• injector part number
• What are common issues with the 4.9?
• Dip Stick Tube
• Overheating not block or head 83 Brougham anyone know whats wrong?
• A new problem...
• What kind of spark plugs for the HT4100?
• changing spark plugs
• need some help
• 85 Fleetwood 4.1 (FWD) NO START
• 85 FWB W/ 4100 Hesitation...
• Subtle rattling noise possibly from transmission
• When do u change the O2 sensors?
• 86 Cadillac Deville Timing
• 85 eldo
• 85 FWB stalled out and won't start
• Can't seem to fond the answer.
• Source for sleeves 4.1 4.5 etc
• where does the "gas mileage" sensor collect the data?
• torx
• Why would the NOx increase after my EGR is hooked up?
• 1990 Allante Engine
• ISC motor ratchets after shutoff
• BBOB or ANYONE---A LITTLE HELP!!
• Could a catalytic convertor go bad in 2 years?
• Does the 4.9 really need 91 octane????
• 90 Deville hesitation after driving for hours
• Fuel Pump circuit problem 84 Brougham
• 93 Deville Werid Noise
• Anyone tested 4.9's fwhp?
• 4.1 Clutch Fan hooped?
• Fuel Injectors help!!!
• 91 DeVille--Problems to Watch For
• Need help with fuel system
• fuel injection parts
• Got a VSS code on my 1990 Deville!!
• SERVICE SOON light comes on random, but serviced at dealer last year.
• 91 caddy deville runs wrong
• miss on the 4.5litre?
• 4.9 liter oil use?
• Failed Smog Test Please Help!!!
• DeVille (DEVIL?) 91 *extreme* power loss.
• 90 Deville runs like crap
• My 1986 Cadi engine revs continually
• help! i think i blew it. 4.5 hg
• Transmission service
• 1990 Deville idle issue
• 4.1 Serpentine Belt Frozen
• high RPM, ISC not the problem?
• 89 deville runs rough intermittantly??
• 'hidden Warranties'
• Please Help Me!!!
• what perfomance mods,if any???
• Injector Failure At 43,000 Miles???
• new problem arising?
• 4.1 Engine seems to be running rich
• Is There Such A Thing As A Starter Motor Overheating?
• Are the GM replacemnt 4100's a better design ?
• HT 4100 flooding out badly. Warm or cold
• '90 Seville with 4.5 Knocks when warm
• Why does '90 4.5L not drop to idle till almost stopped?
• Engine STILL missing (intermittant), tons of work done so far--HELP!!!
• spark plug torque for 1991 4.9
• 4.9 straightpipes
• MAP reading while applying brake
• 4.9 Manifolds????
• 1988 4.5l fwd eats up distributor gears
• fuel system problem...i think
• Dead mouse in the heater/ AC box HELP !!!
• 89 sedan deville hesitation problem--HELP!
• VSS location?
• 4.1 engine questions
• 88 eldo codes but why
• 4.9 head gaskets fel-pro vs GM
• Should I buy it, guys?
• 1990 cadillac sedan deville
• What kind of mpg should I be getting in my 92 4.9?
• Fuel Guage problem
• Hey, can anyone help me with this 4.9?
• 4100 1990 deville
• 1st post: Eldorado dies 3 miles after I bought it...HELP!
• 4.5L replacement for 4.1 in 84 eldo/seville?
• NEED HELP -Stalled 92 Seville STS, won't start
• carb removal help urgent
• no rad fans 90 deville 4.5
• Need help quick please 4.9 deville
• 1991 SedanDeVille - "Service Engine Soon" Light
• is my engine shot????
• Oil pressure in HT4100?
• tranny jumping in and out of gears
• heres where im leaking coolant *pics
• 4.9 pushrod length/width?
• removing oil pan from 92 DeVille
• Low RPM ENgine Rough
• Exaust question
• Rebuild 4.9L thread?
• Steel Rocker Arm Supports
• Does it ever Stop!!!Tuned up and Tuned out
• 1987 Cadillac Sedan Deville
• 91 Eldorado Performance Tips
• TPS wiring Question.
