My guess is fuel system . . . (archive)

A few years ago I bought a 320 that had been sitting for a while. Car drove fine for the first week or so, then started to bog down under load. Someone wiser than me suspected fuel, so we changed fuel filter and blew fuel lines clear. Car drove fine, then started to bog down again. More junk in the fuel system.

The un-scientific results: two fuel filters, blew lines clear three times and, finally, new fuel injectors (old ones had hard deposits in them).

I think it's just a matter of letting the fuel system flush it self out (with a little help).

Lee
323i

Recently developed an odd but serious lack of power. Feels like at 50% loss of power especially above about 3000rpm. Seems to be only affected during load (simply driving). Idles smooth, runs smooth, but no power. Flooring it seems to make it gasp for fuel as letting off actually helps. I don't think its ignition. I think its fuel - maybe pressure regulator. Fuel filter has about 150 miles on it as do several fuel lines. No pressure/vacuum in the tank noticed when removing the cap. Fuel is fresh though it was the same on the last tank. From a standing start everything seems fine then feeble power soon after. I bet it was max out at 60mph.
I'd like to attach a fuel pressure gauge but where and with what? How can I test the pressure regulator. What does it do anyway?

Peter S - new paint looks great, but now it won't go :(

Follow Ups:

Re: My guess is fuel system . . . Peter S 19:58 6/03/2001 (1)
- Re: My guess is fuel system . . . ljp 00:04 6/04/2001 (0)

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