• What are the pro's and con's of upgradeing your ignition system on a 4.9?
• Engine paranoia
• remove fuel rail to change fpr on 4.9
• rough idle and bad miss
• Whistling Sound
• What should I do to fix my bad gas mialage (really bad)
• 4.9 Questions...
• OBDI vs OBDII; AC compressor
• ecm data
• '85 Deville, HT4100, considerable problems running properly...seeking help
• Diagnostic code ?/EGR Valve
• Fuel Injector Ripoff...
• P/N for gaskets
• Need help on alighning PRNDL switch.
• Serpentine Belt Diagram 4100
• idle problem
• prndl code
• 91 deville stumbles after warming up
• What is this sensor on the back of my 4.9 motor?
• PCV pipe???
• 88 Eldorado wont start
• 1990 deville vacuum
• 10 mpg city and its not even like a city.Can it be my fpr.
• Breather on 4T60E, is there and if so where is it?
• Oil pan gasket
• ISC motor problem? '94 Deville
• 1990 deville low reading
• car throwing codes, decypher them please :D
• Fuel Pressure 92 Deville
• 4.5 wont start after head gaskets
• Throttle body gasket?
• Coolant Leak - How to find?
• 83 cadillac 4.1
• Why Wont It Start?!!!
• 90 Deville ignition wire, cap, rotor
• Timing Chain
• 92 Deville Rough Idle Periodic Stallin
• Knocking
• Discussion about caddeville's project (split from 4.9 into 88 Eldorado)
• 4.9 into 88 eldorado
• Power improvement... from a carburator?
• My Fuel Injectors :(
• Comparing Dexcool and green stuff
• Should I flush tranny at 52K????
• Speed limiter...
• Northern Indiana Users?
• Octane and fuel prices vs performance
• Any fresh tips for re-manufactured 4100 seeker?
• Sonofabitch !!!!!!
• Ram Air/Cold air intake for 4.9?
• 4100 emmissions air pump
• Please help an old man. (Backfiring voodoo fleetwood)
• 1990 deville help
• Nylon or Metal timeing chain?
• Need a good write up for cleaning Tb and EGR valve please (4.9)
• Heatsoak and Starters. Is this a Caddy problem too or just Cadero's.
• Sad Caddy's in the background.
• Water Pump for 89 DeVille
• Good care (ATF) for 4T60E
• Tranny problems engaging
• 4.1 vs 4.9
• 88 DeVille Serpentine Belt
• Noise in Transmission?
• Please Help! 4.9 won't shift out of second gear.
• 1994 Deville 4.9 fuel pressure
• Yet another head gasket question
• Replaced everything...stumble is worse.
• Oil Leak 91 Eldorado 4.9
• Uneven idle
• 89 deville 4.5 tranny in 93 seville 4.9 will it work?
• Does everyone have mandrel-bent piping?
• Some people just don't want to listen
• Fuel injector problem?
• Need help asap.I have a draeded p093, is my trans gone?
• (3 4.9 bad mpg.Can low ac refrigerint cause this?
• engine change
• Emmissions Testing and the 4.9 and BC Canada guys in here
• Is my transmission fluid ok or do I need to change it out?
• E048
• Simple question, what does the HT stand for
• Knock sensor on HT4100?
• lots of ice and no brake servo :(
• Fastchip - Does it work?
• Error code 29
• Cold air zapping coil!
• 1984 Eldo 4.1 Engine Color Needed
• 4.9L Fuel Economy
• 84 Eldorado No Start
• Car surges when accelerating
• frontend noise
• Underdrive pulleys?
• spongy/soft brakes
• Question on armature in SD250 starter
• engine miss 4.5 ???
• 4.9 in Brougham??
• Engine revs when I turn the wheel????????
