924Board.org

[gml]

Hey all, after replacing the fuel filter and vacuum lines my 924 NA has been starting and running sort of okay, but it idles erratically at first, and when I take it out around the block it accelerates really poorly (although it eventually idles fine). As per the previous recommendations I am going to do a fuel pressure test.

However — I recalled that I encountered oil on the spark plugs when I replaced the old ones, and realized that oil in the combustion chamber could also cause poor engine performance.

Does anyone know for the 924 what oily spark plugs usually indicate? What's the best way to diagnose/test it?
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George

1982 924 NA 5-speed

[gml]

Just in case it helps diagnose something I have photos of the spark plugs. (Numbered sequentially 1 through 4 from front bumper to rear)

1 and 3 both have a slick oily gunk on the electrode where 2 and 4 do not. All of them had a bit of oil on them.


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George

1982 924 NA 5-speed

[924RACR]

Those don't look oily enough to give me great concern; for sure we've run with plugs much dirtier and only the very slightest power loss.

So yeah, I'd focus on making sure your fuel system is fully up to snuff. Wouldn't hurt to check spray patterns too...
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Vaughan Scott
Webmeister
'79 924 #77 SCCA H Prod racecar
'82 931 Plat. Silver
#25 Hidari Firefly P2 sports prototype

[morghen]

Looks 924 normal to me
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Supercharger and EFI kits
https://www.the924.com

[gml]

That's a huge relief! Thanks both.
_________________
George

1982 924 NA 5-speed

[Paul]

In addition to great advice above, check for vacuum leaks and do a compression test.
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White 87 924S "Ghost"
Silver 98 986 3.6l 320 HP "Frank N Stein"
White 01 986 "Christine"
Polar Silver 02 996TT. "Turbo"
Owned and repaired 924s since 1977
Porsche: It's not driving, it's therapy.