Mac Cool wrote:
> Mechanic read the code and told me I have a lean fuel condition.
>
> He recommended changing the fuel filter, adding injector cleaner to a tank
> of gas and cleaning the mass air flow. I've done those things and still
> have the problem. The mechanic suggested replacing the MAF which is a $400
> + part. Anything else I can try first?
Let's start with this. Has it been tested with a wide band oxygen
sensor to validate that it's running lean, or are you just trusting the
oxygen sensors? Could be you have a bad oxygen sensor. If you recently
installed a new oxygen sensor, did you reset the EEC? If not, the EEC
may have adapted for the poor sensor and it takes a while to re-learn.
You might try pulling the battery cables off and let it sit for a while
so that the EEC will try and re-learn it's tables.
If still showing lean after re-learning, try running it with the MAF
disconnected. The EEC will use it's previous learning to guess and
while it'll run poorly, see if it still shows lean.
If you have a chassis dyno shop in town (check dynojet's website or
mustang dyno's website for information on folks that have them.) they
usually have wide band sensors and for $50-$80 you can strap down on
the dyno and do a couple runs with the wide band sensor connected.
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