Starting

[Gs George]

Hi my 1990 W126 was always bad starting from cold then I lost power to the fuel pump.But still got sparks cleaned and warmed plugs Reinstated fuel pump power by a simple direct battery connection but still really bad starting after much cranking I give up. Fired a coupla times but did not burst into life.I have located the fuel pump relay.Where is the ovp fuse n relay? the temp sender? crank sensor is I asume is at the front.All this started after I fitted a new water pump.How does the cold start work does it electrically squirt fuel into the inlet manifold it was running OK before when it was warm but tickover always rough n lumpy maybe rotor dissy cap required All helpful comments much appreciated.

 

[television]

If this started as soon as you replaced the pump,the crankshaft sensor is very close.

http://www.detali.ru/cat/oem_mb2.as...&L=765.706&CT=M&cat=505&SID=15&SGR=090&SGN=05

Something lose on the connections ?


You should not run wires to the pump without taking out the fuel pump relay, further damage can be incurred by doing this.

Malcolm

 

[lepton]

The OVP relay is on the bulkhead, just in front of the windscreen, to the left of the battery. It is a vertical block about 5cm high and 2.5cm wide. It is bolted to a metal plate which must be unscrewed before unplugging the relay. The original relay has a single fuse on top, the replacement has been modified and has a second fuse. Costs about £55.

Alan