Re: [DML] rough running and gas

[dherv10@xxxx]

Sean, The fuel system is like a football team playing. All have to be there 
and working properly to make the play. If you take all the team players in 
the fuel injection system and line them up from the fuel screen to the 
injector, then what your looking for is the weak link or the trouble part out 
if the several players in between. The fuel injection system is comprised of 
many players. The injectors are mechanical with no adjustment ( linemen and 
told what to do). The only thing that opens the injectors is fuel pressure 
and the fuel flowing to them via the control plunger in the fuel distributor 
which is adjusted up or down by the air low meter and the control pressure 
regulator. This is a very balanced system and to often the injectors are 
looked upon to be the problem but there not. They open and close as told. 
There are several things in the fuel system which effect the pressure. Weak 
fuel pump, clogged up filter, mis adjusted pressure regulator, gas lines 
crimped, bad gaskets in the fuel distributor and I'm sure other thing but 
most of the time would be the adjustment of the air flow sensor plate. If the 
02 sensor is operating correct and the control plunger isn't sticking and as 
best you can't tell the pressure is ok, Then adjust the air flow sensor 
plate. This would be my 1st thing to do after analizing the system.
One thing about cars being stored, If stablizer isn't used and it becomes 
time to crank it up a little varnish could have formed and a can of B12 run 
thru the gas may unstick the parts. The control plunger would be the main 
unit. 
I have several books and articles on the K Jetronic system. It's not hard to 
understand the system but all the players have to be right.
John hervey
www.specialtauto.com