Posted by Bob on October 24, 2007 at 15:10:40 from (69.178.229.154):
In Reply to: Re: code read posted by noidea on October 24, 2007 at 14:41:42:
If the engine shutdown solenoid seems to be operating with the key switch, don't worry about the fuel heater at this time.
Here's what you have... the lift pump brings fuel up to the DS4. The DS4 has a built-in pump that flows the fuel though the engine shutdown solenoid, and on to the "hydraulic head".
There are 4 pumping pistons in the "hydraulic head" that force the fuel to, and through, the injectors. The other solenoid, the "fuel solenoid" MUST be commanded CLOSED by the 'puter at the instant the 'puter wants EACH AND EVERY injection event to begin. If there are "sick" sensors, a sick 'puter, bad wiring, a bad fuel solenoid driver, or a bad fuel solenoid, it will NOT close, and the fuel pumped by the plungers for EACH injection event will be "wasted" back into the pump housing, rather than forced through the injectors.
So, ASSUMING you have fuel to the IP, the internal pump is working, and the engine shutdown solenoid is working, you have internal pump problems OR external wiring/'puter problems leading to that solenoid not closing, and forcing the IP to build up injection pressure.
Trouble codes:
13 - Engine Shutoff Solenoid Circuit
---We've discussed this.
17 - High Resolution Circuit Fault.
---The "high resolution sensor" is another name for the "optical encoder", as shown in my first photo.
18 - Pump cam reference pulse error.
---This tells the 'puter at what position of advance the little servo motor (NOT shown in the photo, it's on the backside, in that view) has positioned the cam ring deep inside the pump that operates the 4 plungers previously mentioned.
19 - crankshaft position reference error
----The crankshaft position sensor is inserted at the lower left of the engine front cover.
35 - injection pulse width error
----Pertains to the operation of the "fuel solenoid".
36 - injection pulse with error
----Pertains to the operation of the "fuel solenoid".
54 - PCM fuel circuit error
---The 'puter is "freaked out" as to what is going on in the fuel system.
NOTE... besides all the grounds, check the connections between the engine harness and the body harness at the upper back of the motor.
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