• isc/driveability
• 91 Deville 4.9 misses when hot outside
• Electrical problem + codes
• 94 Deville, odd noise and stalling now. Pics attached.
• 1993 Seville w/ 4.9L P041 Code
• Recommended Spark Plugs
• HT4900 (4.9) Exhaust Manifold Interchangeability
• bad coolant leak: deville 4.5
• Do your own oil changes.
• 91 4.9 Runs Rich and Gas Mileage Question
• hesitation and backfire 4100
• Coolant Leak
• 90 Coupe Deville engine problems
• Brake booster question
• Hey Guys, Long time no chat, and need some input on a non input vss signal. Blew.....
• OLDS 350 swap
• 1984 eldo some new problems
• 4100 transmission
• ECM says my MAT sensor is bad.
• Coolant System
• Changing Oil To Synthetic?
• Reduced EGR flow - Detonation
• Now im getting worried!
• Adjusting the timing
• problem solved
• Post your average MPG
• Rwd/fwd Ht4100
• 4.9 performance
• Poor mpg on 93 sedandeville
• Still having problems on 93 sedandeville
• Power steering fluid replacement on 4.9
• First Car, 4.9 Eldorado. Performance Upgrades HELP? (car-noob)
• 4.1 codes
• Deisel noise around 2000 rpm's
• 4100 Flowmaster 80 series VIDEOS
• PCM codes
• 4.5 L tranny bolt pattern
• 4.9 Extremely rough running issue
• Northstar low oil pressure alarm
• Cold Air Intake?
• Hit my Horn and killed the engine
• Ping Ping Go Away!!!
• Where to get Exhaust Manifold Studs
• 1984 Throttle body need help, please.
• engine ping,
• 1985 Seville 4100
• F48
• Cleaning the throttle body plates!
• Running fuel injector cleaner through your gas tank
• Squeeking Noise!
• Performance transmission rebuild...
• Why is my caddy over heating ?
• '92 Eldo Problems
• Noise from Dash area? ? 92 Deville
• 15W40 delco with GM oil supplement
• isc motor re-learn
• overheating, now power, 83 coupe deville ht4100
• TRANS ID'ing
• 4.9 Cylinder head removal questions
• Are Head Bolts T.t.y Or Not (conflicting Answers)???????
• Stripped Head Bolt Hole Where Do I Get Helicoil?
• 1984 Cadillac - 4100 firing order and distributor rotation
• Amsoil test results
• ecm replacement
• 89 deville stumble/miss on acceleration
• E39 Vcc
• Whats the brown stuff on my valves?
• Doing My 4.9 Head Gasket Looking for Advice on Parts
• MYSTERY 94'deville water pump
• Is my EGR valave toast?
• mmmm Swisschesse.......ed the airbox :).
• Bad Map on 91 Deville?
• What do i coat the head bolts with?
• Recommended sealant for water pump gasket on 91 deville
• '90 DeVille has high NOX at low speed, failed smog. Some help needed.
• Iron heads
• Engine RPM.... is this normal?
• Got rusty tubes?
• 92 STS Engine Trouble
• ??? ???E30 isc code??? ???
• exhaust ideas
• What is this?????
• Diagnostic Mode
• 1990 fleetwood won't run right - help
• EGR Valve Location
• Cooling fan fault
• Digital Fuel Injection vs Crossfire Injection
• High Idle. ISC? Need Advice!!!!
• 91 Eldorado No Crank B334 code system problem
• 5 liter fuel injectors in a 4.9 project!
• Cleaning under hood - recommendations?
• Curious Fuel Pump Behavior
• E67!!!!!! how do i fix
• head gasket, intake gasket or what?
• Powersteering Fluid
• broke water pump on my 88!
• Help with the codes please!!
• Trans Problem?
• Question on use of Rotella 15W-40
• ? acceptable ohm resistance for injectors
• engine ping
• 3/8"-ish metal line off of throttle body runs where... ..?
• Newbie 4100 owner advice
• Rust in my cooling system, PLEASE HELP!