• '90 DeVille ISC motor problem SOLVED
• 94 Deville misses backfires & DIES! whats wrong
• What is the Factory Timing for a 93 Eldorado
• I want a DIC (get your mind out of the gutter) :D
• Can't get my 4.9 to Adjust timing
• Stoneys Main Bearing Diary
• Braking Engine Jump... 1990 DeVille
• Second generation HT4100
• new oils verses old oils
• 95 4.9 flywheel breakage?
• Valve Lash Adjustment
• 1992 DeVille Misfiring, or something.
• Fuel Pump Relay
• How to replace water pump on 92 seville?
• Gurgling Sound In Engine?
• Not getting enough spark
• Not again!!
• Oxygen Sensor
• unique problem 4.9
• HT4100 valve train pics
• pinhole in block, leaks coolant, what should I do?
• horsepower for 4.9
• 1984 Fleetwood Code 52 ECM memory reset problem
• Caddi still not starting
• nees help fast please
• '94 4.9 electrical problem!
• engine rev's and dies
• Low oil pressure at idle
• throddle control
• something happened today with the 90 deville and i don't know what
• Feels like mis-fire. 85 fleetwood 4.1
• Replacing warning lights in dash
• Cruise control not working
• Where is the MAP sensor located ???? 84 Seville
• Min air ????
• Another TPS ?????
• 87 Deville 4.1- No fuel!!!!!
• Water Pump Leakage!!!
• Help with a water pump installation!!
• 1990 Cadillac Sedan Deville high idle
• Trans cooler leak!
• A question for the gurus
• Mobil 1 Extended Performance? BBob!
• 1990 Sedan Deville 4.5L A Few Questions
• Stumbling, hesitation, backfiring 89 Deville 4.5
• Minimum IDLE SCREW adjustment
• 4100 timing question
• High voltage problem on '94 4.9
• Oil cooler line o-ring
• Is my ISC motor shot? ('90 4.5L)
• 89 Deville engine pinging under load when warm
• Help with identifying a GM Goodwrench replacement block.
• new isc and tps
• 4.5L - 155hp, 180hp, 200hp variants and questions!
• Deville 4.1 fwd rear main oil seal leak :(
• Deville shakes violently .. Please help!
• Code Triggered: E66
• Repair cost too high?
• Ac Compressor
• FWD HT4100 air pump pupose?
• How Hot is too hot, Ouchi Hottie story inside.
• 4.x starter interchange list
• 4.9 91' coupe suspension level
• 1993 Deville ODB Codes Tripped, Idle Motor
• Where do these fuel lines run??
• Emission test failure
• Honest idiot lights
• Teardown set for friday ...
• Is this repair worth it?
• 89 cadillac 4.5 oxygen sensors
• Oh No!!!!! Blown 4.9 Headgasket !!!!
• Bore spacing
• 87 Deville NO FUEL!!!!
• 4.9 Just started running rough at idle
• 1990 Cadillac Sedan DeVille - Idling Too High
• water pump
• Thermosat Question
• Oil Pan Gasket replacement on a 4.5L
• Motor mounts/CV Joint
• Whats the best place to find a replacment 4.9
• Are 1990 Throttle bodies obsolete?
• Error Code E41 — Camshaft Position Sensor
• fuel pump?????
• A question about the Rotella Motor Oil
• Swap ?'s
• 4.9 knocking
• water pump replacement
• 4.9 starter problems
• Wheels interchangeable?
• 94 deville runs rough at cold start
• 4.9 life expectancy
• Engine replacement on an 88 Coupe
• So Even After $700 dollars it still leaks!
• EGR valve replacement fixed the knocking problem!
• Pls Help 4.9 ac compressor froze
• How do I get my 4.5L to coast down to the "70 mpg" benchmark?
• Crossover pipe
• 87 Deville Intake
• water pump leaking after i change it
• emissions failed
• How to enter override E.5.3 on a '90 DeVille
• Code P039 Current?
• 4.9 intake manifold
• Hose question & error code 30 and 34

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