely on voltage across the resistance because you don't know what those values are unless the manual tells you) then you could add resistance at the supply side of the control until it sits in mid-range, which would give you some control in both directions. However, the unwanted voltage may be coming from the control input (the voltage you are trying to change) due to somethinng like a leaking cpacitor supplying additional voltage that you can't adjust out. I have no idea what a TPS is (in electrical language it is 'toughened or tough plastic sheath') but if you have access to the variable output and the ground connection, and you know what current is flowing, it might also be possible to shunt the output with another resistor. Problem is, you need to know the current level and the resistance of the control. Doesn't surprise me that Henry's boys can't resolve it, they are used to throwing stuff away, or the whole car. If it is a simple voltage divider, any electronics tech could probably sort it in no time flat, we are used to bodging our way around designers' brain-farts. I do it all the time for Electrical Engineers, and you'd think they would know better! Cheers Billy 8-{)	Billy T (70)
1328515	2013-02-18 06:37:00	Gareth Morgan has just bought a Ford Ka www.youtube.com	Lawrence (2987)
1328516	2013-02-18 10:01:00	Fix problem by getting rid of ford and buying Jap.	Cicero (40)
1328517	2013-02-18 19:07:00	From another forum . Don't know whether the Ka has a Throttle Potentiometer . This problem seems to happen over a wide range of English Fords . I had a similar problem with my Ford Focus 1 . 8 16v Zetec . My local garage had a feeling it was the Throttle Potentiometer, but upon replacing it, found it did not solve the revs . They were stumped . . . But following advice from Ford, they altered the Throttle Potentiometer . I don’t understand all they did, but the Potentiometer is meant to remain at a fixed position . However to resolve the high revs, they managed to change the voltage at idle to be 0 . 4v and when the Throttle is depressed to 0 . 6v . This did cure the high revs i was experiencing and it has been fine for over 2 years now . Hope it helps . . . :)	Trev (427)
1328518	2013-02-18 19:26:00	From another forum. Don't know whether the Ka has a Throttle Potentiometer. This problem seems to happen over a wide range of English Fords. I had a similar problem with my Ford Focus 1.8 16v Zetec. My local garage had a feeling it was the Throttle Potentiometer, but upon replacing it, found it did not solve the revs. They were stumped... But following advice from Ford, they altered the Throttle Potentiometer. I don’t understand all they did, but the Potentiometer is meant to remain at a fixed position. However to resolve the high revs, they managed to change the voltage at idle to be 0.4v and when the Throttle is depressed to 0.6v. This did cure the high revs i was experiencing and it has been fine for over 2 years now. Hope it helps... :) No	prefect (6291)
1328519	2013-02-18 19:27:00	Fix problem by getting rid of ford and buying Jap. The part giving the problem has made in Japan on it.	prefect (6291)
1328520	2013-02-18 19:46:00	Under license with a Lucas design probably.	Alex B (15479)
1328521	2013-02-18 20:13:00	Lucas have never had a design yet. Merely tragedy after tragedy. ;)	R2x1 (4628)
1328522	2013-02-18 20:20:00	Like the fuel injection system in the Triumph 2.5 PI and the TR6. :)	Trev (427)
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