Steve940Estate
New member
- Joined
- May 17, 2007
- Location
- Hampshire, England
Hello
I'm stumped my 1995 940 turbo is misbehaving and I really don't know what's causing it. I have just finished swapping the engine and gearbox plus any associated bits to make my car a manual turbo (it was non turbo auto before).
From cold (overnight) the car apears to run ok. I do about 30 miles at motorway speed, then a short distance at varying speed then leave the car for 7 hours. When I restart the car it idles higher than normal and when driving seems to misfire slightly. This seems to clear as it warms up. I do the 30 miles on the motorway and when I get off the idle is high and only seems to go back down when I sit stationary for a while (normally on the driveway).
I have gone through all the things I can find suggested on here.
I have taken off the throttle body and cleaned it thoroughly and re-set the throttle position switch, that didn't work so I swapped it. This hasn't helped either. I have cleaned the idle control valve and swapped that for another one but things are the same.
I am pretty sure there aren't any vacuum leaks as the pipes are new, I have recently replaced the manifold gasket and injector seals.
Not sure what to do next. Because the problem seems to be temperature related in some ways I wonder if it might be a temperature sensor, although I have read about speed sensor (speedometer) problems as well.
I would be grateful for any suggestions, perhaps the symptoms sound familar.
As I'm in the UK I will have to go to bed in a while, it's 11:30 pm and I've got to be up at 5:30am, but I will be back on here again tomorrow.
Thanks in advance if anyone can help.
Steve.
I'm stumped my 1995 940 turbo is misbehaving and I really don't know what's causing it. I have just finished swapping the engine and gearbox plus any associated bits to make my car a manual turbo (it was non turbo auto before).
From cold (overnight) the car apears to run ok. I do about 30 miles at motorway speed, then a short distance at varying speed then leave the car for 7 hours. When I restart the car it idles higher than normal and when driving seems to misfire slightly. This seems to clear as it warms up. I do the 30 miles on the motorway and when I get off the idle is high and only seems to go back down when I sit stationary for a while (normally on the driveway).
I have gone through all the things I can find suggested on here.
I have taken off the throttle body and cleaned it thoroughly and re-set the throttle position switch, that didn't work so I swapped it. This hasn't helped either. I have cleaned the idle control valve and swapped that for another one but things are the same.
I am pretty sure there aren't any vacuum leaks as the pipes are new, I have recently replaced the manifold gasket and injector seals.
Not sure what to do next. Because the problem seems to be temperature related in some ways I wonder if it might be a temperature sensor, although I have read about speed sensor (speedometer) problems as well.
I would be grateful for any suggestions, perhaps the symptoms sound familar.
As I'm in the UK I will have to go to bed in a while, it's 11:30 pm and I've got to be up at 5:30am, but I will be back on here again tomorrow.
Thanks in advance if anyone can help.
Steve.