• I need a quick answer
• It WON'T slow down...
• 1990 sedan deville isc crap =(
• Camshaft position sensor
• Cylinder Pressure Test Question???????
• just died
• Where is the control valve assembly for the transmission??
• ISC Motor question
• real cold air intake(no short ram)4.9
• 82 HT4100 Hearse Fuel System Codes
• 4.9 performance exhaust
• 1990 Sedan Deville - Any Help is Appreciated
• 1989 Eldorado Biarritz MPG
• Little help with throttle issue...
• Ethanol in your Caddy....?!
• Any Ideas? 93 Deville Stalling
• Spark plugs and spark knock
• Engine Miss...driving me mad...
• GM Top Engine Cleaner
• What's wrong with the tranny?
• Does the ISC motor affect the tranny shifting/downshifting???
• Changing Thermostat on 88 Coupe Deville
• Changing Water Pump on 95 Deville
• A/C Compressor Only Works at High RPM?
• Strange COOLANT SENSOR readings--And engine cuts out while driving!!!
• Throttle Body 1984 HT4100
• I bought another HT4100 - a hearse
• hesitation,back fire and bad Idle 4.9
• E62 Cruise control vacum solenoid error code
• They see me coming OR So they think
• Swapping 4.9 to 4.6N*
• Any Neat Tricks Replacing Lh Head Gasket???
• Coolant temp gets up around 230 some times
• They see me coming OR So they think
• 4.9 exploding mufflers
• Who's 4100 sounds like this?
• Its not the fuel pump.
• Northstar engine builders in So Cal?
• How often do you have to calibrate your TPS?
• 4100 coolant loss #3 cylinder
• will 4.5L heads bolt up to a 4.1L
• Compression ratios?
• HT4100 flooding out badly. Code 15,20,52 ?
• exhaust leak
• 4.9L What the Hell is this? ...
• Toasted fuel pump?
• Slight tick at idle, '92 Sedan deVille.
• Accursed Ignition Timing...
• What is that tube for?
• HT 4100 - Success stories
• transmission bolt up from 4.5L to 4.1L HT4100
• Finally bought some things for the car !
• How come my motor goes full throttle on startup?
• Is this converter alright?
• Is my fuel pressure low???? 93 Deville
• Professional injector cleaning?
• A question of exhaust theory...
• Oil Pan Drain Plug Spins
• Problem adding a cutout to '90 Seville exhaust system,
• 4.5 sounds real good with no cat
• I am going to make a cut out
• RWD tranny for 4.9L??
• Flawed logic or a..
• Does Anyone Have A Step By Step Guide To Adjusting The Tps?
• Coolant gushed out on highway, engine rattles
• All Show And No Go
• Newbie here with a stall problem!
• 87 Seville...Engine problems, knocking, overheating,do I shoot it?
• 92 eldorado trunk motor sensor
• Coolant issues must be contagious
• Errr... Map/Baro code. No clue what to do.
• Yet another exhaust theory question.
• 93 Deville Loss of Power getting 6-7 MPG !!!
• Can I use a regular fuel filter?
• Where is the fuel filter?
• Can a CS144 generator on a 4.9L be opened?
• How to gut a cat?
• please help!!!!!!!
• Did I go overboard?
• Fuel: Maladies, Mayhem...Mileage!
• Whats makes one of your throtte blades wires Loose on one of the throttle blades
• Now its knocking and oil light is on!!!
• 82 Hearse Hard Starting Cold - Codes
• Uh oh! I think my waterpump finally went!
• The tricky TV cable...
• Cooling Fans
• Sometimes she idles at 600-625... sometimes 900
• Oxygen sensor cured startup WOT
• 90 Seville.. obd codes beginning with R??
• Transmission rough downshifting to 1st
• Coolant Hell (and *gulp* headgasket?)
• Tranny problem on an 89 eldo!
• Help! DeVille is dying!
• Power Steering Leak...
• This poor ol' car has been so abused.
• ****!!!! Flat Cam Now!!!!!!

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