Mb2 bogging down, now fixed!

[skitzma8]

I am still chasing the problem that's making my mb2 hesitate and bog down at 4000 to 6500rpm, but when it passes 6500rpm it gives a last little push to the red line, the car is fine when I'm driving at low speeds but I still have to feather the accelerator peddle to stop it bogging down. Today I took the standard air filter off and put a cone one on. and it seemed to run slightly better but still bogging down, and I'm still getting p0171 system too lean. I really need this sorting out asap

[skitzma8]

Have you checked the plugs since or was it doing it before you changed any parts

It was still doing it before I changed any parts mate, I have changed out the iridium plugs for ngk originals, didn't help one bit and every morning the car seems harder to start, like today when it took a good cranking over and finally started and revved streight to red line with out one misfire then bogged down streight away after that.

[KiNK43]

Have you tried a different ecu?

[skitzma8]

Have you tried a different ecu?

no I haven't tried another ecu yet, I'll give it a go

[skitzma8]

I'm 90% sure it's fuel related because that's what the engine seems to be lacking, the old fuel filter was filthy when the left over petrol came out. Also there was some while stuff in it that looked abit like silicone, I take it to change the fuel pump it's a tank out job?

[Krzys]

Not sure about tank out, I think you can get to it from under the rear seat.

[skitzma8]

Not sure about tank out, I think you can get to it from under the rear seat.

I've had a look under seats and can only find the float, carnt fund the fuel pump

[skitzma8]

tank out.

oh no not really what I wanted to hear thanks Tom lol

[skitzma8]

The car doesn't have a resonator or a cat, but I doubt that would be the issue as other members would have the same problem?

[Krzys]

If the CAT was the problem the code you pulled would have said so mate. 

 

I think in some D series the CAT is part of the manifold too.

[skitzma8]

If the CAT was the problem the code you pulled would have said so mate.

I think in some D series the CAT is part of the manifold too.

that's what I thought but some old mechanic I know said that because my lil 1.4 is decated both of the O2 sensors could be giving mixed readings, thus making the engine throw the p0171 engine too lean bank 1 code. I also fitted a resonator box in today and it made a difference, I really am starting to think it could be the de-cat.