• 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?
• 94 Deville 4.9L ...P030 and some other codes....
• the return of E48/E49
• 1992 Cadillac Sedan DeVille O2 Sensors
• PO41 No Cam reference Signal - broke down on trip
• replaced water pump/wont start
• 88 eldorado 4.5 help please
• Are these holes in the airfilter housing supposed to have something... '84 HT4100 TBI
• 90 Eldo w/4.5 PROJECT CAR - Advice Desired
• fuel injector question
• It's the smog pump
• 4.1 compression
• Best oil filter?
• Brake cleaner - does it miff the engine gaskets?
• New to the forum....
• Gas milage back, more power, more smooth..
• Who sells a good CA legal catalytic conv. ?? - We have very strict Smog tests here.
• What's the most universal oil filter wrench you have used?
• Why doesn't an '84 DeVille F'ING show up on most of the online catalogs?
• New Deville Clips
• 1992 sedan deville head gaskets?
• No More Poop On Coupe ! Yea !
• How do you Remove&Clean Throttle Body, engines too big to see back there.
• Slow Battery Drain
• CAN you change oil filter withOUT draining oil pan?
• 4.5 intake gasket
• 92 Deville Starter heat shied
• 91' deville
• torque convertors for teh 4t60
• Is the exhaust layout identical per the 1983 and 1984 DeVille 4.1 V8
• time for a tune up.. whats involved.
• 88 eldo 4.5 running temp and code E027 ?'s
• Aftermarket Cat
• Best way to clean my throttle body?
• 4.5 liter misfiring on acceleration, rough idle
• 90 deville water pump?
• Newbie needs help with 87 seville 4.1L
• HT4100 EGR schematics needed to figure out smog issue, BAD F'ING NEWS
• Engine Idle and "almost" stalling problems
• Dangers of flsuhing HT4100 with motor Flush and Supertech oil.
• Change of Plans! I'm not supercharging anything...
• 84 Eldorado 4.1 V8 (HT4100) "E" engine, M57 tranny, Noise from lower end
• BARO on 4.9?
• ISC Motor &TPS/E30 code
• Oil leak
• 84 SDV RWD 4.1 Intake gasket
• injector duty cycle
• 4.1 wiring from distributor to plugs HELP ASAP
• 4.9 oil pump in 4.5?
• Fuel pressure
• 1990 4.5l air system problem
• Can A 4.1 Trans be Used in a Long?...
• does ECU prevent engine braking
• HELP!! 91 Eldo stalling problem
• coolant temperature
• Bad ECU?(BBOB)
• remove power steering pulley
• Starts hard when it gets hot
• How much booooooooost PSI can these 4.1's take? What gives in under pressure?
• GM Reliability Testing?
• Fuel Injector Replacement
• And Yet Another ISC Motor Question
• More 4.9 Stall Problems!
• Starter Removal
• used E C M ... from junk yard
• 1990 Deville won't start HELP
• Took a Vid in my 91 Deville
• WHAT THE **** IS EVERYONE's FAVORITE MUFFLER/CAT Pipe SETUP?
• Best way to flush system (84 HT4100 SDV)
• Engine Oil Questions - Bboby
• What The Hell Is That Thing!?!?!?!
• Cleaning and tune up junk on an 88 4.5L deville
• 85 Eldorado 4.1 help!!
• What kind of Exhaust systems do the 84 SDV 4.1Liter motors like to breath through?
• Knocking in the 4.9
• Oxygen Sensor Broke?
• Whats The AVG MPG Readout for this forum
• Car has no spark
• 94 deville questions
• Info on GM Goodwrench replacement engine, HT4100
• Which models come with the 4.9 V8?
• idle rpm
• 4100 D F I injector problems... looking for solutions
• HT 4100 Replacement Source?
• plug wires??
• catalytic converter
• What water??
• 4.9 codes
• problem while coasting
• throwing my belt off
• Rough Idle, 87 4.1 Eldorado
• Finally. . .Solved Intake Backfire
• 90 Deville code help
• Rough running 92 Eldo
• Ht4100 Backfires Out Of Fuel Injection
• 93 Sedan 4.9 F32, archives no help
• 93 Deville Experts Please e26 239 e47 e97 e98 f32 stalls
• Engine Idles 10 Seconds AFTER Ignition Shut-Off!!
• what kinda maintenance should i do
• Bbob...Whats the difference!?!
• Grounds Anyone?
• Weird 4.9 noise (not in archives)
• '85 Deville running rich
• Check Fuel Pump Amps draw ? Bob ?
• Oil Overfill Cause Engine Damage?
• Getting a Attitude Again-missing
• Oil Filter Capacity?
• Rpm/idle Problems
• looking for opinions on best oil/synthetic to use in a 4.1
• Where on the Web can I Find AC Delco Spark Plugs Cheap
• Oil drain plug stuck on 4.5!
• What is most likely source of oil leak?
• type of oil
• Fastest 4.9 Ever?
• I Don't Even Know Where To Start
• Rotella coolant.
• good compression
• 4.5L Idle Problem Solved!! Thanks, bbob
• Change spark PLugs
• Air Management System Problem
• Porting on HT4100's
• Changed Oil Pan Gasket, Still Leaking (4.1)
• Cam sensor replacement?
• Timing Questions...
• i want to make sure

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