HT leads pushed out , what the hell?

[Neil79]

Oem HT Leads , brand new

Day 1

Had some really bad weather here yesterday a lot of rain, flooding and the odd rumble of thunder ended up having the car running pretty awful , the engine bay was soaked. Today i had some new plugs to put in , dried what little water was left and started her up , she fired up fine.

Took a drive down the road and it was fine until i hit 0.5bar of boost , got a lot of missfire and hesitation so i drove normaly to let it get much warmer and dry off even more. Tried 0.5 and again it was awful , i went inside to the shops came out and tried again but very slowly this time and still the same problem.

Went i got home , checked the engine bay and found 2 ht leads slighly pushed up and one pushed up so far that im supprised it was making any connection at all. I saw one of the top of the tips of the spark plug was slighty burnt white and the inside of the lead ( rubber ) was white.

Day 2

Ok this is seriously *bleep* me off now , i went out boosted it was fine boosted again it was missfiring came back home. Found number 1 was slightly out , number 2 was pushed right out and 3 was slightly out 4 was perfectly fine.

Ever since the bloody weather decided to get the car soaked through and i broke that one lead without any force. I can't keep my new leads secured in the spark plug hole. They are no different than the toyota ones


I have checked the ht lead holes and pushed a very tiny screwdriver through the hole , top of the ht lead connections. I have pushed them down on top of the spark plugs till they make the click sound.

Any ideas?

 

[oap]

Check the tightness of the plugs, air being pushed past them could push the leads out? Either that or your head-gasket gone along middle ijn-line with plug holes (unlikely i know)?

 

[ci_newman]

There has been talk (in the past) of some after-market HT leads 'popping off' because the lower seal hasn't been formed properly and the drain hole is blocked (causing an increase in pressure as they heat up) and off they pop...

Possibly something to look at!

 

[brendy]

There has been talk (in the past) of some after-market HT leads 'popping off' because the lower seal hasn't been formed properly and the drain hole is blocked (causing an increase in pressure as they heat up) and off they pop...

Possibly something to look at!

try cutting a notch up the sides of the seals this will prevent any pressure, its a known problem on some coil packs for the 20vt vag engine, maybe worth a looksie.

 

[Neil79]

Well i can't get a refund on these oem leads because i used em , ffs... But im going to return them and get another batch sent to me. This is the second batch now thats had problems in one way or another.

I tried lead 4 on the other plugs and it held them fine but the other leads wont hold the plug properly and dont make a good seal. Even when pushed down with force.

So im going to say Avoid camskill ( blueprint ) leads for the time being.

The holes are fine , the plugs are torqued correcly. Lead 4 holds the other plugs and seals correctly but the other leads dont. Ngk cold grade spark plugs.

 

[djbenjo]

Don't know what your specific car is like but, I had the same problem when my cam cover breather was blocked, kept popping the leads off and eventually spitting oil out after pushing them up.

Worth a try