Misfire is back

Post by **GreenyUK** » Thu Jan 30, 2014 4:28 pm

I can't afford red bull I'm only working class

Post by **GreenyUK** » Fri Jan 31, 2014 9:01 pm

I still gave this misfire after the temp repair. Only when the car is warm though?

Could this be a timing issue? Maybe a tooth out or something? I've read that if your timing is not right with theses it can run like it's on 3 cylinders.
When it is misfiring it pops and bangs a lot so is over fuelling.

Getting home is now more worrying..

mercutio · Post by **mercutio** » Fri Jan 31, 2014 9:09 pm

does sound like a timing issue or maybe a bad lead/plug have you checked the plugs after it has done it?

bennyboy · Post by **bennyboy** » Fri Jan 31, 2014 9:32 pm

Was going to say the same as merc. I had this many years ago on my old cavalier, tried everything and it turned out to be a cracked ceramic on a spark, when checking the business end of them I was holding it in the socket, so overlooked it. Lesion learned for life!
Only happened under load too, would idle fine.
HTH

Post by **GreenyUK** » Fri Jan 31, 2014 9:33 pm

Spark plugs? No I haven't actually. I wasn't aware the timing could be adjusted on these there's no way to move the dissi cap, thought it was all electronically done?

Post by **GreenyUK** » Fri Jan 31, 2014 9:35 pm

Yes this only happens under load at first. And when warm. However if I've been out in it for a while and it's hot, once Parker it up it sometimes! Will miss with a rev but it's mostly under load. If I pull off real slow it seems to be ok. And some times I can rev through it by changing down etc.

bennyboy · Post by **bennyboy** » Fri Jan 31, 2014 9:39 pm

Yep, I'd be checking the sparks and HTs first. You could run the car at night lift the bonnet up and see if you've got arcing across the HTs.
Start with the simple stuff, check dizzy cap and rotor arm contacts too.
Sorry if you've already done that, haven't read the whole thread

bennyboy · Post by **bennyboy** » Fri Jan 31, 2014 9:40 pm

Also, if you have a cracked spark, it would open up when warm

Post by **GreenyUK** » Fri Jan 31, 2014 11:11 pm

bennyboy wrote:Yep, I'd be checking the sparks and HTs first. You could run the car at night lift the bonnet up and see if you've got arcing across the HTs.
Start with the simple stuff, check dizzy cap and rotor arm contacts too.
Sorry if you've already done that, haven't read the whole thread

Hey, good idea I'll do that, not tonight though as have no tools what so ever :/ so can't even remove the plug cover lol.
No need to apologise mate, I've no looked at the dizzy or rotor arm to be honest. I normally over look the simple stuff as I tend to over think and complicate things

89 UKDM BA4 4WS (resto job!) · Post by **wurlycorner** » Sat Feb 01, 2014 8:21 am

Good to have ruled out the exhaust anyway - that was starting with the simple stuff!