ok so took my car out to the local shops and on way back engine starts making a noise and it aint picking up much at all.... i cud of just walked home faster...

opened up only to find that number 3 and 4 cylinders arent firing or working watever u wanna cal it.. ive checked the leads, (new ones bought about 2 - 3 months ago)
even checked the plugs, 1 and 2 cylinder plugs are a nice and dry while the other 2 are jus wet all the time where they not been firing,
the plugs work tho cos i swaped them over and i knw im gettin a spark so why aint they working???

is this an early sign of head gasket or somethin worse??

Coil pack/s? If all the ignition is ok and you must have fuel for the other 2 cylinders might be worth a compression check.

wat will a compression test show me.. ??

am4n said:

wat will a compression test show me.. ??

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Whether or not you have compression on cylinders 2 & 3. If not it could be valve, piston ring or cylinder bore trouble. If you do have compression & all clinders are reasonably the same I am struggling...

hmmm means im gonna have to get messy... thanks for ur help...

I had exactly the same issue and it turned out to be the HT leads. I would try that first as they are fairly inexpensive. If not the HT's i would suspect the ignition unit.

tchuey69 said:

I had exactly the same issue and it turned out to be the HT leads. I would try that first as they are fairly inexpensive. If not the HT's i would suspect the ignition unit.

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Errrm... hello...? from the first Post. It does pay to read the whole thing not just dive in at the end IMO
"ive checked the leads, (new ones bought about 2 - 3 months ago)
even checked the plugs, 1 and 2 cylinder plugs are a nice and dry while the other 2 are jus wet all the time where they not been firing,
the plugs work tho cos i swaped them over and i knw im gettin a spark so why aint they working??? "

am4n said:

number 3 and 4 cylinders arent firing

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3&4 are a coiled pair, so coil pack is most likely.

but im getting a spark... jus about to do a compression test... anybody knw wat the compression value should be?? i'll put my results up in a lil while

am4n said:

but im getting a spark... jus about to do a compression test... anybody knw wat the compression value should be?? i'll put my results up in a lil while

Click to expand...

Jugs the man for that info TBH

jug said:

3&4 are a coiled pair, so coil pack is most likely.

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I was onto the case with that one Jug (Post 2)

ok so bought a compression tester but it dnt fit.. just my luck... so im going with jugs advice and taken off the coil pack cos thats the only thing i can do for the time being... how can i check if the coil is not working... the only resistance readings i manage to get are off 1 and 4 and 2 and 3... the value is 13.8 and 13.6.... is this right??

will a coil pack of another brava work, dnt think the scrappy got a 1.2 iirc from last time i paid him a visit

am4n said:

opened up only to find that number 3 and 4 cylinders arent firing

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am4n said:

but im getting a spark

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your conflicting information is confusing this issue.

first things first; you need to decide if you have a spark on 3 & 4.

if you do not have a spark then coil pack is most likely, although your test shows good results on both coils. try testing it on the 3 pins where the connector goes. the centre pin is used in both tests.

if you do have a spark then we need to look at the compression. most compression testers dont fit the 1.2. if you wrap some insulating tape around the end of it, you can hold it tightly in place against the head and it works fine. i always do it like than on a 1.2. i think you should get 100-120psi, but even results on all 4 are the main thing.

yeh got spark but the plugs are wet (smell of fuel) when i take them out
thought it might be injectors so changed them and still nothing.

cud it be anythin to do with the sensors, timing sensor and crank sensor... was havin a word wid my mechanic said it cud be them, gonna take it over to his to get compression check done and then see wat else he can do....

hopefully he sorts it cos i need my car... anywayz i'll get back later....

i would get a compression test done, then you will know for sure, its possible the HG has gone or is failing between cylinders 3-4, if this is the case you wouldn't get oil in water or water in oil, just low compression

HANG ON!!

i've just realsied what is happening here. you're getting us all a bit confused.

when you say you have sparks, you mean swapping the plug over to another lead means the plug then sparks. you can't do that, you need to determine if a single working plug sparks on ALL 4 LEADS. try each lead and see. if lead for 3 and 4 means no spark then we have coil pack failure.

i gave up and dropped it off to mechanic...

lemme jus clear up wat i did tho....

changed injectors on 3 and 4 (from scrappy)
changed all 4 plugs (new)
changed coil (from scrappy)
nearly new leads so didnt do anything to them, jus put old ones back on to check if it made diff

didnt do
compression check, cudnt get it to fit so returned it
engine diagnostic check


anyway thanks for ur replies and help.... hopefully he fixes it or there'll be spare parts on ebay soon...lol

arghhhh... he gave me the car back and said he aint got time to fix... dnt blame him tho cos i wasnt gonna pay him.. lol...

wat he did say was that there is low compression on 3 and 4 so now i dunno wat i need to do..

how can i check the timing visually without removing stuff? in case its jumped a tooth
is it easy to take head off without special tools? i think ive seen this posted somewhere on here, gonna check in a bit
wat if the head gasket is ok? wats the next thing to check...

am4n said:

arghhhh... he gave me the car back and said he aint got time to fix... dnt blame him tho cos i wasnt gonna pay him.. lol...

wat he did say was that there is low compression on 3 and 4 so now i dunno wat i need to do..

how can i check the timing visually without removing stuff? in case its jumped a tooth
is it easy to take head off without special tools? i think ive seen this posted somewhere on here, gonna check in a bit
wat if the head gasket is ok? wats the next thing to check...

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When the head is off check it where the blow is with a straight edge and feeler gauge, any gap will mean a skim and rebuild. If the head / gasket are OK next stop is valve seating, although as it 2 adjacent cylinders HG / Head is favourite IMO

ok cool.... i'll see if i can get the head off tomorrow afternoon... thanks