Printable View
Hi,
I have an 1989 m20 525i that has recently started running on 5 cylinders.
I could smell fuel coming out the exhaust so i looked at the spark plugs and saw no.5 cylinder plug was wet.
I've tried swapping the ht leads over, changing the spark plugs and a new distributor cap plus rotor but its still not firing.
What else is there to look at?
Also i notice on ht lead for cylinder 6 there is a circle thing round it that goes off somewhere else. What does it do?
Thanks
If you have eliminated all the ignition parts, plug, wire,cap,rotor, then its probably time to run a compression check.
the lead is to time the batch firing forthe injection, it will run with out it connected, but not as well
ah i forgot to say i did a compression test in fear of valves but it seemed fine.
I also did a stomp test and nothing came up.
Silly question I know, but after replacing the plugs,wires,cap and rotor, are you positive the misfire is still on number 5? I have seen aftermarket caps be bad out of the box. Also, if #5 was flooded enough, it may have fouled the new plug right away, this could be especialy true if you put in crappy Botch platinums.Quote:
Originally Posted by Mr Toad
you said the compression test "seemed" fine, what where the numbers?
If all the ignition parts are good, and compression is good, maybe you have a missing injector o-ring, or even an injector that is dumping fuel.
Does she run well on high rpm?
Maybe cyl 5 gets flooded, change the injector if you can and see what happens.