desperate w126 owner

[kieroncashin]

hi im a new member to forum. ihave a w126 1986 500sel with running problems. i have owned it for 9 years. my car was laid up for a year.put new battery,points,plugs,leads,distributor and electronic coil pack on. then it was running but not quite right [slight miss at idle then slight missing at various speeds but some times running perfect] then it would cut out on idle or on motorway [deadly] also wont start some times.i changed fuel pump relay [eurocarparts] seemed to be okay for short while. now much worse. cant trust it to go/start anywhere. spent thousands on body,etc. getting to stage of setting fire to it. running out of money and patience. any advice gratefully accepted.

ps. sunroof leaking. how do i stop it/clean drain holes. thank you in advance for any advice/help.when these cars run right their the best drive ever

 

[grober]

Transistorised ignition unit on the way out? or possible old/dirty/wet fuel?

 

[jaymanek]

OVP relay? Has your car got ASR (traction control)

 

[kieroncashin]

thanks for reply.whats ovp. no asr .

 

[grober]

OVP =overvoltage protection relay---- lots of posts about faulty ones--- do a forum search for detailed info.