1 have a 1990 300e straight six i have replaced just about everthing to do with ignition system been to two garages paid a fortune and still have the same problem and you never know when the car will just lose spark everybody is stumped at my expense ive almost spent as much trying to fix the car as i did buying the car i have posted many treads over the last two weeks at a friends advice and had alot o looks but no help is ther any member of this site that thinks they could help please i need help

 

Classic symptoms of a failing fuel pump relay. I haven't read all your posts - have you replaced this? These little black boxes do a lot more than just control fuel delivery. Hence the price

 

i have fuel pressure i dont have spark you mean to tell me that relay will kill the spark please explain

 

Hi,

Hmmm - have you changed the OVP relay?

It is behind the battery and ECU.

If you have not changed it then do so.

 

i have replaced it and crank sen,

 

by the way you can take fuel pump relay out and i still have spark thanks anyway

 

Give some more details about your problems. Does it hesitate when you step on the accelerator (Gas Pedal)?

 

it dosent it will just die and i will have no spark

 

I would then start inspecting every wire and connection. I would pull each component from its socket and clean all connections, and disconnect ever wire connection and clean them. While in my hand, I would check as much of the actual wiring as I could. Grounds in particular.And I'd pull every fuse and clean all those connections - the fuses do corrode where they contact their connection.

 

How did you know you do not have any spark? Have you physically check if you are getting current through your spark plug wires when you start the engine?