Friday, Feb 08, 2013 at 19:53
How do you know it is the 5th cylinder?
When starting from cold you can quickly touch each exhaust branch of the exhaust immediately after startup. If one is cylinder is poorly then it will remain colder for longer than the others.
The injector pulse is an electrical thing and it may be the wiring to one of the injectors has flopped around with normal use and broken one of the two wires which goes to an injector. You will know which one cos of the cool feel described above. Look for sagging loom wires going to the injectors, may need to be supported.
This fracturing of wires has happened to some BT50's so not totally uncommon.
It is possible to
test the pulses to an injector with
test equipment.
An injector can block or fail and not deliver fuel to the cylinder, this isn't very common but can happen.
Anyone who can identify 5th cylinder is poorly, should also, at the same time, be able to identify the actual fault. Maybe one of the above.
If you suspect a particular injector it can be taken to a fuel injection service centre and they can
test it for you.
If you really think it is the injector, a wrecker may be able to sell you one from a Mazda V6 engine do do the same job. Just change it over and see if it improves. may be the cheapest way of fixing it.
Ross M
FollowupID:
781118