J
jscpch
Guest
I see quite a number of misfire problems listed but wonder if any of the experts who obviously read this forum can help with mine!
I have a 1994 S280. Last year it suddenly began to rapidly increase and decrease revs when in normal tickover. Eventually, after a lot of investigations, the local Merc dealer (not a main agent) changed the plugs, air flow controller and the main engine wiring harness - quite a bill!!
It seemed to cure the problems but then I noticed that when at stop with my foot on the brake (eg traffic lights) the engine began to surge slightly and I often now slip it out of gear and re-engage when the lights change. I can live with that.
However, I live in an area of France which is as flat as a pancake where the car seems to run very well but, at the moment, I am on holiday in a very mountainous area of Spain and I am finding that the engine is struggling to go up steep slopes.
It pops, coughs and badly misfire going up steep hills but then runs without problem on the flat or on normal slopes. The steeper the hill the worse the misfire appears to get. Sometimes, if I decelerate when approaching a corner, then accelerate up a fairly gentle slope it also will cough a couple of times then smooth out and run well. There doesn't appear to be any problem if I simply accelerate very hard under normal conditions. It really struggles to get up eg a 1 in 4 (25%) hill
Can anyone please help? Thanks.
I have a 1994 S280. Last year it suddenly began to rapidly increase and decrease revs when in normal tickover. Eventually, after a lot of investigations, the local Merc dealer (not a main agent) changed the plugs, air flow controller and the main engine wiring harness - quite a bill!!
It seemed to cure the problems but then I noticed that when at stop with my foot on the brake (eg traffic lights) the engine began to surge slightly and I often now slip it out of gear and re-engage when the lights change. I can live with that.
However, I live in an area of France which is as flat as a pancake where the car seems to run very well but, at the moment, I am on holiday in a very mountainous area of Spain and I am finding that the engine is struggling to go up steep slopes.
It pops, coughs and badly misfire going up steep hills but then runs without problem on the flat or on normal slopes. The steeper the hill the worse the misfire appears to get. Sometimes, if I decelerate when approaching a corner, then accelerate up a fairly gentle slope it also will cough a couple of times then smooth out and run well. There doesn't appear to be any problem if I simply accelerate very hard under normal conditions. It really struggles to get up eg a 1 in 4 (25%) hill
Can anyone please help? Thanks.
