[DML] Injectors

["dmc12rb" <rbrogren@xxxxxxx>]

What should the correct fuel pressure be (at the injectors)?  

About 800 miles ago I had the injectors in my D cleaned/tested by one 
of the vendors. (This was done at the same time I replaced the water 
pump and the car has not run the same since then. Horrendous gas 
mileage, a popping sound in the exhaust and poor acceleration.)
 
I have cleaned the injectors in a ultrasound cleaner, using a Techron 
concentrate. While testing them after the cleaning I occasionally 
notice an incomplete spray pattern when blowing compressed air 
through them. Changing the pressure appears to have an effect and I 
am curious about the cause.
 
My test method is far from scientific, using compressed air and a 
makeshift contraption to connect it to the injector. It appears that 
I need about 70 PSI to get anything through the injectors. Does 
anybody know of a reasonably priced spray pattern tester or have any 
other suggestions? (Yes, I know that I can have them cleaned and 
tested by a vendor again -- or buy a new set for about $500, but I 
would like to know if I have an injector problem or not before I take 
that step.)
 
Roger
VIN1074 





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