Smoking out the rough idle and stalling of Expedition

  • Article by: PAUL BRAND
  • Updated: January 18, 2014 - 5:26 PM

Q: I have a 2001 Ford Expedition with the 5.4-liter V8 and 103,000 miles. At 98,000 miles it developed a rough idle and began stalling at stop signs.

My local mechanic noticed low fuel pressure and replaced the fuel filter and fuel pump. It ran good but then the “Check engine” light came on and the rough idle and stalling returned. The mechanic could not find anything wrong but a scan found codes P0171 and P0174. Another mechanic came up with the same codes and checked for vacuum leaks but could not find any. I have continued to drive the vehicle and the “Check engine” light is still on. Any suggestions?

A: My ALLDATA automotive database confirmed that the P0171 and P0174 codes indicate a lean fuel/air condition from both cylinder banks. Since technicians have checked for but not found the problem, I’d suggest a “smoke” test to help identify any vacuum leaks. This simple test involves introducing a non-toxic smoke into the crankcase under low pressure and then watching for any smoke escaping from the engine, induction system or vacuum lines.

Also, a ruptured diaphragm in the fuel pressure regulator, located on the fuel rail downstream of the fuel injectors, could cause low fuel pressure as well as fuel leakage directly into the intake manifold. If there’s liquid fuel in the vacuum line at the regulator, the diaphragm is ruptured. Rough idle and stalling at stops are often symptoms of a failed fuel pressure regulator.

Q: I own a 2008 2.4-liter four-cylinder Toyota Camry with 98,000 miles that I service every 5,000 miles. For the past 15,000, miles I have had to add 2 to 2½ quarts of engine oil between changes. The service writer at the Toyota dealership tells me that 1 to 1½ quarts every 5,000 miles is normal for these aluminum engines. I have not noticed a decrease in engine power or any smoke from the tailpipe. I bought this car new expecting to get 200,000 miles out of it. I think this is a lot of oil for a car to burn.

A: One quart per 2,000 miles is completely within Toyota’s “normal” oil consumption guidelines of one quart per 1,200 miles. Your concern is due to the change in oil consumption. Has oil use continued to increase? Or is it stable at this rate? Unless or until the consumption rate increases to excess, I would not be particularly concerned.

Unless oil use is being caused by a clogged PCV system or “sticky” piston rings, there’s no easy “fix.” You could try de-carbonizing the rings/grooves to free any sticking rings that could increase the amount of oil reaching the combustion chambers. Remove the spark plugs after shutting down the hot engine and pour an ounce or so of SeaFoam directly into each cylinder. After an hour or overnight, temporarily disable the ignition and fuel injection and crank the engine to expel any liquid in the cylinders. Reinstall the plugs, re-enable the ignition and injection, then start and drive the vehicle for at least 20 minutes.

Q: I use “high-mileage” oil and change it every 3,000 miles on my two high-mileage cars. What kind of oil I should use when topping up the oil between changes during this very cold weather? Would 0W-20 full synthetic be the best bet? What is your opinion on using 0W-20 full synthetic for the regular oil changes during the cold months?

A: When adding oil between oil changes, use the same brand/viscosity already in the crankcase. Adding a different oil isn’t harmful but the additive package and viscosity are likely not the same. I don’t think 0W-20 would be a good choice in high-mileage vehicles unless the carmaker suggests it in the service recommendations. For most modern engines a full synthetic 5W-30 would be a good choice in cold temperatures.

