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VS Bad misfire...

tavrin

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Hey guys,

my L67 had developed a minor misfire at idle this morning...
I was running NGK TR6 plugs with the stock gap (1.5 I think) and figured it might be a bit too large; so I bought BPR7EFS-15 and gapped them to 1.3.. Now the engine massively misfires under load...

I'm thinking one of my coil packs are probably dead (re-used what came with the motor when I bought it)... Any thoughts?

Cheers.
 

tavrin

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Yeah I might put the TR6's back in with 1.5mm gap after work and see how it goes
 

pendles

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look up the correct plug first. using wrong plug can be bad in the long run.
replace plugs and aee what happens.
 

tavrin

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The TR7's were too cold by the looks of things...

I pulled the gap back on the TR6's to 1.0mm. Runs like a dream :D
I think the TR6's were gapped to about 0.85 out of the box which compromised idle quality...
 

BlackVXGTS

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Why are you using those plugs? The NGK plugs recommended for your car are BPR6EFS-15 (standard) and BPR6EFIX-15 (Iridium). Did you get them for free?
 

tavrin

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Why are you using those plugs? The NGK plugs recommended for your car are BPR6EFS-15 (standard) and BPR6EFIX-15 (Iridium). Did you get them for free?
Yeah had a set sitting around
 

IBLOWN

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7's are no good. Too cold. 1 heat range makes a big difference. It will miss like a bitch.

Put the stock plugs in. Plugs are plugs.

Also im fairly sure the S/C V6 runs 1.3mm gap. BPR6EFS-13
 

Brett_jjj

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Iblown is right. The workshop manual says super 6 uses NGK BPR6EFS-13 . Standard ecotec uses NGK BPR6EFS-15. The 13 and the 15 on the end of the plug prefix shows the factory gap setting. Super 6 uses a 1.3mm plug gap.
 
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