Rough Running! CURED!!!
Discussion
HI EGB,
I can only go on my experience but I managed to remove the old one with a ring spanner and a few expletives.
The 19mm socket, it needs to be quite a deep socket, made it an absolute breeze. I bought one at the motor factors for less than £5 which was money well spent.
I would think that if someone changed it in the past and used thread lock rather than thread sealant that could cause problems. If the sensor is faulty I don't know what options you have but to try. I reckon I must have inhaled more than £5 of unburnt fuel in the last few weeks, so for less than £15 and 15 minutes it seemed worth doing.
Good luck if you go for it.
Dan
I can only go on my experience but I managed to remove the old one with a ring spanner and a few expletives.
The 19mm socket, it needs to be quite a deep socket, made it an absolute breeze. I bought one at the motor factors for less than £5 which was money well spent.
I would think that if someone changed it in the past and used thread lock rather than thread sealant that could cause problems. If the sensor is faulty I don't know what options you have but to try. I reckon I must have inhaled more than £5 of unburnt fuel in the last few weeks, so for less than £15 and 15 minutes it seemed worth doing.
Good luck if you go for it.
Dan
EGB said:
portzi said:
This looks like the one with the plastic 19mm nut. Have read this can break in bits on removal and it then becomes a big big pain. Anybody found a way of removing without breaking the d.....m thing.Its not always the sensor. Air in the Cooling system can also lead to rich running. This sensor is in the highest point of cooling system.
My Chim 4.3 had bad kangerooing. After mounted a full inductionkit of ACT ( K&N, inductionhose set, carbon trumpets and insulation gasket between plenumbase and inlet manifold) the kangerooing disapeard. The most important that there is no airleak after the AFM. A slight airleak gives a roughe running and pops and bangs in the exhaust when you are deselarate
My Chim 4.3 had bad kangerooing. After mounted a full inductionkit of ACT ( K&N, inductionhose set, carbon trumpets and insulation gasket between plenumbase and inlet manifold) the kangerooing disapeard. The most important that there is no airleak after the AFM. A slight airleak gives a roughe running and pops and bangs in the exhaust when you are deselarate
Edited by PH430 on Friday 24th April 20:38
I've just replaced my coolant temp sensor as well. In recent months, the engine has been running very rich after a cold start, with at least one cylinder being late to join the party and for at least half a mile it has been rather cantankerous and threatening to stall.
Changing the sensor is fairly easy if you can get a spanner in there - I bought a 19mm deep socket but it didn't fit over the plastic body of the electrical connector, so didn't reach the brass nut. But I managed with an ordinary spanner and a bit of swearing instead. I perhaps lost a teaspoonful of coolant, but that's all.
The engine now immediately settles to a nice smooth idle from cold with all eight firing properly, and doesn't feel like it's trying to stall when you touch the throttle. There was no significant smell of fuel. The throttle response and driveability is far better, especially when cold, but even when fully warmed up the engine pulls more smoothly: I hadn't realised that there was a subtle hesitation in the low- to mid-range. It will be interesting to see if I notice any change in fuel economy as well.
So to anyone experiencing running issues, especially if you suspect it's running too rich when cold, I'd strongly suggest that replacing this sensor should be high on your list of things to try.
Changing the sensor is fairly easy if you can get a spanner in there - I bought a 19mm deep socket but it didn't fit over the plastic body of the electrical connector, so didn't reach the brass nut. But I managed with an ordinary spanner and a bit of swearing instead. I perhaps lost a teaspoonful of coolant, but that's all.
The engine now immediately settles to a nice smooth idle from cold with all eight firing properly, and doesn't feel like it's trying to stall when you touch the throttle. There was no significant smell of fuel. The throttle response and driveability is far better, especially when cold, but even when fully warmed up the engine pulls more smoothly: I hadn't realised that there was a subtle hesitation in the low- to mid-range. It will be interesting to see if I notice any change in fuel economy as well.
So to anyone experiencing running issues, especially if you suspect it's running too rich when cold, I'd strongly suggest that replacing this sensor should be high on your list of things to try.
Late last year, my year, my car developed a very strong appetite for petrol to the point that I stopped filling it up as the number of miles per tankful was depressing.
As well as changing a couple of things electrical/ignition related, I tried one of the "Lucas" sensors from a local motor factors a few months back. It needed lots of PTFE tape to seal tightly and made no difference, so changed back.
Sardonicus recommended a brass mounted temp sender on another thread and the difference was very noticeable. Well over 200 miles out of a tankful now based on mixed and local driving. That may not sound like a lot to some but the car has bigger injectors, AFM and is one of the larger rover v8s out there. Very pleased!
As well as changing a couple of things electrical/ignition related, I tried one of the "Lucas" sensors from a local motor factors a few months back. It needed lots of PTFE tape to seal tightly and made no difference, so changed back.
Sardonicus recommended a brass mounted temp sender on another thread and the difference was very noticeable. Well over 200 miles out of a tankful now based on mixed and local driving. That may not sound like a lot to some but the car has bigger injectors, AFM and is one of the larger rover v8s out there. Very pleased!
pb450 said:
Numpty question: How does the plastic connector with the wires secure to this switch? Tried pulling gingerly but it didn't release easily. Didn't want to break anything so left alone. Is it a simple push fit or do you need to squeeze, push or prod a particular part of it first?
Yep It's like PRTVR said. It's a little metal clip. same as the injectors. Gassing Station | Chimaera | Top of Page | What's New | My Stuff