  • get related content delivered to your inbox

  • manage my email subscriptions

ADVERTISEMENT

Cleveland 11/23/14 12:00 PM
Atlanta
Tennessee 11/23/14 12:00 PM
Philadelphia
Detroit 11/23/14 12:00 PM
New England
Green Bay 11/23/14 12:00 PM
Minnesota
Jacksonville 11/23/14 12:00 PM
Indianapolis
Cincinnati 11/23/14 12:00 PM
Houston
Tampa Bay 11/23/14 12:00 PM
Chicago
Arizona 11/23/14 3:05 PM
Seattle
St. Louis 11/23/14 3:05 PM
San Diego
Miami 11/23/14 3:25 PM
Denver
Washington 11/23/14 3:25 PM
San Francisco
Dallas 11/23/14 7:30 PM
NY Giants
NY Jets 11/24/14 6:00 PM
Buffalo
Baltimore 11/24/14 7:30 PM
New Orleans
Chicago 11/27/14 11:30 AM
Detroit
Philadelphia 11/27/14 3:30 PM
Dallas
Seattle 11/27/14 7:30 PM
San Francisco
Phoenix 106 FINAL
Indiana 83
Miami 99 FINAL
Orlando 92
Philadelphia 83 FINAL
New York 91
Toronto 110 FINAL
Cleveland 93
Dallas 92 FINAL
Houston 95
Sacramento 113 FINAL
Minnesota 101
Brooklyn 87 FINAL
San Antonio 99
Washington 108 4th Qtr 1:04
Milwaukee 97
New Orleans 77 4th Qtr
Utah 72
St. Louis 3 FINAL
Ottawa 2
Montreal 2 FINAL
Boston 0
Detroit 1 FINAL
Toronto 4
Minnesota 1 FINAL
Tampa Bay 2
Pittsburgh 1 FINAL
NY Islanders 4
Columbus 2 FINAL
Philadelphia 4
Buffalo 2 FINAL
Washington 1
Florida 2 FINAL(SO)
Nashville 3
Los Angeles 4 FINAL
Dallas 5
Carolina 3 3rd Prd
Colorado 2
New Jersey 2 2nd Prd
Calgary 0
Chicago 3 2nd Prd
Edmonton 0
Arizona 1 1st Prd 9:51
San Jose 0
Incarnate Word 79 FINAL
Princeton 68
Robert Morris 66 FINAL
Georgetown 80
Notre Dame 81 FINAL
Massachusetts 68
Saint Peters 50 FINAL
La Salle 59
Ball State 69 FINAL
IUPUI 71
Utah State 63 FINAL
Miss State 71
High Point 56 FINAL
Richmond 80
Appalachian St 65 FINAL
Virginia Tech 63
Drake 75 FINAL
Western Mich 91
Samford 72 FINAL
CS-Northridge 79
Colgate 54 FINAL
Campbell 48
North Carolina 90 FINAL
Davidson 72
North Florida 49 FINAL
Northern Iowa 66
UMass Lowell 63 FINAL
NJIT 61
Nebraska Omaha 97 FINAL
Marquette 89
Clemson 59 FINAL
Nevada 50
Florida State 54 FINAL
Providence 80
South Alabama 53 FINAL
Detroit 66
Texas State 67 FINAL
TX-San Antonio 80
Trinity Christian 52 FINAL
Chicago State 75
Liberty 52 FINAL
Miami-Ohio 63
Western State 60 FINAL
Air Force 90
Elon 67 FINAL
Northwestern 68
Canisius 53 FINAL
St Bonaventure 59
MD-Eastern Shore 53 FINAL
St Francis-PA 57
Cleveland State 83 FINAL
Savannah State 87
SE Missouri St 74 FINAL
Central Arkansas 68
UMKC 68 FINAL
Ark-Little Rock 73
Southern U 48 FINAL
Middle Tennessee 66
Longwood 72 FINAL
Youngstown St 82
Towson 63 FINAL
Bethune-Cookman 42
Loyola-Maryland 39 FINAL
Butler 80
San Jose St 66 FINAL
Cal State Fullerton 70
Texas Southern 66 FINAL
Norfolk State 76
Yale 53 FINAL
Southern Ill 46
LSU 72 FINAL
Weber State 58
South Dakota 68 FINAL
Wofford 72
Duquesne 102 FINAL
Abilene Christian 81
Wright State 86 FINAL
Char Southern 79
Miles 71 FINAL
Jacksonville St 88
Binghamton 63 FINAL
Manhattan 78
Alcorn State 80 FINAL
