[smolck]

First of all, greetings to all from Spain. This will be my first post on the forum, after finding it very useful for a long time.

The reason for it is that I have lately been feeling my 2001 330Ci to be slower that it's supposed to. Timed a few 0-60 runs and it is giving me a consistent result around 10seconds.

Spark plugs are new, oil and filter too. Just bought a fuel system cleaner to see if I notice any difference. Next on my checklist will be air filter, fuel filter, and if that doesn't get me close to 6 I'll go for the pump. After that, I'll check O2 sensors. That's the plan.

Do any of you guys have an idea of what could be so wrong that is taking 4 seconds out of a 0-60(dont say the driver, I'm not that lame . Any other ideas?

I live in Madrid, with an elevation of 2000ft and daily Temps of around 86F. I guess that plays a role, could it be such a big one?

Thanks a lot guys.
Sergio

Does your car burn oil? I had a ZHP that got beat in a race by a 300k mike 323i auto! I was mortified. After replacing plugs, MAF, fuel filter, fuel pump, coil packs, 02 sensors, cam/crank sensors I was still not any better off. Then I installed eBay headers......come to find out my cats were 80% clogged. All the oil my ZHP burned had fouled the cats. After the headers the car went from losing to an auto 323 to a 5.7ish 0 to 60. It was a monster (relatively speaking). That’s my guess. Good luck!

 

[smolck]

If the car has clogged cats, it absolutely will slow the car down substantially. In my case the headers eliminated the problem and that’s why I enjoyed the results I did. But even if you put replacemeant cats on it, if they aren’t clogged then it bring it back to normal power levels. Also, my car had NO CODES, so a DME scan won’t always show the problem.