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Spark plugs keep going bad

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Old 04-26-06 | 02:53 PM
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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
Old 04-26-06 | 08:11 PM
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how is your a/f?
Old 04-26-06 | 09:08 PM
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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"
Old 04-27-06 | 04:36 AM
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i would normally say that ur fouling the plugs because of a rich a/f ratio,,, but not sure what else it could be
Old 04-27-06 | 05:31 AM
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From: Va
Originally Posted by OWHAT
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
Old 04-27-06 | 06:17 AM
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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.
Old 04-27-06 | 07:31 AM
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Any details on your set-up?
What kinda plugs?
How much boost?
What size turbo?
How much power are you making?


-Ted
Old 04-27-06 | 07:19 PM
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From: Va
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

Last edited by FJDRX7; 04-27-06 at 07:22 PM.
Old 04-28-06 | 04:56 AM
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What do you mean by "go bad"?
Fouled?
Center electrodes gets eaten?
Discolored?


-Ted
Old 04-28-06 | 05:36 PM
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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
Old 04-28-06 | 09:59 PM
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From: Va
Originally Posted by pp13bnos
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
Old 05-02-06 | 03:14 AM
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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?
Old 05-02-06 | 06:26 AM
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Originally Posted by FJDRX7
I think the center electrode
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
Old 05-03-06 | 07:57 PM
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From: Va
Originally Posted by RETed
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
Old 05-04-06 | 12:17 AM
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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.

Last edited by 4CN Air; 05-04-06 at 12:42 AM.
Old 05-04-06 | 06:33 AM
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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
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