NGK 6ES 1 step colder

[dls93tsi]

I put new spark plugs in my car today, and I got the NGK 6ES, but one step colder....when I put them in, I also had reset the ecu, b/c of some problems I was having. I took the car out for a drive after idling a good 5-10 min. and it ran fine, except when I gave it gas, it would buck and miss like crazy.

After a few minits(sp) of driving, it got better and better. I did 2 logged runs, the first i was knocking at about 6 and my feul trims were at 120 high and 160 low. the second run, my knock was down at 0-1 and my feul trims were 100 across the board.

I am wondering if the bucking was the plugs, do they need higher cylinder temps to run right or was it my ecu relearning the parameters?

 

[blcknspo0ln]

changing your plugs shouldn't do much to performance..

i'm assuming you got bpr7es??? put your stocks back in and relog, and rerun.. if it's fine then it's your plugs

 

[dls93tsi]

No, they are 6's, just a step colder, not a full phase, to the 7. it runs great now, its just until the engine warmed up fully...thats why i though maybe it was the colder plugs..maybe it was just the ecu reset..

 

[AWDspoOLiN]

Did you check the gap on the plugs? This may be a reason for your bucking.

 

[dls93tsi]

.028 on all 4. I know better than to put in plugs w/out gapping them myself

 

[Cablefed]

.030 on the same plugs in my eclipse and no issues. I went with a colder plug as well.

 

[TSIfreek]

The 6s are stock heat range and the 7s are 1 heat range colder the ES means the same thing the #s are what you look at. Keep the 6s in unless you are running bigger than a b16g. The plugs just wont get hot enough to clean the carbon off them and foul up causing problems. Make sure the conection from the plug termanal to the inside of the coil is making good contact. The boot slides on the wire very easy making it look like the wire is on the coil ok.

 

[95TalonTuner]

The 6s are stock heat range and the 7s are 1 heat range colder

it only took 7 posts to come out.

bucking could be wires. could also be an ic piping leak.

 

[sonicnofadz]

The spark plugs would not cause this "bucking" unless they were completely defective. Trying swapping to other plugs and see if there is any difference. Sounds like to me you have a boost leak somewhere.

 

[ohio98eclipse]

I have the bpr7's and every stage 1 mod just about and a 14b turbo not a 16g and my car runs just fine on the "colder" plugs.

 

[blcknspo0ln]

I have the bpr7's and every stage 1 mod just about and a 14b turbo not a 16g and my car runs just fine on the "colder" plugs.

w312d h0mi3 bpr7es' with no problems here

 

[Defiant]

From what you've said, I'd guess the difference you have in plugs is that you've gotten away from the projected tip. Not a good move for street use.

NGK has no "half-steps" in heat range. 6's be 6's, etc.

 

[dls93tsi]

What is the diff. w/ a protected tip and unprotected...besides the chance of pregnancy...

 

[Soular]

What is the diff. w/ a protected tip and unprotected...besides the chance of pregnancy...

Now that's funny bro!!

But Really what is the diff? I never heard of a protected tip...

Also Let me ask this... I have a t-25 witha Greddy 24R and hard pipes with Type S and a big intake.. With this setup should I stay with Stock plugs? Thanks in Advance

 

[Defiant]

Read a bit more slowly so as to not bruise your lips.

ProJected Tip.

http://www.strappe.com/plugs.html

 

[dls93tsi]

opps, sorry defiant..i didnt read carefully enough..my bad