What do these spark plugs tell you?
12-24-2006, 05:40 PM
#1
Member
Thread Starter
Join Date: Mar 2006
Location: Portland, Or
Posts: 140
Received 0 Likes
on
0 Posts
Car: 90 Chev Suburban 4x4, 5.3L, th400
Engine: 2002 5.3 Vortec swapped in.
Transmission: Stock th400
Axle/Gears: 10blt front/ 14bltSF rear 3.73 gears.
What do these spark plugs tell you?
I thinkk they tell me that i got one of my two injectors headed south. The way they are laied out is the way they came out of the motor from front to back...
12-24-2006, 05:43 PM
#3
Supreme Member
iTrader: (2)
Join Date: Dec 2006
Location: Hou. TX
Posts: 5,538
Likes: 0
Received 0 Likes
on
0 Posts
Car: 86 TA, 91 B4C
Engine: 5.3, 4.8
Transmission: 4L80 4000, T56
Axle/Gears: 4.30 M12, 23.42 10 bolt
It looks like 4 of 8 have rich condition and your rings are weak, the other four look old.
12-24-2006, 10:14 PM
#5
Member
Thread Starter
Join Date: Mar 2006
Location: Portland, Or
Posts: 140
Received 0 Likes
on
0 Posts
Car: 90 Chev Suburban 4x4, 5.3L, th400
Engine: 2002 5.3 Vortec swapped in.
Transmission: Stock th400
Axle/Gears: 10blt front/ 14bltSF rear 3.73 gears.
i have about 50 miles on the motor and plugs
12-24-2006, 11:03 PM
#7
Supreme Member
iTrader: (1)
Join Date: Jul 2004
Location: Calgary, AB, Canada
Posts: 10,763
Likes: 0
Received 4 Likes
on
4 Posts
Car: 1982 Trans-Am
Engine: 355 w/ ported 416s
Transmission: T10, hurst shifter
Axle/Gears: 10 bolt, true-trac, 3.73
Those are the plugs you put in the car to fire up the new motor? I wouldn't even bother trying to read those, breaking in the motor will give all sorts of weird plugs as things seat. Unless you see something drastic ( I don't ) I wouldn't lose sleep over it. Drive the ***** off it and seat the rings etc.
I'd just read them after a few hundred miles
I'd just read them after a few hundred miles
Thread
Thread Starter
Forum
Replies
Last Post
89 formula TPI
Tech / General Engine
10
09-07-2015 11:06 AM