I need help SES light!!

I have a 99 T/A A4 with a few bolt ons, predator prog, 3.73 gears. My problem is an SES light that comes on at idle. It starts idling real rough and almost dies, it throws two codes every time i stop for 15 secs or more, p0270 (fuel trim bank2 too lean), and p0300(random multi cyl. misfire) Has anyone had this problem?

what are yer bolt ons some of those might be the problem

I have a 99 T/A A4 with a few bolt ons, predator prog, 3.73 gears. My problem is an SES light that comes on at idle. It starts idling real rough and almost dies, it throws two codes every time i stop for 15 secs or more, p0270 (fuel trim bank2 too lean), and p0300(random multi cyl. misfire) Has anyone had this problem?


What cylinder is mis-firing? that should tell you. Have you swapped plugs/wires lately?

The lean code...does it say bank 2 sensor 1(or 2)?

You might not have a plug wire put on all the way, or left one off. I did that one and got an SES light with misfires right aways. As far as the lean..not sure. Maybe a bad sensor...swap it out with the other sensor on that side

Hey man ive had this problem before...Check the wires are they touching? if they are there is your problem because mine was fixed after i untouched the wires. Tell me if it works.

As for the lean problem that could have something to do with Mass air flow sensor. Have you unhooked it? More HP but leans out the motor. As for the idle plug wires are a great start but also check your fuel filter I know a GM guy who swears that a clogged filter causes more problems than anything else.

[QUOTE=99onI95]As for the lean problem that could have something to do with Mass air flow sensor. Have you unhooked it? More HP but leans out the motor.QUOTE]


so if the engine gets to lean it will wanna quit running right???

ya it will want to start breaking things such as rods and pistions.