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I have 98 n.star eng 4.6 after running for 15--20 min the
I have 98 n.star eng 4.6 after running for 15--20 min the overflow cont. overflows with hot boiling water(ther. removed) Do you think I have a blockage , head gasket or circulation problem. Water in t… read more
Jerry Newton
Jerry Newton
Cadillac Technician
Vocational, Technical or Trade Scho
1,738 satisfied customers
Cadillac Deville: OK, heres my (car) problems. 2004 Cad devil
OK, here's my (car) problems. 2004 Cad devil le, Northstar eng. Had a recent accident with a small small car. No mechanical damage to my car, a lot of front end body work, fenders, grill. ($4,000 dama… read more
Jerry Newton
Jerry Newton
Cadillac Technician
Vocational, Technical or Trade Scho
1,738 satisfied customers
Cadillac Deville: I am a 81 year old female who was involed
I am a 81 year old female who was involed in a fender bender 6/20. In getting the car fixed the mechanic is telling me that North Star motor in my car become a money pit around ten years old and since… read more
Eric
Eric
Retired
N/A
14,436 satisfied customers
I need a good old Caddy tech to chime in on this one. My wife
I need a good old Caddy tech to chime in on this one. My wife and I really enjoyed a 1994 Deville we got from the little old lady a few years back. That 4.9 was awesome and got great mileage. We took … read more
BOBBYSS
BOBBYSS
TECHNICIAN/ADVISOR
Associate Degree
8,343 satisfied customers
Cadillac Deville: my car will start up but immediately cut
my car will start up but immediately cut off,unless i hold the gas pedal then it wont shut off.… read more
Dan
Dan
Technician
Vocational, Technical or Trade Scho
26,181 satisfied customers
i am thinking of buying a 2008 STS with a 4.6L Northstar Variable
i am thinking of buying a 2008 STS with a 4.6L Northstar Variable Vavle Timing V8SFI one dealer put it this way... it has a less desirable engine. Is this true and what is the problem? this car has 77… read more
Jerry Newton
Jerry Newton
Cadillac Technician
Vocational, Technical or Trade Scho
1,738 satisfied customers
2000 Deville: mpg..accelerate..car will stall..gas pedal
2000 Deville with 230,000 milagere with reducing MPG now @13 MPG.MPG improves when driving in 3rd or 2nd gear during small trips<50 miles.Tme and speed limt recomendations while driving in these th… read more
Dan
Dan
Technician
Vocational, Technical or Trade Scho
26,181 satisfied customers
2000 cadillac deville: sitting..the easy work, brakes,tie rods etc
Have a 2000 cadillac deville thats been sitting for almost a year. All the "easy" work, brakes,tie rods etc. is finished. Upon putting a new battery in it the car would only stay in with a foot on the… read more
Gm Tech (Cam)
Gm Tech (Cam)
Cadillac Mechanic
Vocational, Technical or Trade Scho
1,090 satisfied customers
Cadillac Deville: Can a northstar engine that has a "y" in
Can a northstar engine that has a "y" in the ninth digit replaced with a northstar that has a "9" in the ninth digit without modification?… read more
heavy_chevy_396
heavy_chevy_396
Vocational, Technical or Trade Scho
2,518 satisfied customers
1994 deville: pump/regulator, air filter..module..gas pedal
1994 deville concours just stalls when it wants to and sometimes bucks like crossfiring plugs.. Have replaced fuel filter/pump/regulator, air filter, MAP sensor, cleaned all availble conectors, new PC… read more
Jerry Newton
Jerry Newton
Cadillac Technician
Vocational, Technical or Trade Scho
1,738 satisfied customers
Cadillac: distributor..the housing on the hold down screw or is..rotor
I have replace the distributor in a caddillac with an old 4.9. Does the black wire with red stripe get grounded to the housing on the hold down screw or is that simply something that holds the wore ou… read more
Randall
Randall
Auto Technician / Consultant
Vocational, Technical or Trade Scho
69 satisfied customers
1999 cadillac seville sts: northstar 4.6..driven..freeway..wont start
I recently bought a 1999 cadillac seville sts northstar 4.6 and it was rarely driven over 20 miles a day or every other day and just having it one day i went 60 miles and the message on the info panel… read more
John
John
ASE Certified Technician
2 YEARS COLLEGE
941 satisfied customers
For a 1995 SLS, 120k, northstar V8..module..highway..gas pedal
(For a 1995 SLS, 120K, northstar V8. newer Pt plugs, electronic module, reprogramming, etc. Previous sporadic service engine message due to transmission sensor). Problem: After recently driving 40 mil… read more
Dan
Dan
Technician
Vocational, Technical or Trade Scho
26,181 satisfied customers
99 Deville: trip..fluids..It has been slowly loosing coolant
99 Deville, Coolant Disappears?? The other day I and three others started a small trip. I checked the fluids before I left - toping off the coolant. It has been slowly loosing coolant for sometime now… read more
George H.
George H.
ASE Certified Technician
Associate Degree
783 satisfied customers
2001 Caddy DeVille - 4.6L Northstar V8 Problem with idle being
2001 Caddy DeVille - 4.6L Northstar V8 Problem with idle being too low-goes below 500 and stalls-one day Next day idle too high-shooting 1250 or higher-wearing out brakes Mechanic replaced 1. plenum -… read more
Tim West
Tim West
Service Manager
Computer/ Automotive certifications
16 satisfied customers
2001 Cadillac Deville: stalls..IAC..engine lights..idle, the car runs
2001 Cadillac Deville , northstar motor- car will stall after starting up, - if car will start without keeping foot on gas, the idle is down around 400rpm then drops and stalls- If start with foot on … read more
Ironmike
Ironmike
ASE Master L1 performance ,Ford tech
Vocational, Technical or Trade Scho
1,773 satisfied customers
2003 DeVille: lube..my northstar had a oil leak in the rear..engines
I took my 2003 DeVille to a quick lube joint. They told me my northstar had a oil leak in the rear of the engin a common problem with northstar engines. Mine has 86000 miles. now on three occuasions w… read more
David H
David H
Vocational, Technical or Trade Scho
2,413 satisfied customers
1998 Deville: Starter would turn engine over but no firing...theft
My 1998 Deville quit on the road. Starter would turn engine over but no firing. I've had theft security problems befor but the ignition was dead. After a few hours it would start. To-day it quit on th… read more
Dan
Dan
High School or GED
1,401 satisfied customers
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Meet the Experts:

Jerry Newton

Jerry Newton

Cadillac Technician

1,738 satisfied customers

ASE Master Technician, L1, Master GM Technician. Over 20 years of bumper to bumper GM experience.

Dave Nova

Dave Nova

Cadillac Technician

1,522 satisfied customers

ASE Master Certification. GM World Class Certification

Gm Tech (Cam)

Gm Tech (Cam)

Cadillac Mechanic

1,090 satisfied customers

GM Grand Master Technician 2007. 14 years experience.

John

John

ASE Certified Technician

941 satisfied customers

ASE CERTIFICATIONS A1-A8 & L1 / 40 YEARS AUTOMOTIVE EXPERIENCE

Chris (aka- Moose)

Chris (aka- Moose)

Cadillac Technician

811 satisfied customers

16 years of experience

George H.

George H.

ASE Certified Technician

783 satisfied customers

ASE Master Tech 15+ Years

Don - Mo Lurch

Don - Mo Lurch

Cadillac Technician

705 satisfied customers

GM, Cadillac Cert., Heavy Line Mech, Race Shop Owner, Mobile Electronics.

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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

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