[DML] Re: Frustrated beyond belief

["David Teitelbaum" <jtrealty@xxxxxxxxxxx>]

Logic would say that vacuum leaks would lean out the mixture. Once you
start touching things you will overrichen the mixture to compensate so
now it IS running rich WITH THE VACUUM LEAKS! Just because you put all
those nice, new parts in doesn't automatically fix things. You could
have installed them wrong or knocked something else loose. You need to
go over all of your work again. Another pair of eyes may see something
you missed. You could have injectors that are leaking or have a messed
up spray pattern. It still sounds like vacuum leaks but now you have
overrichened the mixture to get it to run with all the "false air"
getting past the air sensor. Some hard to see vacuum leaks are the
fuel injector seals, the big vacuum hose that goes to the brake
booster, the tube that goes into the bottom of the mixture unit that
feeds the idle motor, the plug over the mixture screw, and the two
knock-out plugs on the front of the intake manifold. You could have a
leaking cold start valve. On a car I worked on the "O" ring was
missing under the cold start valve and it was a large leak. I also
worked on a car where the bolt holding the wires on the front, left
intake manifold was too long. It bent the knock-out plug under it so
it leaked. On another the "O" ring on the idle tube was not held in
place by the brass ring because it was all bent up. You have to go
over everything very carefully. In many cases it is not one leak but
the culmination of many, small ones. Attention to detail will fix them
all. Recheck your firing order too. You may have to remove and clean
your spark plugs once you get all your vacuum leaks under control.
David teitelbaum
vin 10757


--- In dmcnews@xxxxxxxxxxxxxxx, Phil Priestley <phil@xxxx> wrote:
> 
> Been trying to get this #$*%@! car drivable for  months now. If it's 
> not been one thing it's been another.  Had the heads fixed after 
> coolant had eaten through them. It ran well afterwards but had an 
> engine miss.
> 
> The rpm relay went out, replaced that. The frequency valve stopped 
> working, put a new one in. Put in a new Lambda probe. Cleaned and 
> gapped the plugs. Put a new set of plug wires and  cap in. cleaned the 
> contacts and grounds for everything. Car also has a new CPR, fuel pump, 
> fuel accumulator, idle speed motor, idle speed micro switch, new vacuum 
> hoses, thermal lambda probe, thermal vacuum switch, compression is good 
>








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