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once more
Posted by saab86 [Email] (more from saab86) on Tue, 4 Mar 2008 16:26:26
In Reply to: Re: CIS too rich at speed, saab86, Tue, 4 Mar 2008 16:16:25
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one more piece of info: http://www.users.bigpond.com/INTERJECT/KJETRON.HTM
THE MOMENT YOU switch the engine off while the FLOW and PRESSURE GAUGE is connected in series between the fuel distributor and fuel pump pressure side, the gauge will drop to a resting point. In most cases it is a reading above 200 kpa or 2 bar. Never less! This is caused as the system regulator valve shuts approximately at 4.2 Bar. However, a bleed off of fuel via the warm up regulator will bring the resting pressure to 3 Bar or a minimum of 2.2 Bar as the compression spring in the warm up regulator shuts off the inlet piping. This causes resting pressure in the fuel distributor. If p check for a system leak. INJECTORS ARE THE LAST TO BLAME FOR LEAKS, so please remember. Injectors in K-JETRONIC play the role strictly of DEPRESSURISING VALVES, that's all they are !! For total system pressure loss, there are only 2 main items to check.
1. The check valve or one way valve in the fuel pump is faulty.
2. The 'O' ring on the system pressure relief valve is leaking.
Secondary checks:
1. Fuel line is leaking somewhere on joints.
2. The fuel accumulator diaphragm has a small pin hole and is dribbling out from the safety discharge pipe
posted by 209.197.159...
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