2003 Ford Explorer Q&A
2003 Ford Explorer Question: Vacuum leak
Pinch off all vacuum hoses with a pliers. If any changes occurs, it could be a leak. One particular area that is comon for these vehicle is the intake manifold gaskets. A propane method is a sure way of detection, but monitoring the O2 sensors is desired when doing so. The manifold gaskets usually are more prone to leak during cold starts. - Brian Glastetter
My 1992 Ford Explorer XLT 4dr 4wd Auto 4.0 V6 has begun suddenly running rough and the check engine light comes on. It happened after I replaced the O2 sensor, when I was reaching behind the engine...
The intake manifold O-ring gaskets commonly leak, causing stalling and poor idle quality; the Check Engine Light will illuminate.
We have check plugs, plug wires, altenator, and changed battery. It idles fine in park and when you put it in gear but as soon as you push the gas peddle it boggs and it almost acts as if it is mis...
EXPLORER RUN GOOD MAYBE GAS CAP, OR RE CHECK VACUUM LINES,SHOULD I CHANGE THE DOWN STREAM O2 SENCER, PLEASE HELP
The idle is rough, but smooths out and runs fine while driving. O2 sensors have been replaced also.