Starting problems
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Starting problems



Ok so here's my first post on a problem I am experiencing on my D 
after trying to start it after 4 years. 

I should start off with the following: I replaced the Fuel pump, 
accumulator and Fuel filter. I emptied out the tank and cleaned it 
out (although it was pretty clean to begin with). I had had the frame 
off the car and taken all of the fuel lines off and blew them out 
with shop air. I took the fuel distributor off the car and 
gently/carefully removed the center metering pin and cleaned out the 
fuel distributor. I had also rebuilt the entire engine myself and set 
all the timing and such to spec. I installed everything, put about 5 
gallons of gas into my tank along with Stabil gas stabilizer. I have 
all 3 new fuel hoses and they are connected correctly and routed 
properly. The new fuel filter is not threaded onto the 90 degree 
elbow to tight to cut off fuel restriction. Fuel pressure from the 
hose coming off of the fuel filter to the distributor is running sort 
of like a garden hose. My cold start valve and frequency valve are 
working and my warm up regulator is not blocked up. I have had the 
injectors tested and cleaned by Rob like a year ago and they have 
been stored safely in a dry location until the other day I put them 
into the engine.

Now here is the problem:
I tried to start the engine and it just sputtered and died. After it 
sputtered and died I tried to start it again but this time it seems 
that only one cylinder is firing since after every revolution I hear 
one firing. With the help of Nick Pitello I took out some of the 
injectors and jump the fuel pump, nothing was spraying out of them. 
We then began to adjust the CO and still nothing. Nick them tapped 
the side of the injectors with the plastic side of a screwdriver and 
it began to spray properly! We then tried it with another injector 
that wasn't working and it too started to work. We installed the 
injectors back into the engine (after only doing three of them) and 
tried to start the car. Well it began to start but very ROUGH and it 
idled for like 4 secs and then died. After a few seconds we tried to 
start the car and the problem returned (one cylinder only firing). We 
took out the same injectors and this time they were intermittently 
working.

Now here is my question: First I should say I do not have a fuel 
system pressure tester to test the pressure of my system (anyone want 
to lend me one for a day? :)) Could I have a pressure problem? Like I 
said before when the system is set up normally and I try to crank 
it..only one cylinder fires. The sputtering in the beginning is most 
likely due to the fuel in the intake manifold from the cold start 
valve. Could it be that my fuel injectors are bad? How could I test 
them at home to see if they are bad? Is 5 gallons of fuel enough for 
testing? I didn't want to fill the tank up incase I had to get into 
the tank again for any reason.

I have dealt with loads of electronic injectors (MPI,TBI,etc) but 
this is my first with the Bosch setup. 

Any suggestions welcomed and appreciated

Thanks,
Steve Rubano








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