[DML] Re: 911, engine running on 3 cylinders MORE INFO
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[DML] Re: 911, engine running on 3 cylinders MORE INFO



  Are you certain that only three plugs are getting spark?  The 
reasons I ask are:  The car should be almost undriveable on only 3 
cylinders.  The car could not have passed its emissions test while 
missfiring that badly, the HCs would have been far too high.  It's 
very unusual to lose exactly half of the firing events in this way.
  That said, I don't doubt that your test is correct.  Let's take it 
a step further.  Pull the spark plugs out of the cylinders that 
aren't running and take a good look at the ends.  Are they clean and 
dry?  Or, are they wet with fuel?  Carbon fouled?
Now put your old plugs back in (to plug the holes) and take a known 
good spark plug and stick it into the end of one of the plug wires, 
lay the plug against a metal part of the engine, someplace secure, 
and start the car. (with all the other plug wires installed) You 
should see a nice spark jumping the plug gap.  If not we'll have to 
look elsewhere.
You might pick up a spark tester from your local auto parts store, 
which will make this whole process much easier.  They can be had for 
less than $20 and look like a spark plug with a big alligator clamp 
hooked to it.  There are several other designs also.

Matt Smith



--- In dmcnews@xxxxxxxxxxxxxxx, "odell_andy" <odell_andy@xxxx> wrote:
>
> the distributor cap & spinning peg(?) are brand new, so are the 
leads.
> plugs all test good. the white/slate wire is connected to the
> distributor base. What would cause only the Left 3 plugs to fire?
> distributor cap is on correctly. all parts are from delorean 
specialists.
> any ideas? 
> 
> ps you would be amazed how well the engine runs on 3 cylinders. 
pretty
> slow to accelerate from 0-10mph, then picks up well.(doesnt like
> hills). i would prefer all 6 to work however. it has also just 
passed
> its emmissions test in this state.
> im not mistaken. to confirm i have pulled the 3 right hand leads off
> the spark plugs with the engine running.(don't try yourself!) it 
makes
> no difference to how the engine runs and sounds.
> 
> the new leads all test 3.3-3.5 ohms resistance. (also tested old 
set, 2.5)
>








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