• New to Throttle Body Injection?
• Two Problems Not Starting and Stalling
• heat issues!!!!
• '93 Eldorado, 4.9L - Partial Fire, No Start
• 4.9 water pump
• 4.9ltr Northstar performance?
• oil change
• new and need some help please!!!!!
• Crazy Coolant Temperatures
• How do you clean 4.5 throttle body?
• 4.9 stalls
• How many miles can you expect out of a 4.9 engine and transmission?
• 4.1 Running Bad Again
• Coupe Deville 4.5 Rough Running
• slight hesitation at cold low-gear
• '93 Eldorado, 4.9L - Bad Fuel Pump?
• 1994 Sedan Deville questions...
• Piston 6 hits sparkplug - Bad timing
• For those of you with coolant loss issues.
• What should I do, buy or walk? 89 Coupe Deville
• 4.5 Allante Intake on a 4.9 Eldorado
• E20 - Open Fuel Pump Circut Feedback Signal
• Need Help ASAP!!!!!!
• Lound thump when shutting off engine, then no restart
• 4.9 Oil Filter ??
• 4.9 and spark knock
• I really need help, please!
• Question when torquing headbolts 4.9L
• will my 4.9 fit?
• Synthetic oil no no in 4100
• 1986 cadillac Stalling up hills, need help ASAP
• Case of the Evil Tranny
• C bieng displayed
• New brain wracking symptom...
• Replaced Water Pump on 89 4.5 Still leaking
• My Car is Fixed!!! New Camshaft and Lifters
• Poor gas mileage/Sensors, please help a bit!
• Decking out my 4.9
• 4.1 Spun a cam bearing,
• More HT4100 Tips
• 85 Fleetwood FWD Won't Start! Help!
• A/C Compressor Belt Bypass - 89 Deville 4.5
• Is this engine rebuildable?
• Blown Head gasket
• car surges badly when stopping
• all 4100's interchangable?
• RPO Code of the 90 4.5L V8?
• Choke?
• New Member Introduction
• Life expectancy for 4.9 and 4T60E
• HT4100 "STOP ENGINE-OIL PRESS" light flickering
• Allante HT4100
• HT4100 Recommended Oil Viscosity
• VIDEO of HT4100 WOT
• Engine Miss, (electronic not mechanical)
• 4100 Book
• engine knock in my 1994 sedan deville 4.9L
• 4.9l oil leak
• Tuning for E10 gasoline
• HT4100 PCV valve, location?
• 4.9L idle issues... no power.. etc.. TPS?
• Radiator Drain Plug
• Water
• engine id
• swap 4.1 to a 4.5 or 4.9 in 85 Seville?
• 4100 Newbie needs help!
• Losing coolant when the heat is turned on.
• Can fuel injector effect the map sensor and how it function
• Water Pump on an '85 fleetwood
• 4.9L 1995 deville car ran out of gas but wont start
• 86-87 Seville, Eldorado 4.9L Swap
• Won't start when hot (intermittent)
• 4.9 firing order???
• 1994 deville
• 76 Eldo 500 FI Problems
• HT4100 chosen as one of the worst engines of all time
• New Addition to the Family--85 Sedan Deville
• No start, at operating temp, Flooding on restart
• Code Analyzer
• 92 Deville losing power after turning a corner
• swap 4.1 to a 4.5 or 49 in 85 Seville?
• Well, i raced 3 cars in one night with my 4.1
• Help Ecm/PCM Questions
• How long will it last?
• Valves too far in advance or too far retarded?
• Water pumps...Generally speaking.
• 1994 deville 4.9
• '93 Eldorado 4.9L - P012 & P053 Codes
• which O2 sensor for 85 DeVille/HT4100
• Cam sensor 4.9
• Code e048 what's the trigger?
• Turbo Muffler on a 4.9
• Urgent Help W/engine
• 4.9 Code 41 Saga Continues!!!
• 83 fleetwood 4100
• Huge Problem HELP !!!
• 1991 Fleetwood 4.9 high speed power loss
• code p091 4.9 94 deville
• 92 STS - Stalls anywhere but the highway.
