Re: what would a bad fuel accumulator do?

[DMCVegas@xxxx]

The purpose of the fuel acumulator is to maintain pressure within the 
fuel system to keep gasoline in the lines from vaporizing. The extra, 
soft hose that's connected from the accumulator to the return line is 
only used when the accumulator goes bad. If the seals inside the case 
break, then the extra hose directs fuel to the gas tank rather then 
letting it spill onto the ground. Symptoms of a defective accumulator 
would be hard starting when warm, but not when cold. It does indeed 
sound like you have a restriction somewhere in you fuel system.

The Volvo repair manual for the 760 K-Jetronic system indicates that 
your idle and starting problems are likely the result of incorrect 
fuel pressure. You have already determined that you fuel pressure is 
too high. It may be possible the the injectors are allowing too much 
fuel to enter the cylinders. More fuel then the engine can burn off. 
But first correct the pressure issue.

The DeLorean workshop manual states that excessivly high fuel line 
pressure is caused by a restriction in the fuel RETURN system. But 
you don't know exactly where the leak was comming from. Most likely 
the cause of the leak was the soft hose that connects from the 
accumulator to the return hose. If this was the case, then a leak 
there would make sense because this hose is not designed for high 
pressure. Based upon this assessment, I would say the restriction 
lies in your return line somewhere between the center of the chassis 
and the fuel tank. But before you even touch the car, make sure you 
know for a fact where the leak was comming from. Work backwards thru 
the system to find the cause, and always twist your theories to suit 
the facts, but not the other way around.

Good luck!

-Robert
vin 6585



--- In dmcnews@xxxx, Soma576@xxxx wrote:
> Hello guys,
> 
> as a summary, my symptoms are:
> 1. hard starting when cold
> 2. somewhat hard starting when warm, but MUCH easier
> 3. engine dies sometimes even after being warm
> 4. RPM's flow from 1000 to 500 when idling. as it approaches 500 
every time, 
> the engine nearly quits but it surges back up like it should.
> 5. extremely high fuel pressure - over 100 psi, probably closer to 
130 or 
> greater.

> [Non-text portions of this message have been removed]