I saw your response saying you had no codes. And you may have posted
this before, but have you checked compression? How about oil in water
and water in oil?
Quoting blade44m <zaphod44@earthlink.net>:
> Hey guys,
>
> After a few weeks of working on my new 405 Mi16's rough idle, I'm
> about to throw in the towel and take it somewhere. Several helpful
> listmembers have suggested various things to check, but I've done
> all I know how to do. The deal is that the car runs pretty darn good
> at speed. But at idle, it runs real rough, like it's on 2 or 3
> cylinders. It also pings at high engine speeds if I'm hard on the
> gas. Because of this, I haven't smogged it yet. Here is what I've
> done to the car, if you have any suggestions, please let me know!
>
> New plugs, plug wires, distributor cap and rotor. New O2 sensor. The
> fuel filter was temporarily eliminated to make sure it wasn't the
> problem. I sent out the injectors for cleaning. They came back and
> the flow rate/pattern is now perfect, according to the folks who did
> them.
>
> From my good running 405 AND my parts car, I have swapped in the
> following parts with no difference. Air box with air flow sensor,
> throttle position switch, idle control valve, coil, fuel pump, fuel
> pressure regulator.
>
> I purchased a fuel pressure tester. At idle, the fuel pressure is
> around 41 PSI. With the regulator unplugged, it goes up to 44. At
> part throttle, the fuel pressure is 35 PSI.
>
> If there are any last things I should check before I give up, please
> let me know! There's usually not much I can't fix on cars, but this
> one has me stumped. If I can't get her running this weekend, I'm
> going to take it to Cerrone's European (right near my work
> fortunately) during the week. If it comes down to that, I guess I'll
> just have to lie back and think about England and hope the bill
> isn't too high! Thanks all!
>
>
>
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Received on Sat Feb 16 15:24:25 2008