• flickering Service Soon and no codes...
• Interesting 4.9 symptom, need ideas
• Help wth tps (Throttle Position Sensor) problem/ Or just removing Throttle Body
• Crank pulley wont spin...
• Injector Trouble 4.9
• She runs!
• 84 Seville - low speed hesitation
• 4.9 distributor bushing wear
• 85 Seville 4.1 Knocking?
• poor gas milage
• NOISEY cold start ups with the pulleys, only to quiet down when warm.
• 4.5 to 4.9
• 1990 Deville running poorly.
• I Lost First Gear, Car barely moves with throttle!
• 4.9 performance
• 85 Deville 4.1L Oil problems.
• Flat cam or bad lifter?
• My speedometer is WAY off, and has problems in park
• would an oil stabilizer help with burning
• 1987 Cadillac Deville No Fuel Preasure Im lost
• gas issue
• '88 DeVille EXTREME ISC problems
• 91 deville Starter enable relay
• Removing EGR valve - 4100
• 93 Eldawg Stalls while driving but drives great
• EGR System Question
• Bosch 19# Injectors
• 83 Deville Performance?
• ECM questions
• Blower motor not operating
• Water Pump Removal
• OBD1 Codes
• HT4100 Brand New
• Help! 1983 Seville with HT-4100 FWD, need ideas for a swap-out?
• 91 Deville 4.9l No Start Issue
• 6.0L? say what?
• Any good 4.x mechanics in the Detroit area?
• Weird 4.9l issues
• '91 4.9 swap into a rear drive application?
• 1985 4.1L Distibutor Drive Gear for oil pump
• SERVICE SOON telltale light!!
• Possible Transmission Problem when shifting from park
• 4.9 groaning
• 1985 Fleetwood FWD 4.1L hesitation/rough idle/won't start
• ISC RPM Out Of Range
• replacing camshaft bearings?
• Water Pump - Snapped Bolt
• Another tip for 4.x car owners
• Premium Fuel in the 4.9?
• Won't Start After Driving
• need help concerning tune up
• newbie need help
• Engine Noise
• my 4100--what would you do
• should I replace the catalytic converter
• how many mods do you all know about?
• high output alternator
• Torque converter lock up solenoid, Where?
• 1990 deville shifting problem
• TBI injectors
• Code E15???????
• 4.1 Engine: Sensor Above #8 Spark Plug?
• e44 o2 error
• Cadillac 4.5L PFI and 4.9L PFI IAT?
• '92 Deville 4.9 runs great at startup, runs like crap when hot
• Non GM parts=sick Cadillac??
• 4.9 Deville Concours driving terrible again!
• 85 Eldo HT 4100 ISC/TPS
• Engine Swap
• 4100 engine temp??
• 4.5 spark plugs
• Finally Solved 4.1 Hesitation: Coil & Plug Wires
• what is that god awful smell
• 4.1 Sputters and pops
• 91 Fleetwood injector impedence?
• How do I access the internal codes and what are the normal parameters for a '92 4.9?
• Need help with 85 Eldo HT4100 Tuneup
• service vehicle soon is on my dash
• Thanks for the muffler info
• Another BIG 4.x Engine Tip--Especially for 4.1 Owners
• Coolant Temp Light = Sensor?
• 4.9 Will Not Idle Below 2500rpm!
• Tips on swapping HT4100 for 500
• 4.9 stalling problem,and allante question
• Need Tps Help
• 4.9l Starter Connection Problem
• Conflicting torque information
• Checked your A.I.R. system filter lately?
• 4.5 Cooling System Woes...
• Remanufactured HT4100 - 10K and now oil in radiator/leak
• 1990 Deville PRNDL problem
• Replacing water pump on '87 4100 - tips?
• 4100 seville engine swap help needed
• 4.1 to 4.9.... RWD?
• EGR stack tubes?????
• HT4100 Backfires
• Fuse Popping on AC Clutch
• HT4100 Running BAD when warm.
• 4.9 hesitates on highway
• Any great 4.9 mods?
• Fuel/exhaust smell seems too strong...dangerous?

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