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compression prob?


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#1 aussie

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Posted 22 May 2007 - 09:46 AM

hey i think it might be a compression issue but to start my car is a mission, when i turn it over it sounds like the bats dead but its not. ill turn it over for 10 secs then again and the third time it sounds right and starts, by right i mean turns over fast. is it ok??
cheers,
Ian

#2 biggav

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Posted 22 May 2007 - 10:13 AM

hey i think it might be a compression issue but to start my car is a mission, when i turn it over it sounds like the bats dead but its not. ill turn it over for 10 secs then again and the third time it sounds right and starts, by right i mean turns over fast. is it ok??
cheers,
Ian


disconnect the ht lead between the coil and dizzy (with ignition off :- ) then try turning over... if it turns over fine, then you need to retard the distributor.

mine was sparking just before TDC and causing the engine to fire backwards... :) sounded like a flat battery but once it started to turn it was fine.

#3 aussie

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Posted 22 May 2007 - 01:18 PM

avin a coil change tonight ill try it cheers gav what u mean by retard the coil??

Edited by aussie, 22 May 2007 - 01:18 PM.


#4 biggav

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Posted 22 May 2007 - 01:38 PM

avin a coil change tonight ill try it cheers gav what u mean by retard the coil??


retard the distributor... if the problem is that the spark is happening too soon in the combustion process, you can take off the dizzy cap, loosen the collar thet holds the body in place, and rotate the diz by a couple of degree's (anti clockwise) and that should make the spark happen later on (after the piston has reached top dead centre... that way, ignition within the chamber will take place after tdc and assist the rotation rather than working against it...

You'll know if that is whatthe problem is by simply diconnecting the coil or taking the distrubutor cap off, if the engine spins quickly then your spark was a bit premature.

hope that makes sense.

Edited by biggav, 22 May 2007 - 01:39 PM.


#5 aussie

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Posted 22 May 2007 - 03:59 PM

clear as day, cheers mate ill let you know how i get on later.

#6 dklawson

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Posted 22 May 2007 - 04:17 PM

If it is a distributor timing issue, there's another way to address this.

The problem described above is sometimes called kick-back because the excessively advanced timing causes early combustion and the crank wants to turn the wrong way (backwards). I have a friend in Australia who runs the timing WAY advanced on his Mini to get the maximum power out of it. He placed a toggle switch in series with the power wire going to coil (+). He turns the car over on the starter and when the engine is turning over well, he flips the toggle switch to bring the coil to life. My fried didn't come up with this on his own, it's a method that's been used for quite a while. However, my Ozzie friend is the only Mini owner I know of who's resorted to this "fix".

#7 aussie

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Posted 22 May 2007 - 04:26 PM

just dunno its quite tuned and everything like to be running fast it hates to idle and go slowley lol. dnt want to resort to that kind of thing. if alls still pooped i think its the rr for dave

#8 biggav

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Posted 22 May 2007 - 04:40 PM

If it is a distributor timing issue, there's another way to address this.

The problem described above is sometimes called kick-back because the excessively advanced timing causes early combustion and the crank wants to turn the wrong way (backwards). I have a friend in Australia who runs the timing WAY advanced on his Mini to get the maximum power out of it. He placed a toggle switch in series with the power wire going to coil (+). He turns the car over on the starter and when the engine is turning over well, he flips the toggle switch to bring the coil to life. My fried didn't come up with this on his own, it's a method that's been used for quite a while. However, my Ozzie friend is the only Mini owner I know of who's resorted to this "fix".


and you get a free immobiliser at the same time!!!!!!!!!

#9 dklawson

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Posted 22 May 2007 - 07:54 PM

"and you get a free immobiliser at the same time!!!!!!!!!"

I hadn't even considered that !

#10 blacktulip

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Posted 22 May 2007 - 08:22 PM

this has helped to answer a problem of my own, thanks guys!!

#11 aussie

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Posted 22 May 2007 - 10:00 PM

we had to advance it! its so fast now! so much of a dif. and i found out my lumination was not held in place in my distributer so that was prob not helping..... amazing what a difference haha. thanks for the help guys!

#12 biggav

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Posted 22 May 2007 - 10:28 PM

wicked!!! :thumbsup:




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