My 1995 Ford Explorer runs ok until I turn on my heating/cooling system. Then Rpm's drop from 600 to 100. When I put the truck into gear the RPM's come up to about 300 and the vehicle surges then RPM's drop and it's safe for me to move forward. This vehicle starts and revs nicely when cold but warm starts present the above problem. I've had my heater blower motor replaced since the system cut out totally but that hasn't solved the surging and low rpm problem. I have to keep the heat and a/c off.
Any idea s anyone?
Thank-you,
L.Hamilton
Check your EGR or your Idle control Valve. This can cause a problem with your irratic idling
When you put your AC or heater on it puts a strain on your motor and will make your motor run about 35 to 50 more RPM. The heater especially draws air from the heat of your engine and if your EGR is saying your engine is not hot enough it will cause these problems. I know it seems wierd but it is true.
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My engine idles up and down ,it gets better as it warms up but still very bad
Try replacing the I A C
http://schematicsdiagram.blogspot.com/2011/12/how-to-adjust-rpm-on-2009-dodge-charger.html
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Engine cuts out at 3000 RPM?
http://schematicsdiagram.blogspot.com/2011/12/engine-cuts-out-at-3000-rpm.html
---------
Cold start problem and vehicle shudder around 2500 to
3500 rpms
http://repairhelpcenter.blogspot.com/2012/10/cold-start-problem-and-vehicle-shudder.html
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High rpm in neutral? Inconsistant high RPM in neutral?
http://technoanswers.blogspot.in/2012/02/high-rpm-in-neutral-inconsistant-high.html
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Jetski
Sputters and Low RPM?
http://whatisbyme.blogspot.in/2012/07/jetski-sputters-and-low-rpm.html
--------
Fuel
Injection Problem And RPM suddenly increases
http://whatisbyme.blogspot.in/2012/07/fuel-injection-problem-and-rpm-suddenly.html
----------
2005 Toyota Highlander: Engine runs hard RPM
below 3000?
http://whatisbyme.blogspot.in/2012/05/2005-toyota-highlander-engine-runs-hard.html
---------
1987 Toyota Camry: RPM Drops going Up hills?
http://whatisbyme.blogspot.in/2012/05/1987-toyota-camry-rpm-drops-going-up.html
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Cruise
Control stops working, Excessive cranks to start the engine and RPM goes max
2500
http://whoisbyme.blogspot.in/2012/07/cruise-control-stops-workingexcessive.html
----------
1990 Toyota 4Runner: Engine cuts off when
reaches 2000 RPM?
http://whatisbyme.blogspot.in/2012/05/1990-toyota-4runner-engine-cuts-off.html
------------
1999 Toyota Camry: Erratic stalling and high
engine RPM at idle?
http://whatisbyme.blogspot.in/2012/05/1999-toyota-camry-erratic-stalling-and.html
---------
1995 Toyota LS: Misfire at idle or low RPM
http://whatisbyme.blogspot.in/2012/04/1995-toyota-ls-misfire-at-idle-or-low.html
-----------
Lexus RX: Tapping noise under Valve Cover At Low RPM?
http://technoanswers.blogspot.in/2012/04/lexus-rx-tapping-noise-under-valve.html
----------
These will help.
Thanks.
http://schematicsdiagram.blogspot.com/2011/12/how-to-adjust-rpm-on-2009-dodge-charger.html
---------
Engine cuts out at 3000 RPM?http://schematicsdiagram.blogspot.com/2011/12/engine-cuts-out-at-3000-rpm.html
---------
Cold start problem and vehicle shudder around 2500 to 3500 rpms
http://repairhelpcenter.blogspot.com/2012/10/cold-start-problem-and-vehicle-shudder.html
---------
High rpm in neutral? Inconsistant high RPM in neutral?http://technoanswers.blogspot.in/2012/02/high-rpm-in-neutral-inconsistant-high.html
-----------
Jetski Sputters and Low RPM? http://whatisbyme.blogspot.in/2012/07/jetski-sputters-and-low-rpm.html
--------
Fuel Injection Problem And RPM suddenly increaseshttp://whatisbyme.blogspot.in/2012/07/fuel-injection-problem-and-rpm-suddenly.html
----------
2005 Toyota Highlander: Engine runs hard RPM below 3000?http://whatisbyme.blogspot.in/2012/05/2005-toyota-highlander-engine-runs-hard.html
---------
1987 Toyota Camry: RPM Drops going Up hills?http://whatisbyme.blogspot.in/2012/05/1987-toyota-camry-rpm-drops-going-up.html
-----------
Cruise Control stops working, Excessive cranks to start the engine and RPM goes max 2500 http://whoisbyme.blogspot.in/2012/07/cruise-control-stops-workingexcessive.html
----------
1990 Toyota 4Runner: Engine cuts off when reaches 2000 RPM?
http://whatisbyme.blogspot.in/2012/05/1990-toyota-4runner-engine-cuts-off.html
------------
1999 Toyota Camry: Erratic stalling and high engine RPM at idle?
http://whatisbyme.blogspot.in/2012/05/1999-toyota-camry-erratic-stalling-and.html
---------
1995 Toyota LS: Misfire at idle or low RPMhttp://whatisbyme.blogspot.in/2012/04/1995-toyota-ls-misfire-at-idle-or-low.html
-----------
Lexus RX: Tapping noise under Valve Cover At Low RPM?http://technoanswers.blogspot.in/2012/04/lexus-rx-tapping-noise-under-valve.html
----------
These will help.
Thanks.
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Can you tell me why my heating/cooling system seems to be involved?
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