2002 Explorer 2WD tries to stall in gear when stopping with the A/C on. | Ford Explorer Forums - Serious Explorations

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2002 Explorer 2WD tries to stall in gear when stopping with the A/C on.


New Member
February 1, 2010
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City, State
sticks ga
Year, Model & Trim Level
2002 xls
My 2002 explorer stumbles and almost stalls when the a/c cycles on at a stop with the brakes on and still in gear. It idles fine when in neutral or park when the a/c cycles on. This only started after I changed sparkplugs. Could I have loosened at connection to the idle speed sensor or ac low pressure switch? Any Ideas?

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Welcome to this forum! I've renamed your thread, and moved it into the stock 2002-2005 section. Check your vacuum lines to see if a hose got unplugged. You might want to clean the IAC solenoid too.

IAC is the easiest to blame so check the hoses and elbow. check all your connections again, including the MAF sensor and any hoses that go to the air intake.

i'd say something happened when putting the new plugs in. Old and worn Spark plug boots can leak electrically causing all kinds of "stalling" issues.

Is it a 4.0 or 4.6L?

The 4.6L have the Coil on plug packs which have an electrical connector on the side. Check those side connectors. Most of mine had the plastic snap piece break off as i was unplugging them for the first time at 118K. Same for the fuel injector snaps. Were the boots dry or cracked? Did you add silicone grease to the boots? Use a good marine grade silicone like 3M for either the 4.0 or 4.6L engines. Add it to the side connectors on the coil packs too. This keeps out moisture and helps the boots go on the plug better. If its a 4.6L, also double check that the fuel injector connectors are back on properly since you more than likely had to disconnect them to get to the coils.

if it keeps wanting to stall, the check engine light will eventually come on and stay on.
when it does, take it to autozone or any other auto parts to the have them read the error codes and then search here for possible solutions.

Thanks for the tips. I haven't had time to check the items yet. Iknow my way around the a wrench but have very little eletrical skills or knowledge. What is an IAC Solenoid and what does it do? Thanks!! YGONE

this is out of left field, but I had a customer's 03 doing the same thing, ended up being the A/C compressor. Probably not a common issue(nobody I talk to ever heard of it) but just FYI.....was bad bearing in compressor.