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Theres Something Not Quite Right Here


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Car started only running on 3 , tracked it down to a missfire on #2

When I removed the plug (that only had done about 200 miles) this is what I found

Picture.jpg

Replaced it with a new plug and still no joy, so engine will need to be removed for further investigation :(

Graeme

Edited by G.Mac
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Do a compression check first.

Yes that tip will have gone somewhere and yes it could have damaged a lot of things on it's travels but it may have made it's way out without doing anything. If compression is fine I'd replace the plug and try another coil pack. If it runs ok then the next thing you need to do if figure out what happened.

Do you have a knocklink, wideband, egt gauge to help diagnose it?

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Yea, We checked each coilpack and plug to ensure a spark and even swapped the two known good ones from cylinders 1 & 3 over to 2 & 4 and still no joy. Oil pressure is still over 6 bar at idle (closer to 7 when cold) and no smoke from the back end. I am getting a little oil vapour from the breathers though when the car revs which i dont remember happening before. Apart from running on 3 cylinders there is no clunking or other strange noises.

Im off up to machine Mart to get a compression tester as they are only about 40 quid

Graeme

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NGK PFR7B bought off a guy from Northern Ireland on Ebay. plugs only fitted for 200ish miles.

dont know if it is all down to the plugs or not till I burst the engine open to see what damage there is.

ps you still have the first refusal on my APS kit if you wish....lol

Graeme

Edited by G.Mac
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Machine Mart didnt have any compression testers left so I got one from Halfrauds.

numbers 1, 3 and 4 all showed 115psi and guess what no 2 showed 20psi

does anyone know if you can get the head off without lifting out the engine?

Graeme

Firstly not good news to hear G, onwards and upwards I suppose.

115psi seems a tad low too does it not? I thought standard brand new was around 165psi. You'd expect to lose a little compression but thats almost 33% less...or is this quite normal?

Rich

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As far as i'm concerned I still dont know what my exact compression figures are as I dont trust my £18.99 Halfrauds gauge and am only using it as a comparison over the 4 cylinders, but you never know it might be correct!

looking forward to Sunday! (sort of)

Graeme

Edited by G.Mac
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