Ok, I need help!

[pharow]

My car has been having some really bad misses and bogging at high RPM's lately. As I know of, it is not a fuel problem. I got a CEL a few times and a code 1221. I did the checks for the O2 sensor, and it was bad. I ordered a new one...got it this past week. I got it on the car, and it ran better for a few days.

Well, today while I was coming back from an out of town trip. I got the same misses and bogging, CEL, and code 1221. I dont know what else to check. Can some one please help guide me in the right direction? I don't know where to look next.

THANKS IN ADVANCE!

[jlevie]

1221 is a Lambda fault. While it can be caused by a bad O2, it more commonly triggered by an upset in the A/F ratio. Since the code appears in conjunction with missing, the chances of it being cause by an A/F upset are pretty good.

The most likely causes of this hat high rpm are a bad AFM or a fuel delivery issue. Run the fuel system pressure and delivery test in the Bentley. If they appear to be okay with the car stationary, clip a fuel pressure gauge to a wiper and see what happens at speed.

[pharow]

ok thanx. i will check tht out

[pharow]

Ok the fuel press. drops off when the car is warm, and I'm giving it some gas.

[Cabriolet]

pull a vacuum on the on the fuel pressure regulator. see if that fixes(could be bad hose)
next fuel filter needs to be replaced.
last fuel pump.

[pharow]

Brand new fuel filter. I put on yesterday.
It's a new hose on the FPR. On both sides of the FPR. It is a fairly new FPR, but I had replaced it b4 I knew I had a clogged return line in the gas tank. Should I try another new FPR, and if that does not work a new fuel pump?

[jlevie]

The first action should be to run the fuel system tests in the Bentley. If there is a problem with the fuel system those tests will tell you where the problem is.

[pharow]

Ok, thank you sir.

[pharow]

Ok I need a part number for the fuel pump. Just the pump. Not the whole assy.

[jlevie]

The OE pump is only available as a complete assembly.

[pharow]

Got a Walbro fuel pump on order. I am hoping, wishing, crossing fingers, and praying that this fixes my problem!

[pharow]

FIXED! Fuel pump was bad. Walbro 255lph fixed it right up. Thanks r3v for all the help!