Idle Rough on 1994 Ford Explorer

We just replaced the mass flow air sensor and the purge flow solenoid in our 94 explorer. Before changing the mass flow air sensor the truck would run with it unpluged, but plugged in it skipped and spuddered real bad. The purge solenoid was broken on one of the vaccum hose ends, so that was replaced. It is still running rough with these changes. Not near as bad but still rough. Any suggestions?

by in Middleburg, FL on October 23, 2010
1 answer 1 comment
ANSWER by on October 23, 2010
If it was a "reconditioned" air flow meter I have seen poor quality air flow meters fail right out of the box. You will need to look for a vacuum leak failing ignition component or fuel issue responsible for the poor running. Do you have a workshop manual? Autozone have some popular workshop manuals for free on line once you register (for free) on their website or there is a company that independent auto repair shops "buy" their information from that offer a very reasonable service to do it yourselvers. You can get a one week subscription or year subscription very cheap. The information is year make and model specific repair procedures, service bulletins, component locations, wiring diagrams ect.... great quality information same as the professionals have ,much better than generic workshop manuals from parts stores, much cheaper than the factory manual try and get an online repair manual subscription.
COMMENT by on October 24, 2010
Thanks for the quick response. The mass air flow sensor was reconditioned but it doesn't appear that the purge flow solenoid is. I am not sure which part you are reffering to. There is a vaccum leak some where we can hear it, but have been unable to find it. I am actually on my way back to the parts store now, I bought new plugs and wire, but my gauge only goes up th .045 and I need .054, So I am hoping that will make a difference. I will order the manual online when I return. Thanks, Patti
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