[DML] Re: New parts don't ALWAYS make your car run better...

["dukeofclassiccars" <tswatch@xxxxxxxx>]

I had the same probalem until just last night.  I replaced 
craked/missing vacuum hoses and the car just wanted to die after a 
few seconds.  I found that my oxygen sensor was bad.  Just something 
else you might want to check.

~Dan

--- In dmcnews@xxxxxxxxxxxxxxx, "supermattthehero" <supermatty@xxxx> 
wrote:
> Dear DMC Troubleshooting Experts,
> 
> Recently I purchased a bunch of parts from the various vendors to 
do 
> a BIG tune-up.  This involved replacing all of the vacuum hoses, 
new 
> ported vacuum switch, cleaning the fuel injectors (ultrasonically), 
> new injectors seals, installing the auto-coolant bleeder, pulling 
> the intake manifold to clean up the 'valley', install new spark 
> plugs, new heater pipe, new MSD Blaster2 ignition coil, new intake 
> manifold o-rings, calibrating the throttle and idle speed switch, 
> and general overall cleaning.  Whew!  So, all of the above has 
> already been done.  
> 
> Let me take a step back for a moment, prior to this, my car was 
> running very well, or so I thought.  Then I started to read the DML 
> more, and started to find little things.  Namely, the three brass 
> screws were all turned open, there was no tamper-plug or plug of 
any 
> kind on my fuel distributor, and there was some sputtering 
> when 'revving' the engine.  Many of the vacuum hoses were dry and 
> cracked.  So, I installed all of the above parts, and closed all 
> three brass screws.  This leads me to where I am today...
> 
> Now that all of these vacuum leaks are taken care of, (or atleast I 
> think they are) my car starts, runs for about 10 seconds, and then 
> when the RPMS begin to settle down it either idles VERY rough or 
> stalls.  The exhaust is awfully foul smelling.  Now I won't lie to 
> you, the gas in the tank is probably 6 months old, and 93 (yes, I 
> know now that it's wrong and I should be using 87) octane.  But 
> anyway, the last interesting tidbit is that, if I take some tape or 
> whatever and put it in where the 'tamper-proof plug' should go, the 
> car will behave the way I just mentioned above, however it will be 
> accompanied by visible black smoke.  Removing the plug makes the 
> black smoke go away.  
> 
> Now, I also have a new oxygen sensor waiting to be installed, but I 
> wanted to wait until I got some fresh gas in the car first, in fear 
> of ruining it.  Call me dumb, but could this be a case where I need 
> to adjust the mixture screw?  
> 
> thanks,
> 
> Matt
> #1604




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