Kennesaw St 83
Bob Jones Univ 50 FINAL
Citadel 81
Piedmont International 33 FINAL
Coastal Carolina 76
Johnson University 41 FINAL
Ga Southern 97
Brown 66 FINAL
Indiana State 78
Colorado 33 FINAL
Wyoming 56
Quinnipiac 76 FINAL
Albany 73
Mount St Marys 73 FINAL
Bucknell 69
Master's College 45 FINAL
UC Santa Barbara 91
UNC-Asheville 87 FINAL
East Tenn St 98
Clermont College 50 FINAL
Eastern Ky 115
UNC Greensboro 62 FINAL
Eastern Mich 70
American Univ 44 FINAL
Louisiana Tech 63
Army 76 FINAL
Marist 62
Hartford 65 FINAL
Niagara 62
Lafayette 83 FINAL
Penn 77
Nebraska 62 FINAL
Rhode Island 66
Vermont 60 FINAL
Saint Josephs 68
Eastern Wash 68 FINAL
SMU 77
UNLV 57 FINAL
Temple 50
Chattanooga 67 FINAL
Tenn Tech 69
UNC-Wilmington 110 FINAL
Va Military 93
Ohio Midwestern 48 FINAL
Northern Ky 98
Sam Houston St 74 FINAL
Fairfield 60
UC Davis 58 FINAL
Furman 55
Ill-Chicago 60 FINAL
Kent State 78
Transylvania 63 FINAL
Lipscomb 74
Central Conn St 50 FINAL
Monmouth 65
Oakwood 61 FINAL
Alabama A&M 81
Morgan State 57 FINAL
Houston 72
Lamar 72 FINAL
Indiana 85
Northeastern 68 FINAL
Navy 44
William & Mary 69 FINAL
Rice 65
Missouri State 68 FINAL
Texas Tech 80
TX A&M-Kingsville 77 FINAL
TX-Pan American 82
Southern-New Orleans 45 FINAL
Tulane 89
SE Louisiana 57 FINAL
Western Ill 60
Belmont 64 FINAL
Western Ky 63
Hampton 66 FINAL
North Dakota St 74
UMBC 51 FINAL
Minnesota 69
Houston Baptist 69 FINAL
Texas-Arlington 87
St Thomas Aquinas 52 2nd Half 1:40
Gonzaga 105
Utah Valley U 85 FINAL
Southern Utah 75
New Mexico St 61 2nd Half 6:53
Texas-El Paso 59
Stanford 35 2nd Half 15:25
Duke 50
Morehead State 49 2nd Half 10:16
Presbyterian 36
SIU Edwardsville 28 2nd Half
Portland 46
Boise State 24 2nd Half
Wisconsin 38
Valparaiso 11/23/14 8:30 AM
Maine
Kent State 0 Cancelled
Buffalo 0
Texas-El Paso 13 FINAL
Rice 31
Air Force 14 FINAL
San Diego St 30
San Jose St 7 FINAL
Utah State 41
Char Southern 9 FINAL
(9) Georgia 55
South Alabama 12 FINAL
So Carolina 37
Rutgers 3 FINAL
(10) Michigan State 45
Minnesota 28 FINAL
(21) Nebraska 24
Northwestern 38 FINAL
Purdue 14
(18) Marshall 23 FINAL
UAB 18
Kansas 7 FINAL
(23) Oklahoma 44
Indiana 27 FINAL
(7) Ohio State 42
Penn State 14 FINAL
Illinois 16
(14) Eastern Ky 3 FINAL
Florida 52
TX-San Antonio 7 FINAL
Western Ky 45
SMU 7 FINAL
UCF 53
Tulsa 28 FINAL
Houston 38
Virginia Tech 3 FINAL
Wake Forest 6
Washington St 31 FINAL
(13) Arizona State 52
Louisiana Tech 27 FINAL
Old Dominion 30
Western Mich 32 FINAL
Central Mich 20
New Mexico 20 FINAL
(22) Colorado State 58
Eastern Mich 30 FINAL
Ball State 45
Appalachian St 35 FINAL
Louisiana 16
(15) Arizona 42 FINAL
(20) Utah 10
FIU 14 FINAL
North Texas 17
(8) Ole Miss 0 FINAL
Arkansas 30
Louisville 31 FINAL
Notre Dame 28
Maryland 23 FINAL
Michigan 16
Texas Tech 34 FINAL
Iowa State 31
(14) Wisconsin 26 FINAL
Iowa 24
Syracuse 7 FINAL
Pittsburgh 30
Boston College 17 FINAL
