changd plugs & all 4 coilpacks - stil misfirin?

[eggy790]

what else is there left for me 2 check? Why is it stil misfiring? Could it be sticky valve? I havnt got any lights come on..

 

[GazM]

HT Leads?

 

[mini-valver]

K4J uses pencil coils mate, no leads.

Is it missing from cold or only when it warms up? Used the right plugs?

 

[GazM]

ah rite, you learn something new everyday!

 

[eggy790]

it misfires all the time. Started off intermittent, bt nw its really bad when cold, its not even drivable, no power and dippin revs

When it warms up it is drivable but stil misfiring. And yes correct plugs. I also popd my old plugs bk in as i fort they may be incorect, but its stil same.

 

[eggy790]

any ideas? I used the ngk bkr6e plugs.

Bt then put the iridium plugs bk in as they seem 2 b worse mmisfire wiv new plugs bt its abtuali same..

Any ova ideas? Somebody must hav had this happen,.

 

[SBV116]

Get the compression checked, could possibly be a burnt valve!

 

[eggy790]

i hate daventry! lol i have no mechanic contacts..

i might just drive back to leeds and get my mate to check it..or can anyone recommend a garage to check compression on the car in daventry? also price?

and if its a burnt valve, is it a new engine? and can the car breakdown altogether?

i noticed when warm it doesnt idle well making parking really hard as the revs dip right down to stall but then pop back up, u just gotta give more gas when parking.

also price for a new engine?

and also is there anything i an do to check for burnt valve? it misfires more at low revs to me..

p.s. some lad at work fort i had a turbo conversion haha just incorrectly mapped..tit

 

[dunlop]

with the engine running disconnect the pencil coils one at a time and see which one doesnt make a difference. thats the one thats mis-firing, try putting an old coil on that one as a few have been dodgy from the factory.

 

[eggy790]

done that mate

1 and 4 make misfire worse

2 and 3 stall the car

so all 4 are working .. correct?

 

[Tigger]

Speak to Mikeyk18 mate, his car was doing this not long ago

 

[MikeyK18]

yea my 172 was misfiring, and after changing the coils, plugs, leads, and ecu,

it turned out the be a bit of decaying wire leading from the ecu to the coil,

after it being rewired, everything was grand

hope it helps you mate

 

[eggy790]

hi mate can you help me pin point this wire.. with pics or the like?

also how much did rewiring cost? anything i can do myself?

 

[Aluco]

Don't go back to pudsey. You will likely be "shanked"

 

[eggy790]

why will i get stabbed mate? lol

 

[eggy790]

anymore ideas? i cant find any corroded wires plus half of it is covere dup in that plastic tube cover?

 

[W111ALG]

After my coild died cause the car had intermittantly been running on 3 cylinders. After changing the coilpack it was still not right. It had killed the CAT - change dthe CAT and it was all good.

 

[Oliver_K4M]

Yes, if you drive high load and have misfire, your ceramic monolith may melt due to the high temperatures that are caused by the exotherm reaction inside the catalyst...result is a much higher back-pressure...

 

[eggy790]

mine doesnt have a cat.. been running decat for 3 years..

more worried about the engine mounts the way its shaking.

heres a lil video showing how lumpy it is , my mate at work recorded it today.

http://www.youtube.com/watch?v=pU8NElIQsV4

 

[eggy790]

Yes, if you drive high load and have misfire, your ceramic monolith may melt due to the high temperatures that are caused by the exotherm reaction inside the catalyst...result is a much higher back-pressure...

erm big words in there lol could you simpluify it please