Quote Originally Posted by fitdrive View Post
Guys, id like to ask for comments / reactions regarding our Ford suv.

It has rough idle / vibrations only when car as at stop or idle, but once i step on accelerator, no problems. No lag or power loss.

I already changed the fuel filter. Before, the fuel filter was changed, mas grabe ang rough idling. So I assumed it was dirty gasoline. Now, we had 3 refills of Petron Blaze. No more ethanol muna,





The rough idling subsided but meron pa din. And usually it happens pagka puno ng fuel tank at least 1st half, but when the gauge enters less than half, wala na yun rough idle hanggat mag-empty ang fuel tank, and then after full tank ulit, andun na naman.

I had it obd scanned (generic scanner, not Ford), during rough idling no Error Codes. Ang napansin ko lang during rough idle, sobrang amoy gasolina sa labas, at times it smells like burning rubber. I figure it maybe the emission sensors, like for example 02 sensors, pero no error codes. Pero yun nga parang the engine is running rich pag may rough idle, at medyo bagsak ang FC niya.


And here's one more thing, pag ayaw tumigil ang rough idle, i just remove the battery to force the system to reset the ECU. For 2 days, ookey sya, then balik sya ulit, basta whenever th gas tank is more than half full.

Sobrang gulo na po, pero ang labo talaga. Im planning to do an ecu reflash soon. Di kaya ecu na ito, corrupted or something.

Other things that planning to do before the reflash: (mahal kse

- Clean IAC valves
- Clean fuel injectors

have the evaporative emission systems checked. your charcoal canister might be overloaded (saturated with liquid gasoline. this usually triggers a DTC P0440-failed evaporative emissions system