(1) Florida State 20
Georgia State 0 FINAL
Clemson 28
Tulane 6 FINAL
East Carolina 34
Stanford 38 FINAL
California 17
Western Carolina 14 FINAL
(2) Alabama 48
ULM 30 FINAL
New Mexico St 17
So Florida 20 FINAL
Memphis 31
Colorado 10 FINAL
(3) Oregon 44
Fla Atlantic 34 FINAL
Middle Tennessee 35
Samford 7 FINAL
(16) Auburn 31
Miami-Florida 13 FINAL
Virginia 30
Vanderbilt 0 4th Qtr 1:50
(4) Miss State 51
(19) Missouri 29 4th Qtr 1:52
Tennessee 21
Oklahoma State 28 4th Qtr 2:15
(6) Baylor 49
(24) USC 14 4th Qtr 11:07
(11) UCLA 38
Cincinnati 41 4th Qtr 11:13
Connecticut 0
Boise State 7 1st Qtr 7:23
Wyoming 0
Oregon State 0 1st Qtr 8:15
Washington 7
Fresno State 0 1st Qtr 9:33
Nevada 0
UNLV 10:00 PM
Hawaii
Ohio U 11/25/14 6:00 PM
Miami-Ohio
LSU 11/27/14 6:30 PM
Texas A&M
(5) TCU 11/27/14 6:30 PM
Texas
Northern Ill 11/28/14 10:00 AM
Western Mich
(21) Nebraska 11/28/14 11:00 AM
Iowa
Western Ky 11/28/14 11:00 AM
(18) Marshall
UCF 11/28/14 11:00 AM
So Florida
Houston 11/28/14 11:00 AM
SMU
Akron 11/28/14 12:00 PM
Kent State
Ball State 11/28/14 12:00 PM
Bowling Green
Buffalo 11/28/14 12:00 PM
Massachusetts
Toledo 11/28/14 12:00 PM
Eastern Mich
Arkansas 11/28/14 1:30 PM
(19) Missouri
Navy 11/28/14 2:00 PM
South Alabama
(13) Arizona State 11/28/14 2:30 PM
(15) Arizona
Stanford 11/28/14 2:30 PM
(11) UCLA
(22) Colorado State 11/28/14 2:30 PM
Air Force
Virginia 11/28/14 7:00 PM
Virginia Tech
East Carolina 11/28/14 7:30 PM
Tulsa
BYU 11/29/14 2:00 AM
California
(20) Utah 11/29/14 2:00 AM
Colorado
(3) Oregon 11/29/14 2:00 AM
Oregon State
Notre Dame 11/29/14 2:00 AM
(24) USC
Wake Forest 11/29/14 2:00 AM
(25) Duke
Pittsburgh 11/29/14 2:00 AM
Miami-Florida
North Texas 11/29/14 11:00 AM
TX-San Antonio
Old Dominion 11/29/14 11:00 AM
Fla Atlantic
(17) Georgia Tech 11/29/14 11:00 AM
(9) Georgia
Kentucky 11/29/14 11:00 AM
Louisville
So Carolina 11/29/14 11:00 AM
Clemson
West Virginia 11/29/14 11:00 AM
Iowa State
Rice 11/29/14 11:00 AM
Louisiana Tech
Michigan 11/29/14 11:00 AM
(7) Ohio State
Purdue 11/29/14 11:00 AM
Indiana
Illinois 11/29/14 11:00 AM
Northwestern
Cincinnati 11/29/14 11:00 AM
Temple
NC State 11/29/14 11:30 AM
North Carolina
Syracuse 11/29/14 11:30 AM
Boston College
Louisiana 11/29/14 11:30 AM
Troy
Texas State 11/29/14 1:00 PM
Georgia State
Idaho 11/29/14 1:00 PM
Appalachian St
Wyoming 11/29/14 2:00 PM
New Mexico
New Mexico St 11/29/14 2:00 PM
Arkansas State
UAB 11/29/14 2:30 PM
Southern Miss
(4) Miss State 11/29/14 2:30 PM
(8) Ole Miss
(10) Michigan State 11/29/14 2:30 PM
Penn State
Minnesota 11/29/14 2:30 PM
(14) Wisconsin
(6) Baylor 11/29/14 2:30 PM
Texas Tech
Florida 11/29/14 2:30 PM
(1) Florida State
Rutgers 11/29/14 2:30 PM
Maryland
San Jose St 11/29/14 2:30 PM
San Diego St
Tennessee 11/29/14 3:00 PM
Vanderbilt
Kansas 11/29/14 3:00 PM
(12) Kansas State
Connecticut 11/29/14 3:00 PM
Memphis
ULM 11/29/14 5:00 PM
Ga Southern
Middle Tennessee 11/29/14 6:00 PM
