Last post on Feb 28, 2012 at 3:42 AM
You are in the Ford Windstar
What is this discussion about?
Ford Windstar, Engine, Fuel Efficiency (MPG), Fuel System, Van
#1 of 3 Too lean bank 1 +2 03 Windstar
Jun 27, 2011 (9:01 am)
I've got an 03 Windstar I recently bought, has 140,000 miles on it. Every few weeks, it'll throw out the error code for too lean bank 1 + 2. I'll clear it, then a few weeks later it'll pop up again. When it the check engine light does come on, it usually occurs while idling at a light and it'll run rough for maybe 30 seconds then run fine.
I've replaced the MAF + Fuel Filter + Air Filter. (Fuel filter was still the original and very clogged). I've run fuel injector cleaner twice now through it. Had the dealership check for vacuum leaks (none found). I have noticed in the past few weeks my MPG go down drastically in the city. Before I was averaging 17-19 and now I'm getting 13-19 in the city. So, I'm thinking maybe its a fuel delivery problem? Maybe something it just starting to go but it hasnt yet? I've ordered a new fuel pressure regulator which I'm going to put in this week...
I'm just confused because its driving fine, and this only happens once every few weeks. Any ideas?
#2 of 3 too lean bank 1 and 2
Aug 06, 2011 (5:10 am)
Try replacing the pcv valve. About 20 bucks at Ford and its super easy. If all else fails, might be the O2 sensors.
#3 of 3 Re: Too lean bank 1 +2 03 Windstar [gkaiser124]
Feb 28, 2012 (3:42 am)
By now i hope you have this fixed. I found this trying to get this worked out on my 03 i did fuel and air filter. The problem turned out to be spark.