Date registered: Mar 2015
Vehicle: 1989 W124 260E
Location: Kidderminster in Worcestershire
Mentioned: 2 Post(s)
Quoted: 161 Post(s)
Might be your crank position sensor get it checked with a multi meter for ohm.They can cut out with the change of heat
Or the fuel pump relay ,,to sort this, and to eliminate the relay pull the relay out [ difficult ] i use two plastic drifts the relay will have lugs on that clip in to the plastic type cradle at the rear of battery. Once you removed it you can then wire 7 and 8 pins of the relay together , and refit .
After you do this it will operate the pump all the time,, so only use it to rule out if the relay is the problem ,then remove the link from 7 and 8 pins right away . Dont use it with the link in place on the FPR .
And one more thing- if it is a m103 lump you can have condensation in the rear of the distributor cap the cap will need removing another fiddly job but they are on our type of engines, now at the rear is a disc with a seal that stops condensation from entering the distributor from the rear . Next time it is like this , open bonnet in the dark and look for blue flashing on the ht circuit that could be your fault . All this information is for the M103 12 valve .So may not be the same for your engine .Its best to point out in your post engine type .