Re: [DMCForum] Re: My first tune up

[Ryan Wright <ryanpwright@xxxxxxxxx>]

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@xxxxxxxxx> 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
> >
>
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> Yahoo! Groups Links
>
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