New Spark plugs fitted. slight hesitation

[brettu26]

well i fitted new plugs the other week while i had the alternator out etc.

the old ones were pretty knackered & burnt up. so i went to a colder plug BP7ES's
have also removed the air canister at same time, i run new magnecore leads too, but seem to now have a slight hesitation once it gets warm intermittantly.

so i've changed a few things at once and not sure what it might be? the new plugs have been in 3wks and look like this. normal? right plug?

ta Brett

 

[Entaran]

What boost level?

Put in 6's if you're running less than 20psi. 7's will always stutter under light load.

 

[brettu26]

Well i've got a manual boost tap in there and its cranking 12-14psi i guess under full load.

swapped out as the old ones looked badly cooked; i guess they could've just been really old huh.

thanks for the tip

 

[nate108]

http://www.ngkspark.com.au/sparkplug_tech.php#

 

[brettu26]

Your Vehicle:
1990 - 1993 Mitsubishi Galant 2.0L HH, VR4, Turbo 4G63

Spark Plug Part No. Plug Gap
Recommended Plug BP6ES-11 1.1
BPR6EIX-11

yup thats what i thought, but went a step colder as they looked shagged lol
maybe i'll go back to the stocko ones

 

[SIVART]

I got these and there great

BPR6EIX-11

I think 6's are better with the vr4 , but my evo runs 7's standard

 

[Entaran]

gap for vr4's is 0.8mm ngk is wrong. nonturbos are 1.1

 

[bazeng]

Lorry is right.

Ignore that -11 on our plugs.
We should have a .6 to .8 gap with our engines.
1.1mm gap is way too big and will miss fire at higher boost levels.

 

[brettu26]

I gapped them per my owners manual @ 0.8 anyway, so all good

cant justify the cost of iridiums just yet Travis.

 

[rob323]

I ran BPR7ES plugs in my VR4 for years and even with light load and stock boost, never had any problems with them.

 

[trist]

that injectors are you using

 

[SIVART]

I think there worth it , the car feels alot more responsive, better on fuel, smoother through the rev range

I use to run 7's in my C73A (E39A 4G63T) which worked well, but I tried denso iriduims and they felt alot cleaner allround plug. so I just go for them now, NGK are better also, Denson are just way to expensive