• A/C Leak
• Adjusting the TPS - Right or Wrong?
• Is 104C too hot for a 4.9L 1994 Deville?
• Flowmaster Muffler Installation Pics
• intermittent miss 4.5 1990 deville
• Red Line Water Wetter ?
• GM Coolant Pellets Do Not Work....
• Coolant Fan manual override switch
• Whats up guys! I really need your help!!
• 4.9 Custom Header - Gauging Interest
• help with code please
• Went through my codes today and...(help)
• Blown Head Gaskets 4.5 or 4.9 V8
• 4.5 Cooling System Additive
• Car overheat real bad when sitting still for 15 minute
• 20w50 5W30 oil,not for use in a 4.9 liter engine?
• Do you have to change all 8 injectors on a 1992 4.9?
• Amsoil for 4.9
• How to detect a misfiring cylinder....
• start,start,no start
• What grade of fuel should I use?
• need more hp!!!!!!
• Finally have my Eldorado back w/extra hp!!
• engine code e47
• Changed Coolant Today!
• Look inside the 104k 4.9.... and a new valve cover :)
• 4100 rwd deville swap
• '89 4.5L, 200k miles, oil leak behind waterpump?
• crankcase pressure
• Converter Inlet Size??
• Vibration in 1992 4.9!?!?!?!?
• codes
• 87 Seville 4.1 smokeing, don't know why.
• 93 Deville Idle Sticking
• My buddy thought the 4.9 was like 250hp!!
• Nitrous in 4.9
• leaking deville 4100 need bandaid
• 95 Deville PO39 code need help!!!!!!!!!
• Rocker arm support installation question.
• 4.9 Custom Air intake
• What happened to my post?
• Is it hard to change the coolant on the 4.1?
• 4.5L timing?
• throttle switch short
• 4.9L '92 Knocking...or missing, help!
• 84 cadillac seville chargeing problem
• isc motor question
• Oil change and now the light wont go out.
• Performance parts for caddy 4.9 engine?
• Radiator cap PSI for 4.9
• 1990 4.5 needs new injectors
• 4.1 Biarritz hesitation and stalling - long with lots of info!
• Timing 94 Deville
• URGENT!! Muffler?
• Code 19....1984 DeVille
• rough running after warm up
• Illumina /Bbob/Nodh and other Tech types
• Finally summers here, first problem..brakes stuck
• 83 coupe air pump
• Removing cat-converter...good idea or no?
• 4.5 Performance?
• how common are coolant leaks in 4.9
• My Caddy won't start.
• Possible Seville Engine Swap
• E39 Code
• ht4100 bars leaks crap help
• Longevity of a 4.9L Is 150K too many miles?
• rumble in the 'ville
• Warmed up engine FLOWMASTER 40series DELTA FLOW clip
• Knock
• What are the common problem areas with 4.9Ls on 1994 Deville?
• 4.5L Valve Pinging / Clattering
• Stuck with a HT4100? I have the solution!
• 1985 HT 4100 Cast Iron Block & Head???
• Is single 3" exhaust too big for a 4.1L @ 200 HP?
• transmission trouble
• 85 HT4100 Swap
• Any advice on a HT4100 while I'm fixing the timing chain/gears?
• HT4100 Idle speed (warmed up)?
• 4.9 problems
• Tranny Cooler Part Numbers:92 ETC
• Engine knocking
• Oil Pressure Light just came on - 4.1 V-8!
• dumbass in need of help
• Oil leak (Bbob)
• anyone know????
• Are You Sure Rotella Is good for the 4.9?
• Removing/Reinstalling Accelerator Pedal
• Transmission lags the downshifts + sometimes upshifts after high speed drive
• 84 deville died, won't restart ht4100
• 83 coupe 4100 ( 4.1) injector problems
• Ht4100 Idle
• 4.9 water pump bolting question?
• 93 Seville radiator fan
• 89 STS torques to one side
• serpantine belt problem, 92 deville
• antifreeze in oil please help bbob and all
• Changing Engine Coolant
• Thinking about replacing the 4.9L
• Risks of Ethanol?

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