Firebird V8-305 5.0L (1982)
Spark Plug: Technical Service Bulletins
Ignition - Spark Plug Application & Gap
Number 85-6(Gasoline)-11 Date 1/85
Subject:
SPARK PLUG AND GAP INFORMATION- 1981 thru 1985
The following information is being supplied to clarify any confusion about recommended spark plugs and their appropriate gaps for all Pontiac vehicles.
YEAR
ENGINE
VIN CODE
SERIES
SPARK PLUG
GAP
1981
1.6L
9
T
R42TS
.035"
2.5L
5
X
R44TSX
.060"
2.8L
X
X
R43TS
.045"
3.8L
A
A,B,F
R45TS8
.080"
4.3L
S
A,B,F
R45TSX
.060"
4.9L
W
A,F
R45TSX
.060"
4.9L Turbo
T
F
R45TSX
.060"
5.0L
Y
B
R46SX
.080"
5.0L
H
F
R45TS
.045"
1982
1.6L
C
T
R42TS
.035"
1.8L 2bbl
G
J
*R42CTS
.035"
1.8L EFI
O
J
*R44XLS
.035"
2.5L EFI
R,2
A,F,X
R44TSX
.060"
2.8L
X,1,Z
A,F,X
*R43CTS
.045"
2.8L
Z
A,F,X
R42CTS
.045"
3.8L
A
G
R45TS8
.080"
4.1L
4
G
R45TS8
.080"
5.0L 4bbl
H
F
R45TS
.045"
5.0L CFI
7
F
R45TS
.045"
1983
1.6L
C
T
*R42CTS
.035"
1.8L EFI
O
J
*R44XLS
.035"
2.0L EFI
P
J
R42CTS
.035"
2.5L EFI
R,2
A,F,X
*R44TSX
.060"
2.8L
L,X,1
A,F,X
R43CTS
.045"
2.8L H.O.
Z
X
R42CTS
.045"
3.8L
A
G
R45TS8
.080"
3.8L
9
B
R45TS
.045"
5.0L 4bbl
H
G,F,B
R45TS
.045"
5.0L CFI
S
F
R45TS
.045"
5.0L H.O.
7
F
R42CTS
.045"
YEAR
ENGINE
VIN CODE
SERIES
SPARK PLUG
GAP
1984
1.6L
C
T
R42CTS
.035"
1.8L EFI
O
J
R44XLS
.035"
1.8L Turbo
J
J
R42CXLS
.035"
2.0L EFI
P
J
R42CTS
.035"
2.5L EFI
R,2
A,F,P,X
*R43TSX
.060"
2.8L H.O.
Z,L
A,F,X
R42CTS
.045"
2.8L
X,1
A,F,X
R43CTS
.045"
3.8L
A
B,G
R45TSX
.060"
5.0L
H
B,F,G
R45TS
.045"
5.0L H.O.
G
F
R44TS
.045"
1985
1.6L
C
T
R42CTS
.035"
1.8L EFI
O
J
R44XLS
.035"
1.8L Turbo
J
J
R42CXLS
.035"
2.5L EFI
R,2,U
A,F,P
R43TSX
.060"
2.8L 2bbl
X
A
R43CTS
.045"
2.8L MFI
9,W,S
A,F,P
R42CTS
.045"
3.0L MFI
L
N
R44LTS
.040"
3.8L
A
G
R45TSX
.060"
4.3L EFI
Z
B
R43CTS
.035"
5.0L 4bbl
H
B,F,G
R45TS
.045"
5.0L H.O.
G
F
R44TS
.045"
5.0L TPI
F
F
R43CTS
.045"
