Date registered: Jun 2004
Mentioned: 1 Post(s)
Quoted: 17 Post(s)
You're in Brissy?,firstly ,is it the injection pump or the Fuel supply pump under the car?.If it 's the supply pump,what is wrong? is it pumping or not?.
The injectioon pump is a high precison item which believe me hardly ever gives trouble unless it's been interfered with.
Three Point servicesc in Mount gravatt are the only mercedes people in Queensland with the expertise and tolls to work on those pumps.
The injectors are supplied pressure from the injection pump.
The fuel; supply pump sends fuel from the tank to the injection pump which pressurises it.
There some Rules which you must stICk too when working on Mercedes MFI systems.First rule.NEVER LET THE LOCAL HOLDEN OR FORD MECHANIC ANY WHERE NEAR YOUR CAR!!!!!
THEY KNOW NOTHING!!!.
2ND RULE.Start with the Ignition.it must be perfect.no ifs or buts,aim for perfection.
3RD RULE. Check compression. it must be a minimum of 150 PSI for the engine to even run half decent.
4TH RULE. Adjust the valves correctly on a COLD engine. Check the timing chain,any wear at all means time to replace it.Worn chains mean the engine will never run efficiently.
5TH RULE. the fuel filter must be replaced at least every two years.
6TH RULE. the pump is supplied from the bottom of the tank,replace both those hoses comming from the tank,remove the bung in ther center of the tank and get the filter in there cleaned ultrasonically.make absolutely sure the top smaller line is clear by shoving a wire through it.They rust up causing injection problems.
7TH RULE. The Pump MUST supply 3.3 liters in 1 minute AT THE COLD START INJECTOR. Any less and the car will never run right . delivery pressure is around 7 PSI. ignition on and engine NOT running.
toomuch pressure means a blockage in the return line to the tankl.in all probability you missed the blocked return pipe in the tank or didn't replace the rubber fuel lines and one has collapsed inside.
8TH RULE.For 100 liters of fuel add 1 liter of autotrans fluid to the fuel.it contains cleaning agents which keep the MFI free of moisture and varnish ( THIS ADVICE FROM DAIMLER CHRYSLER THEMSELVES ) .
9TH RULE .If the MFI pump has the dip stick,unscrew it and check if the oil is overfull,if so drain it out by sucking the excess oil with a plastic.
10th rule. Ensure that all the linkages are tight and you have no loose ball joints anywhere and that the throttle is colsing completely and not open when in idle positon.Idle is NOT governed by the throttle .