[DMCForum] Re: Three brass screws (Please help, I broke my car)

["content22207" <brobertson@xxxxxxxxxxxx>]

Relax and take a deep breath...

Those brass screws don't do much more than you can also accomplish by
simply cracking open the throttle plates. They do allow you to
precisely adjust airflow to each bank (cracking throttle plates does
not). But then again neither does the idle speed motor...

FYI: function of the screws --
Closest to air sensor plate: Lets air into the circuit
Middle: Balances driver bank (4-6)
Farthest from air sensor plate: Balances passenger bank (1-3)

Sounds as if your idle speed motor, or ECU, is DOA. They do that.

Why don't you close the brass screw closest to the air sensor plate
(at which point the other two have no effect) and get your engine to
run by cracking the throttle plates. Last I checked Louie Golden was
idling that way. I do so too, but I've got a carb. Use the lower set
screw to open them. Don't forget to adjust your idle microswith screw
correspondingly if you've still got the vacuum advance solenoid.

Bill Robertson
#5939

>--- In DMCForum@xxxxxxxxxxxxxxx, "ryanpwright" <yahoo1@xxxx> wrote:
> It started out innocently enough: I wanted to do a tune up. So I
> bought plugs, wires cap & rotor from one of our DeLorean vendors and
> replaced them tonight. In doing so, I bumped those brass idle screws a
> little. Not much, maybe 1/8 to 1/4 turn at most, but I bumped the back
> two. I tried to put them back as best as I could.
> 
> My car won't run now. Fires right up, starts to settle into idle and
> dies. The brass screws had already been opened by the previous owner,
> so at this point I decided to play with them. Tried closing them,
> tried various open positions. Some let the car run for 3 seconds.
> Others for 1 second. 
> 
> Then I closed them back down and the rear one just sheared right off.
> I didn't use force in tightening it, but it broke anyway. It's all the
> way closed and I can't adjust it anymore. Can a machine shop drill it
> out? What should I do?
> 
> Please help. I'm lost.
> 
> Notes: 
> 
> - All fuel lines and plug wires are correct. I labeled and
> triple-checked everything when I did the tune up.
> 
> - The car was getting too much fuel when I bought it, I think. It went
> "blubBlubBlubBlub" when you let off the gas. I was hoping to fix this
> with the tune up, but now that it doesn't stay running for more than 3
> seconds...
> 
> -Ryan

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