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- Newsgroups: rec.autos.tech
- Path: sparky!uunet!munnari.oz.au!bruce.cs.monash.edu.au!merlin!yang
- From: yang@resmel.bhp.com.au (Sam Yang)
- Subject: Re: Converting to electronic ignition
- Message-ID: <Btvz7F.I3z@resmel.bhp.com.au>
- Summary: Australia, USA
- Keywords: air-points, electronic ignition, convertion, Bosch, Piranha
- Sender: usenet@resmel.bhp.com.au (network news)
- Organization: BHP Research - Melbourne Laboratories, AUSTRALIA
- References: <BtoK9E.Lwy@resmel.bhp.com.au>
- Date: Tue, 1 Sep 1992 06:25:37 GMT
- Lines: 58
-
- In article <BtoK9E.Lwy@resmel.bhp.com.au>, yang@resmel.bhp.com.au (Sam Yang) writes:
- >
- > Hello Friends,
- >
- > This is an enquiry about converting a points ignition system into an
- > electronic one for a Toyota Corolla 10/1983 KE70 Wagon. The car has
- > a 1.3L 4 cylinder engine (4KC). The similar article was posted 7 hours
- > ago but it did not appear in the net.
- >
- > I drive about 80km/day to work. One of the problem with the car is that
- > it eat contact points too quickly -- one in about half a year. The
-
-
- Hello Friends,
-
- Thanks for all those who replied to my original post. The summary
- together with new questions are the following:
-
- [1] Several people indicated that cars manufactured after 70's in US all
- use electronic ignition. However, I found many (maybe most?) cars in OZ
- before 85(?) still use contact points ignition. Does anyone has an
- explanation to this? One thing I could think of is that OZ is not cold
- enough in winter to cause icing problem for contact points, so it is not
- necessary to use electronic ignition and that the MAIN advantage of the
- electronic ignition over the conventional contact points is that the EI
- works better in cold winter.
-
- [2] Everybody expressed that the EI is superior to the contact points
- ignition. Does the contact points ignition has anything better than the EI?
-
- [3] In my original post, I said that the points in my car were burnt in
- 6 months of time. Several replied indicated that this is too short. They
- suggested me to check the capacitor and the coil, etc.. Actually, the
- points were badly pitted and the color of the contact surface was
- black/blue. I checked the capacitor using a multi-meter resistance range.
- The needle moved a bit and returned to infinite resistance reading. From
- my knowledge of electronics, there was nothing wrong with the capacitor.
- Do you know how to test the coil? The ballast resistor was changed
- several month ago on the road side by the RACV mobile repairer and I am
- not sure if they put the right resistor or not. Do you know the
- specifications of the ballast resistor for a 4KC engine?
-
- [4] I did a carburetter job about a year ago because the engine did not
- deliver much power in high throttle. Press the accelerator pedal further
- down more than about half way will not give noticeable power increase
- (even decrease). When the engine rev is higher than ~3500rev/minute,
- press accelerator more than half way only produce a loud exhaust noise
- but not power increase. The problem went away (at least for the exhaust
- noise) after I increased the carburetter petrol level for about
- 1.5mm ~2mm (by adjusting the float level). Does the above suggest a
- poor ignition? My reasoning is based on the fact that it need a higher
- voltage to fire a leaner and/or more compressed mixture and that the
- ignition voltage drops when engine rev increases (for the conventional
- contact points ignition system).
-
- All your comments would be appreciated.
-
- Sam
-