Texas-El Paso
Hawaii 11/29/14 6:00 PM
Fresno State
(16) Auburn 11/29/14 6:45 PM
(2) Alabama
Utah State 11/29/14 9:15 PM
Boise State
Washington 11/29/14 9:30 PM
Washington St
Nevada 11/29/14 9:30 PM
UNLV
Montreal 11/23/14 12:00 PM
Hamilton
Edmonton 11/23/14 3:30 PM
Calgary
TBA 11/30/14 5:00 PM
TBA
Grand Canyon 77 FINAL
Austin Peay 84
Bowling Green 60 FINAL
Milwaukee 50
St Bonaventure 68 FINAL
Detroit 56
Illinois-Chicago 72 FINAL
Miami-Ohio 69
Louisiana Tech 55 FINAL
Louisiana 58
MD-Eastern Shore 57 FINAL
Marshall 74
Butler 77 FINAL
Fairfield 81
Central Conn St 81 FINAL
UMass Lowell 58
Bucknell 61 FINAL
Fairleigh Dickinson 60
St Marys-CA 57 FINAL
UC Davis 55
UNC-Asheville 53 FINAL
South Florida 97
Colgate 51 FINAL
Drexel 59
Niagara 64 FINAL
Buffalo 73
Vermont 61 FINAL
Boston U 66
Marist 51 FINAL
Northeastern 58
UNC-Wilmington 72 FINAL
Appalachian St 82
Duquesne 52 FINAL
Green Bay 84
Saint Josephs 75 FINAL
Liberty 76
Army 81 FINAL
Manhattan 49
Eastern Michigan 75 FINAL
TX-Pan American 81
Southern Ill 50 FINAL
Wright State 70
Youngstown St 70 FINAL
Radford 44
Stetson 62 FINAL
Indiana State 52
Rockhurst 65 FINAL
UMKC 60
Ark-Little Rock 55 FINAL
Rice 40
(23) Syracuse 77 FINAL
Jacksonville 61
NC Central 53 FINAL
Gardner-Webb 73
New Orleans 51 FINAL
Jacksonville St 65
(22) Rutgers 64 FINAL
LSU 57
Missouri State 36 FINAL
(21) Oklahoma St 77
Eastern Washington 53 FINAL
SMU 69
Houston Baptist 61 FINAL
Texas State 56
TX-Arlington 61 FINAL
Wichita State 71
(9) Maryland 75 FINAL
George Washington 65
Presbyterian 51 FINAL
Western Carolina 44
St Francis-NY 71 FINAL
Rider 60
Central Arkansas 56 FINAL
Jackson State 45
Kennesaw St 72 FINAL
Georgia Southern 51
Loyola-Chicago 45 FINAL
Northern Ky 38
Howard 64 FINAL
La Salle 65
San Jose St 91 FINAL
Cal-Irvine 65
Tennessee St 73 FINAL
Lipscomb 55
San Francisco 53 FINAL
UC-Riverside 66
Temple 56 FINAL
Kansas 76
San Diego 58 FINAL
Idaho 52
Concordia (OR) 35 FINAL
(20) Oregon State 92
Corban 74 FINAL
Portland State 64
Charleston Southern 48 FINAL
Wofford 55
UT Martin 58 FINAL
Pepperdine 59
Eastern Kentucky 64 FINAL
Mercer 69
Weber State 40 FINAL
Utah Valley U 61
North Dakota 54 FINAL
Towson 52
Seton Hall 75 FINAL
Penn State 70
LSU-Shreveport 58 FINAL
Grambling 67
Brown 57 FINAL
New Hampshire 60
Penn 60 FINAL
Navy 51
Xavier 89 FINAL
Binghamton 71
Georgetown 58 FINAL
Alabama 72
(13) Kentucky 71 FINAL
Central Michigan 68
Texas Southern 52 FINAL
TCU 69
South Dakota St 62 FINAL
(18) DePaul 84
Talladega 70 FINAL
Ark-Pine Bluff 66
Arkansas State 69 FINAL
Colorado 80
Alcorn State 43 FINAL
UAB 57
Tenn Tech 61 FINAL
Valparaiso 79
Dayton 83 FINAL
(19) Iowa 88
Nevada 41 2nd Half 14:35
BYU 50
Connect with twitterConnect with facebookConnect with Google+Connect with PinterestConnect with PinterestConnect with RssfeedConnect with email newsletters

ADVERTISEMENT

ADVERTISEMENT

ADVERTISEMENT

 
Close