Re: Fuel Mixture unit Gasket Leak?

["jtrealtywebspannet" <jtrealty@xxxx>]

The symptoms you describe could be caused by a vacuum leak. Since 
there are so many possible sources of vacuum leaks plug off everything 
and sort them out one by one. Start with a THOURGH visual inspection 
especially where things are hard to see like on the front of the motor 
and under the intake manifold.
David Teitelbaum
vin 10757


--- In dmcnews@xxxx, "pbartusek" <pbmain@xxxx> wrote:
> Had a question for the group...
> 
> How common is it for there to be a leak in the gasket that goes 
> between the lower housing of the fuel mixture housing and the 
> throttle valve assembly? 
> 
> The reason I ask is that my car was running ok, with the exception 
of 
> some issues I posted on last fall where the car would be going fine 
> down the highway, but when I released the gas for a moment and then 
> accellerated again, the car would just start dropping speed. It 
> seemed as if backing off the accelerator would help a bit, but the 
> car wouldn't go above 55, and I'd have to do some quick lane changes 
> as everyone here in Detroit wanted to speed by...
> 
> I decided a tune up couldn't hurt the situation, but then the 
> nightmare really began - after new spark plugs/wires/cap/rotor, 
> (taking off the two bolts and pulling up on the mixture unit to get 
> clearance to get the distributor cap off, and the car ran like 
> complete garbage. Couldn't go above 25. I looked and looked for 
any 
> sign of a vaccum leak, disconnected wires, etc. Nothing that I 
could 
> spot. I started replacing the replaced parts, with the old parts 
that 
> at least would let the car run good enough to drive around town, and 
> still the same symptoms. The car sat through the winter in the 
> garage, and now when I went to turn it on, it won't start - unless 
> you give it gas right away and keep it above 1000rpm. No longer 
does 
> it sit at the nice fast idle, then back off after a couple minutes. 

> You just have to kick in the gas or else it won't even be close to 
> staying alive, and the word idle is not a part of this car's 
> functionality any longer! If you floor the pedal, it won't go above 
> 1000 or 2000 or wherever you have it - it just sounds starts 
> sputtering. If you back off the accelerator a bit, it zooms up in 
> RPM very fast. If you accellerate more gradually, it will rise, but 
> usually sounds a bit rough in doing so...Took the plugs out - all 
are 
> equally alike - dull black. 
> 
> I'm kind of stuck at this point that I'm not sure if I should be 
> chasing fuel system issues, vacuum issues, distributor, etc... The 
> obvious answer seems to be 'retrace your steps, you screwed 
something 
> up', but I've gone over distributor cap wire routing, replaced the 
> new parts with old and back again, trying to find the mysterious 
> variable that's causing the problems, but I just seem to be getting 
> more problems without reducing the number of variables!
> 
> Any suggestions on testing vaccum, fuel pressure, or any other 
common 
> Delorean troubleshooting steps for something like this are greatly 
> appreciated...
> Pete Bartusek
> #6707