Plug Reading
Plug Reading What would this plug indicate to you guys?
The plugs were brand new gapped .29 TR6's with approx 70 miles on them. Its a Whiteish coating (very thin) with a blackened base ring. The whiteish coating scrapes off with a finger nail.
The car runs great in vacuum up until 0 vac or boost then stumbles badly.
The tuner (nicD) said everything looks great on the tune and AFR's are good. No codes.
I'll give more details after I finish the compression and leakdown test in a few.
The plugs were brand new gapped .29 TR6's with approx 70 miles on them. Its a Whiteish coating (very thin) with a blackened base ring. The whiteish coating scrapes off with a finger nail.
The car runs great in vacuum up until 0 vac or boost then stumbles badly.
The tuner (nicD) said everything looks great on the tune and AFR's are good. No codes.
I'll give more details after I finish the compression and leakdown test in a few.
Last edited by rx_treme; Nov 23, 2008 at 02:31 PM.
Just got finished with the compression test and leak down.
1-185 2-180
3-185 4-170
5-170 6-180
7-195 8-170
All cylinders less than 5% leak down. although i can still smell the oil smell being pushed up through the breathers on the leakdown test. I can also kinda hear it coming from breathers.
Any ideas?
Anyone else have this problem when going into boost?
I only have two things left to try. A new Map sensor and a fuel pressure gauge to read while driving.
1-185 2-180
3-185 4-170
5-170 6-180
7-195 8-170
All cylinders less than 5% leak down. although i can still smell the oil smell being pushed up through the breathers on the leakdown test. I can also kinda hear it coming from breathers.
Any ideas?
Anyone else have this problem when going into boost?
I only have two things left to try. A new Map sensor and a fuel pressure gauge to read while driving.
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TECH Apprentice
Joined: Mar 2006
Posts: 361
Likes: 1
From: australia
you cannot read a gas plug by just looking at it...
methanol yes, gas no
the thread has to be cut off, and the fuel ring looked at , right down the bottom of the white porcilin.
or
an eye piece , magnifing glass used to look down inside the threaded section
the only thing read on gas plug is the timing mark on the electrode.
ash
methanol yes, gas no
the thread has to be cut off, and the fuel ring looked at , right down the bottom of the white porcilin.
or
an eye piece , magnifing glass used to look down inside the threaded section
the only thing read on gas plug is the timing mark on the electrode.
ash
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