Re: [DMCForum] Re: My first tune up

[Ryan Wright <ryanpwright@xxxxxxxxx>]

The surging actually bothers the heck out of me. It's a major surging,
coming up from ~750rpms to ~1500, then back down to ~750 every 2
seconds or so. When it comes back down, sometimes it tries to die.

I think the co is technically correct where it's set now. According to
the dwell meter it is, anyway. When I dial it up as above the lambda
system gives up and stops regulating things. I think I'm going to have
to tear the fuel system apart and find out what's up... or give up and
take it to a volvo mechanic.

-Ryan

On 2/5/06, Joe OBrien <joeyoseppijoe@xxxxxxxxx> wrote:
> Selection # 3
>
> 3. Dial it up ~3/4 turn from #1: Car seems to have a lot more power!
> Engine sounds beautiful. Still surges +/- 500rpm at idle.
>
> Well, I've seen numerous Deloreans tuned this way, or st least idle
> this way warm or cold.
>
> Does it bother you about the surging at idle?
>
> And apparently the car runs even better as you say.
>
> Try it for a while this way for awhile.
>
>
> -Joe
>
>
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> --- In DMCForum@xxxxxxxxxxxxxxx, Ryan Wright <ryanpwright@...> wrote:
> >
> > Joe,
> >
> > I think the problem is the previous owner or his mechanic dialed it
> > way lean. Here's what I get:
> >
> > 1. Where it's at when I bought the car: Car seems to run fine but does
> > a "glug glug" on deceleration.
> >
> > 2. Dial it up ~1/4 turn: Glug-glug goes away. Car surges +/- 500rpm
> at idle.
> >
> > 3. Dial it up ~3/4 turn from #1: Car seems to have a lot more power!
> > Engine sounds beautiful. Still surges +/- 500rpm at idle.
> >
> > Right now, it's back where it was when I bought the car - running
> > lean. I need to get the idle ECU working but I don't know how - O2
> > sensor is fine, ECU has power, but it doesn't regulate the idle speed
> > - dwell meter sits in the middle and never moves.
> >
> > -Ryan
> >
> > On 2/4/06, Joe OBrien <joeyoseppijoe@...> wrote:
> > > 1/4 of a turn sounds like way to much. When you reached the surgin at
> > > idle, you should have turned it just 1 click richer.
> > >
> > > Basically find a happy medium between 1/4 and where you started from.
> > > It is surprisingly sensitive.
> > >
> > > Best of luck.
> > >
> > > -Joe
> > >
> > >
> > >
> > >
> > > --- In DMCForum@xxxxxxxxxxxxxxx, Ryan Wright <ryanpwright@> wrote:
> > > >
> > > > I've pulled the transmission twice but have yet to perform a tune-up
> > > > beyond replacing the plugs, etc. That's lame, so now I'm
> attempting to
> > > > perform my first real tune up on my DeLorean.
> > > >
> > > > I just need some help. :-)
> > > >
> > > > The diagnostic socket now works (thanks to Dave Delman; connection
> > > > underneath was unplugged & damaged as you suggested). Dwell meter
> > > > shows a steady position when cold, as it should. Unfortunately, once
> > > > the car warms up, the dwell meter still shows a steady position. I
> > > > tried running a ground from the ECU to the engine block as suggested
> > > > here (http://mysite.verizon.net/vze7u0gn/id6.html), but it didn't
> > > > help. I'm fairly certain I can hear the frequency valve buzzing.
> > > >
> > > > Now what do I do?
> > > >
> > > > Second piece of information to this puzzle: I started this quest
> > > > because of a lean condition causing a "glug glug" noise on
> > > > deceleration. Working blind since my dwell meter wasn't swinging
> back
> > > > and forth, I dialed the mixture up 1/4 of a turn anyway. This fixed
> > > > (!) the glug glug noise, but unfortunately caused the engine to
> begin
> > > > surging up and down fairly significantly at idle - so I put the
> > > > mixture back where it was.
> > > >
> > > > From here, I have no idea where to go. Any advice would be greatly
> > > appreciated.
> > > >
> > > > -Ryan
> > > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > Yahoo! Groups Links
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
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> Yahoo! Groups Links
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