Question about 1999 Buick LeSabre

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Rough idle Where is the egr value located? Where are the vacuum lines? Thanks

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With the 3.8 engine here is a pic of the EGR and the line are only on top of the motor try the carb cleaner trickrough idle - af6dc2f.gif

Posted on Aug 24, 2008

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Replaced the egr value on a 1993 gmc Sierra still doing the same thing any suggestions


Check that the EGR vacuum solenoid is working. Remove the vacuum line to the EGR and there should be no vacuum in that line with the engine at idle.

May 22, 2015 | 1993 GMC Sierra

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Hey. I need a picture or diagram of location vacuum hoses/lines for a 2003 GMC yukon xl? How many lines/hoses are there? My truck engine came on and lost of power and rough idle. They say it a crack r


There are only 2 vacuum hoses on that engine Sean. One from the intake to the vacuum brake booster, One to the fuel pressure regulator. pull the small hose off of the fuel press regulator and see if gas/fuel is present. if so, replace or have the regulator replaced. typically, I find problems with the EGR tube being rotted and sucking air. this causes a lean code usually. you can spray the EGR tube to check it by spraying choke cleaner into the silver portion of the sleeve around it. if you notice the idle smooths out or picks up, you need to replace the egr pipe which includes both pipes being from the right side exhaust manifold to the intake with the egr pedestal attached to them. good luck, keep me posted on your progress

Jan 07, 2015 | 2003 GMC Yukon XL

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Where is the egr valve on a 99 Ford expedition


The EGR valve is in a very difficult spot to work on. If the EGR is bad it will set off the check engine light and make the vehicle run rough or stall at idle. It really doesn't make it run rough while driving or accelerating. What are the conditions when the car runs rough?

Mar 01, 2014 | 1999 Ford Expedition

1 Answer

Egr vacuum at idle


See if the port going in to the intake from the egr is blocked, the port is big on the egr end and goes down in size and can clog.

Nov 18, 2011 | 1998 Lincoln Town Car

1 Answer

Have a 99 Saturn, rough idles, stalls, high RPMs when first started, then idles to rough idle, what is the first thing I check?


Sounds like the EGR is hanging open causing an internal vacuum leak.... Check all vacuum lines first for cracks / splits and then pull the EGR and make sure the pintle is not stuck open with a chunk of carbon.

Oct 15, 2010 | 1999 Saturn SL

1 Answer

Just replaced EGR hose & valve copver gaskets on 2002 Ford Escape 4WD. Did test drive, runs really rough & almost stops & cuts off. Any ideas?


OK, if you replaced the EGR hose, did you go all the way to change the EGR Valve? A stuck open EGR Valve can cause a rough idle and almost make it cut off.
Also, a vacuum leak on the EGR valve can cause a rough idle.

prev.gif next.gif Exhaust Gas Recirculation (EGR) Valve Removal & Installation 2.0L Zetec Engine NOTE: When the EGR tube is disconnected from the EGR valve, it must be discarded and a new EGR tube must be installed. The aluminum threads on the EGR valve must be inspected, and a new EGR valve installed if the threads are damaged.
To Remove:
  1. Disconnect the negative battery cable.
  2. Remove and discard the exhaust manifold-to-EGR tube. Use the following as a guide:
  3. Raise and safely support the vehicle
  4. Remove the splash shield
  5. Disconnect the EGR tube fitting
  6. Lower the vehicle
  7. Remove the air cleaner outlet pipe
  8. Disconnect the EGR tube from the EGR valve.
  9. Detach the vacuum line and remove the two retainer bolts.
NOTE: The EGR valve sealing surfaces are soft metals and easily damaged.
To Install:
  1. Installation is a reverse of the removal process. Carefully clean all sealing surfaces and install a new EGR valve gasket.
  2. Install a new EGR valve tube.
Detach the vacuum line (#1) and unbolt the EGR valve - 2.0L 02-04_escape_emissions_022.gif

3.0L (4v) Engine To Remove:
  1. Disconnect the vacuum line.
  2. Disconnect the EGR tube.
  3. Remove the EGR valve and discard the gasket.
NOTE: The EGR valve sealing surfaces are soft metals and easily damaged.
To Install:
  1. Installation is a reverse of the removal process. Carefully clean all sealing surfaces and install a new EGR valve gasket.
Detach the vacuum line (#1), unthread the EGR tube (#2) and remove the EGR valve bolts (#3) - 3.0L (4V) 02-04_escape_emissions_023.gif

Aug 02, 2010 | 2002 Ford Escape

1 Answer

My truck will ocasionally run like its running out of gas. It only happens when it is at normal temp and it will go away if i floor it. It is a 1985 Chevrolet K1500 with a small block 350. we recentaly...


Try pulling the vacuum line off the EGR valve when the engine is warm and idling rough. If the EGR is bad the engine will idle normal once you remove the vacuum line. It will be located on the intake manifold.

May 26, 2010 | 1985 Chevrolet Chevy

5 Answers

My 04 f150 had a rough idle and would sometimes stall out. dealer said it was throttle body so I replaced. The idle is still rough but it it doesn't stall. Could it be a coil pack? if so do I need to...


I have a 2005 f150,with a 4.6 and it idles rough and when you turn on the ac it wants to die. Checked the codes and there are no codes.Any suggestions?

Apr 30, 2010 | 2004 Ford F150

2 Answers

1997 Nissan Hardbody has rough idle/surges/stalls


ok i have the same truck my timing was off 3 teeth but mine wouldn't kick out of high idle is y mine was surging but know with timing right no vacuum leaks i cant get it below 1400 but when a vacuum turns on it almost kills my engine any thoughts i know i got a vacuum line mixed up idk were though

Mar 13, 2009 | 1997 Nissan Pickup

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