Spark plugs keep going bad
 

Every 3 months or so my i get missfiring, change the spark plugs and the problem is fix any sugestions in why the car is doing that, i see people with spark plugs for more than 3-6 months on with no problems
Thanks

how is your a/f?

is good, i might need new coils or a diff set up for the ignition, some tuning in the PFC, will see, i change the plugs today, runs great, but i know in a few weeks i will replace the plugs again "advance replace them for free with receipt"

i would normally say that ur fouling the plugs because of a rich a/f ratio,,, but not sure what else it could be

someone told me that, but how do you fix the fouling, change the injector maps, adjust the A/F ratio, replace something

well you would have to see what a/f ratio ur running, this is normally done on the dyno with a wideband. from there u will be able to see what a/f ur running. but sometimes ur car may have to run a rich a/f ratio as not to cause damage to the enigne or even ping. what did the end of the plugs look like when u removed them?
if u did want to lean it out a little then its best to have maps altered whilst on the dyno with the wideband.

Any details on your set-up?
What kinda plugs?
How much boost?
What size turbo?
How much power are you making?


-Ted

T70, 1600 SEC 550 PRI, WALB FUEL PUMP, POWER FC, FMIC, MALL EMITIONS OUT, 3" DP AND MP, APEXI N1 EXHAUST, D THROTTLE REMOVED, KOYO RAD, AL AST, FPR, PROFEC BII

I CHANGE THE PLUGS YESTERDAY AND THE CAR RUNS FINE, BUT IN A COUPLE OF MONTHS THEY WILL GO BAD, IS NOT THE FIRST TIME
THANKS IN ADVANCE EVERYONE

What do you mean by "go bad"?
Fouled?
Center electrodes gets eaten?
Discolored?


-Ted

I don't know what kind of power you're making or plugs you're running.....but I'd wrather change the plugs every couple months vs. have to lean of a A/F ratio. CJ

I agree and so far im doing that, but is strange compare to others


RETed:

I think the center electrode

post pics. what plugs are you running? stock igniton?

my MSD 6 box eats up EGV plugs rather quickly but judging by your responses your running stock style NGK's with a stock igniton. If so I'd say it was to be a super rich a/f ratio.

Who tuned your car after the single was installed?

Are you running NGK BUR's?

If the centers are degrading too fast, you can either upgrade to Iridiums (same heat range) or run colder plugs.


-Ted

Hey Ted do you have the part number for the iridium ones, thanks

Iridiums: BR9EIX and BR10EIX

They're a snowmobile application, but Advanced or AutoZone can get them in a day. Less than $6 a piece, but they require a thin walled socket that you must either buy (~$20) or machine yourself.

I have Denso Iridiums listed as...
1RE01-27#4
1RE01-31#4
1RE01-32#4
1RE01-34#4

http://fc3spro.com/TECH/MODS/IGN/plugs.htm
Bottom half of my page.
Also listed is equivalent heat ranges versus the NGK's.


-Ted