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HT4100 4.1, 4.5, 4.9
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OBD I codes for 4.x Engines
DaveSmed
Sep 20, 2004
Locked
0
89K
Sep 20, 2004
by
DaveSmed
E
PCM and alternator getting hot
Eyekandy1
6 d ago
2
71
5 d ago
by
Eyekandy1
E
Allante running lean HT4100 engine 87 52000 mileage
Elegancec
7 d ago
0
72
7 d ago
by
Elegancec
L
HT4100 High Idle at startup
LuvMy83
28 d ago
1
109
24 d ago
by
smokuspollutus
Crank hub pulling
smokuspollutus
7 mo ago
2
617
2 mo ago
by
smokuspollutus
1985 4.1 AC sounds
Uga812
2 mo ago
4
271
2 mo ago
by
the APEMAN
1984 Seville engine rebuild problems
Astro409
2 mo ago
4
431
2 mo ago
by
the APEMAN
Z
4100 still running better to rebuild or replace
zac85eldo
Aug 26, 2012
5
6K
2 mo ago
by
Astro409
N
4.5 mess
Nitti
Dec 11, 2008
3
953
3 mo ago
by
TreyMcFarland
J
Replaced EGR, engine barely runs now - 1990 4.5 Fleetwood
Jfleming
4 mo ago
4
368
4 mo ago
by
Jfleming
Blower motor resistor
mossdabeast
4 mo ago
1
252
4 mo ago
by
mossdabeast
4.9 PCV grommet
joelc
4 mo ago
1
317
4 mo ago
by
Notstar
T
1990 TPS relearn procedure . . .
themind
Jan 25, 2004
3
11K
7 mo ago
by
tymeyer29
N
Fuel Pump circuit problem 84 Brougham
Netherx
May 5, 2004
6
5K
7 mo ago
by
SlideTheAddyImInMyCaddy
T
HT 4100 engine - is it that bad
thewill02
Apr 23, 2004
2
3
53
47K
8 mo ago
by
Notstar
E
high RPM, ISC not the problem?
exclusive605
Aug 4, 2005
4
1K
8 mo ago
by
goldenkeys
need vacuum fitting
donny brasco
8 mo ago
3
520
8 mo ago
by
donny brasco
J
1984 Seville 4.1 - need head bolt set
JimHef
Nov 8, 2014
3
2K
9 mo ago
by
Abedon30
4.9 Cracked Block Leaking Coolant
jadz
Mar 9, 2006
2
33
8K
10 mo ago
by
chevykid
oil drain holes in heads
Marx3
10 mo ago
3
476
10 mo ago
by
Marx3
1983 HT4100 coolant question
Marx3
10 mo ago
5
915
10 mo ago
by
Marx3
ht4100 aluminum valve covers
Marx3
10 mo ago
1
552
10 mo ago
by
jayoldschool
1984 4.1 wont start, need pointers!
Marx3
10 mo ago
16
986
10 mo ago
by
Marx3
N
4100 HT Idle speed setting
nizki1981
Oct 20, 2012
7
8K
10 mo ago
by
Christine1984
K
overheating, now power, 83 coupe deville ht4100
knepper
Jun 1, 2006
15
5K
10 mo ago
by
Christian caddy
F
HT4100 Damper Bolt
fat_pun
Oct 23, 2004
14
9K
11 mo ago
by
Submariner409
1
Life expectancy for 4.9 and 4T60E
100
Aug 14, 2006
2
3
59
21K
11 mo ago
by
ZeroOctane
M
Why does '90 4.5L not drop to idle till almost stopped?
mdogg
Jun 27, 2005
16
4K
12 mo ago
by
KenAllante91
D
thinking about getting mods on 4.5
Deville4.5
Apr 20, 2011
9
8K
Jul 4, 2021
by
Submariner409
E
1987 Deville 4.1 to 4.9 Conversion
Edahall
Aug 13, 2012
2
38
23K
Jun 30, 2021
by
Rashade1
D
1982 Coupe Deville alternator not charging.
Dp187
Jun 9, 2021
5
608
Jun 22, 2021
by
the APEMAN
1983 Eldorado 4100 fuel pump changed - no power while in gear two days later
ccbrownkc
Jun 14, 2021
3
757
Jun 22, 2021
by
ccbrownkc
84 Fleetwood Brougham 4.1l rwd coolant leak near passenger side tire
SlideTheAddyImInMyCaddy
Jun 18, 2021
0
473
Jun 18, 2021
by
SlideTheAddyImInMyCaddy
305/350 swapping
Freakyfran3
Apr 22, 2021
8
968
Jun 5, 2021
by
TONY_C
H
Carnut, got it to work, Thanks !
hendrob
Aug 16, 2008
3
1K
May 20, 2021
by
fishnazi
C
I have a code 26 on an 84 SDV
carnut
Jan 14, 2014
5
2K
May 20, 2021
by
Submariner409
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HT4100 4.1, 4.5, 4.9
This forum is to discuss the newer aluminum block Cadillac engines.
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Eyekandy1
2 Replies
L
LuvMy83
1 Reply
smokuspollutus
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