fuel problem

[codyman3487]

check engine light has been on for almost a year now it says its running lean... i changed the fuel pump fuel filter the fuel strainer checked the mass air flow sensor its ok check the injectors there ok what else am i missing please help thanks

[Ldub]

Prolly intake gaskets...:_wrench:

Or other un metered air entering through cracked/loose vacuum lines etc.

Get out there under the hood with a can of starting fluid (ether) or other VERY flammable spray can (carb cleaner being another), & spray here & there around the engine...like under the intake, by the injectors, etc.

Listen for an increase in idle speed.

:luck:, & be careful playing with flammable stuff...:yesgray:

[fildigger]

Good call with the easy start fluid sprayed around both intake manifolds (they are prone to letting go!!!)

I assume you have had it on the Diag' tool ?...why leave it for a year?..guess it can't be to bad if it is still running acceptably for you....although running lean is never a wise thing for long term reliability :(

[Y33TREKker]

what else am i missing please help thanks
Fuel pressure regulator? It's relatively cheap and easy enough to replace anyway, so that might be worth a try too.

[samneil2000]

You say you checked the mass airflow sensor. How did you check it? Mine was running lean and I fixed it by pulling the MA sensor and spraying it thoroughly with MAF cleaner on both sides. Just a thought.