any spark plug guru's

Heads, valves, pistons, rods, crankshaft, etc...

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lucas
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any spark plug guru's

Post by lucas »

changed my plugs and wires today also did the paranoid fab grounding kit, still having idle issues when the brake is depressed or the headlights are on, worse when combined.

Anyway just wanted to post some pics of the spark plugs, one was getting blow by

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1993 legacy ss "Shela"
kimokalihi
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Re: any spark plug guru's

Post by kimokalihi »

Maybe your fuel pump is not working very well or the filter is clogged or lines are dirty or injectors are clogged.
98 Metro Hatch Daily Driver :)
91 SS EJ20G Engine/Tranny/Diff Swap Build Thread Here
"Your testes are close to your bottom but you still play with them all the time." Jeremy Clarkson
lucas
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Re: any spark plug guru's

Post by lucas »

new fuel filter, walbro was put in maybe 2 years ago? how long do those things last anyway
1993 legacy ss "Shela"
Shaggy
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Re: any spark plug guru's

Post by Shaggy »

U should use the copper ones instead of platinum. Copper conducts more electricty. It would be different if u had a hotrod engine or sumthin that was hotter and would just melt the copper ones. I noticed a considerable difference in my engine running between the copper and platinum plugs.
90 2.2 N/A legacy awd wagon with outback struts.
kimokalihi
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Re: any spark plug guru's

Post by kimokalihi »

Yeah everyone uses the copper NGKs. Just stock spec NGKs. Gapped .039-.043.
98 Metro Hatch Daily Driver :)
91 SS EJ20G Engine/Tranny/Diff Swap Build Thread Here
"Your testes are close to your bottom but you still play with them all the time." Jeremy Clarkson
lucas
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Re: any spark plug guru's

Post by lucas »

by the copper ngk's you mean the "V" groove ones? tried those and the car didnt like em
1993 legacy ss "Shela"
Baddog
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Re: any spark plug guru's

Post by Baddog »

Yeah I ran coppers for awhile. Got some mis-fires. Swapped to plat's in my 96 Legacy. No issues. Guess it varys from person to person and car to car.

If you're having a rough idle maybe the Idle Air Control Valve is the culprit?
1996 Subaru Legacy L
1993 Subaru Legacy SS
1992 Subaru Legacy L
1990 Subaru Legacy L
jefferson
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Re: any spark plug guru's

Post by jefferson »

Kind of sounds like an alternator issue to me. I have read alot about a bad alternator causing issues with idling and other stuff.
91 Black SS 5spd. Edm lights, wrx gauges in dash, 45 degree airbox, cryoed drilled and slotted brakes. Invidia divorced downpipe with custom stainless exhaust. To be installed, aluminum a-arms, manual belts, awic.
ZUBB92
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Re: any spark plug guru's

Post by ZUBB92 »

I USED BOSCH +2, GREAT PLUGS....RUNS A LOT BETTER......
lucas
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Re: any spark plug guru's

Post by lucas »

I have had the alternator checked and they said it was ok, i think its probably the IAC or the fact that the timing belt is old and needs to be changed. But it seems like Im still grounding out somewhere like when i push the brake or turn the headlights on something is drawing power and makes the motor bog down. Just installed a grounding kit too.
1993 legacy ss "Shela"
93forestpearl
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Re: any spark plug guru's

Post by 93forestpearl »

The pics are not high enough resolution to see the wear on the plugs.



If you are having issues when depressing the brake pedal, plugs are not your issue. Look elsewhere.
→Dan

piddster34 at h0tma1l d0t c0m
lucas
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Re: any spark plug guru's

Post by lucas »

^ yep already figured that out, was time to change them anyway. Im leaning towards a short somewhere
1993 legacy ss "Shela"
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