• Mobil 1 10W30
• 4.9L: original red/blue A/C valve caps?
• Idle is too high now
• Slight fuel leak at TBI
• Anyone change the valve cover gaskets?
• High startup idle?
• 4.9 speed limiter...
• Oil Analysis: Proof is in the results
• indexing spark plugs
• Oil pan heater?
• gas leak from cannister (85 Eldorado)
• Coolant Supplement?
• The SEA FOAM experience thread.
• Why An Aluminum Block with Iron Heads?
• Think the engine/tranny would last?
• Problems w/ 4.9
• 88 DeVille fan continues to run after I turn it off
• 4.1/4100 Distributor Hold down- how to tighten???
• HT4100 Misfire Question
• 4.5L L (front) Cracked Header
• 4.1L.. What's the problem?
• car runs too rich didnt pass smog
• Alternator Issues--Please Help!
• Another Isc Question?
• What kind of ISC motor should i get?
• Best way to bleed the cooling system?
• 85 Deville TV Cable Adjustment
• Horrendous gas mileage
• ht4100 engine cleanup. how to?
• 85 Seville with 4.1 Engine: Buy or Run?
• 1985 deville runs great but
• serious help needed
• Failed smog test - high CO
• The continuing saga of my tranny problems...please help!
• keeps going like the energizer bunny
• Looking f/a 4100 4.1?
• 4.9 litre plug wire access problem.
• Need Help On Two More Things
• 1993 Deville power steering pump failure
• Fleetwood/DeVille Speedometer
• Serevice engine soon
• fuel injection??>??
• E055 OBD1 Code
• Chips
• Where Can I get some chips......
• 130 mph in a 4.9!
• 4.9L seville/deville fastchips or superchips performance chip
• Air Filter Question
• Your opinion of the 4.5L V8 in the 88 DeVille
• 4.9 Squeaking at Idle
• Engine mount - Any unique replacements?
• What senses the RPM on HT4100 engines?
• 86 Fleetwood engine swap
• 83 FWB Idle Problems
• Thoughts on the 4.5
• Restore Lubricants
• Frozen Pulley
• temp sensor
• oil
• 1992 seville 4.9 fuel filter location
• 4.5 water pump
• OMG water pump problem!
• Ignition Module issue
• Bad alternator in 93 Deville, need help
• Got a code do not know what or where to check
• weird SES and hard start problem
• Open Throttle Switch Signal E27
• Sputtering, loss of power when hot
• Need help 4.9 L Fuel Delivery problem
• Good old 83' Coupe Deville
• Tranny Slipping?
• part identification 4.9
• ECM software
• new cadillac seville owner coolant flush
• A.I.R. Pump 4.5l '89 Deville
• Throttle Body Plate issue
• Don't ask oil questions on this site.
• Bad Head Gasket 92 DeVille 4.9- Need opinion
• 1990 deville 4.5 air pump noisy
• Strange Timing Issues
• where do i go from here
• The Ultimate FWD Cadillac Engine Swap
• 1985 deville died
• Code E48 diagnosis
• 1983 Caddy transmission
• Low oil pressure!
• 1985 Deville with a 4100 and it will not crank
• 1985 Deville with a 4100 and it will not crank
• codes ???please help
• 1989 Caddy Deville......
• Oil Cooler Lines Leaking
• 94 Deville has almost no power from start
• Stallling at idle
• Im Having Problems With My 86 Cadillac
• 4.5 Allante intake on 93 4.9 deville
• New Trouble Code
• Bypass Catalytic Converter on 1993 Deville?
• 1990 Seville Timing chain?
• 1989 Caddy Deville......help!!!
• 4.5 TBI rough idle
• Code and Coolant Prob.
• E012,E053 Won't run
• gas pedal
• 90 deville backfiring and running rough?
• Speedometer Sensor issue ?
• Favorite things about the 4.9?
• Fixed EGR now MPG is lower
• 84 eldo conv't - 70 weight oil - yes or no?
• MAP Problems
• Help I dont want to get rid of my car BUT!
• HT-4500 Starting trouble
• '84 Eldo Code 44
• 4.5 TBI smoking
• 86 EGR Valve
• Sticky Gas Pedal...4.5L
• Intermittent Lurch—91 DeVille 4.9
• Underhood smoking... need help with a diagnosis
• engin and trany swap for an 85 coupe deville
• 4.5L TBI Grumbling
• How to start when very cold (less than 0 F)
• how to get more hp from a 4100
• Fuel pump on 4.9 92 Deville
• Stop Engine, Low Oil Pressure
• 4.1 Knock?? Or Tap??
• 4.1L injector
• HT4500 and 4900 series Performance
• Oil Level
• Need Help Please
• Engine surges at slow speed
• 4.5 differences
• 1988 Fleetwood 4.5 Distributor order
• 1985 deville ht4100 jump start
• 1985 Seville Power Steering Pulley bolt
• Installing oil pump in 4.9 engine.
• 4.9 E55 code. TPS?
• HT4100 Question
• HT 4100 knock, 83 Eldorado (I know, another thread on this)
• 4.9:Emission Fail, High HC
• GM Top End Cleaner Has Been Discontinued
• 92 4.9 DeVille runs horrible, sets codes
• Oh just great, a collapsed lifter in #1 cylinder!!
• power steering leakk
• 85 Deville Still Has Poor Performance
• Engine miss
• Need exhaust manifolds 4.1 HT4100
• 93 DeVille AC converter clutch bypass ???
• Stock Exhaust dimensions on 93 Devilles
• 4.9 or northstar?? which has less problems??
• 93 Deville stalls after car warms up
• Disaster
• Rattle Under Car
• Just finished my 4.9 Water pump repair pics inside
• New Caddy Owner, Need Some Help
• 84 eldorado fuse panel pictures?
• Roller Lifters On The 4.9?
• Cooling System - Water Pump Conditioner/Anti-Rust
• Quick question: Ignition Control Module
• Campaign 95-C-72 (recall)
• fuel pressure????
• Coolant hose to blower motor
• EGR Valve
• Getting ready for water pump removal
• Tranny problems, E39!! Please help, dont want to rebuild...
• 4.9L Rear Oil Leak
• 1993 Cadillac Seville: Please Help starting problem
• 4.1 main bearing thump
• Smoke out of exhaust
• water pump change on 4.1ltr
• Starter motor gone on 87 deville 4.1
• First time Caddy owner needs some advice please
• 93 deville
• Bad coil?
• '84 Eldorado blown head gasket?
• Rebuilding a tbi on 89 deville
• Poor mileage and slighly high HC levels
• I Broke it
• 4.9 Surges After Hot Start
• Trying to find good price on Allante gear reduction to use on my 4.9
• Want your ISC problems solved? Look here...
• engine oil cooler lines
• Fuel Mileage vs. Data Center
• New Shell Rotella T with triple protection
• Has anyone changed their catalytic converter?
• 4.9 Deville 95 whining noise like supercharger..
• Cleaned out my EGR tubes today, my E.4.8 code is gone!
• changing oil pump in 90 deville 4.5
• Low mileage 4.9 Idling Rough Engine Sputters and quits
• code help
• Trouble with diagnostics
• Get a LARGER capacity, 3 row radiator?
• Squealing under hood when cold
• How many miles on the 4.9? ?
• Hard starting
• 4.9 Liter idle
• Removing hydraulic fittings
• 88 Sedan Deville not liking the winter
• Timing Question
• Location of the CAM Position Sensor on the 95 4.9L deville?
• Fuel
• How to clean out EGR valves and throttle body?

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