Rough Running! CURED!!!

Rough Running! CURED!!!

Author
Discussion

DanEames

6 posts

115 months

Sunday 10th August 2014
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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

EGB

1,774 posts

156 months

Sunday 10th August 2014
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EGB said:
portzi said:
its the black plastic connector in the middle of the picture smile

mark



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.
Done it ok with a 19mm socket without breaking the plastic nut, relief! Soaked it over night with release fluid ATF/ Acetone mix.

Count Vampirski

151 posts

107 months

Friday 24th April 2015
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is this the same on the 4.3 Griff?
seems like xcessively rich fumes burning your eyes

EGB

1,774 posts

156 months

Friday 24th April 2015
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Replaced the relay on the ECU. Black socket in foot well. Much smoother now at low rpm. Relays get hot , don't last for ever.

PH430

147 posts

127 months

Friday 24th April 2015
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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


Edited by PH430 on Friday 24th April 20:38

caduceus

6,069 posts

265 months

Friday 24th April 2015
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M@H said:


I wish I could have seen that.. biggrin
There's a blast from the past. Hi Matt. Very very long time no see! Last time I saw you was when we were in a large convoy going to Chatsworth House many years ago (early 2000's), and we both went past the exit slip from some 'A' road hehe

Dr Mike Oxgreen

4,101 posts

164 months

Tuesday 9th June 2015
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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.

ClassiChimi

12,424 posts

148 months

Tuesday 9th June 2015
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I have Stepper/ mis fire issues,,, I'll change that sensor as a matter of course. Cheers Mike.

TV8

3,118 posts

174 months

Tuesday 9th June 2015
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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!


pb450

1,301 posts

159 months

Tuesday 9th June 2015
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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?

PRTVR

7,072 posts

220 months

Tuesday 9th June 2015
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If I remember right, there is a metal wire clip, pointy nose pliers to release.

67Fox

452 posts

110 months

Tuesday 9th June 2015
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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. smile

pb450

1,301 posts

159 months

Wednesday 10th June 2015
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Ooo-err... Don't remember seeing that. Will take a closer look. Thanks. thumbup

J400GED

1,202 posts

236 months

Wednesday 10th June 2015
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PRTVR said:
If I remember right, there is a metal wire clip, pointy nose pliers to release.
Yes it's a wire clip and the clip needs pushing in whilst lifting the switch off.




Hope this helps.

Ged


pb450

1,301 posts

159 months

Wednesday 10th June 2015
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Thanks Ged. I'll have a rummage. Two handed fiddley job then...

J400GED

1,202 posts

236 months

Wednesday 10th June 2015
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pb450 said:
Thanks Ged. I'll have a rummage. Two handed fiddley job then...
No, it's a one handed job to remove the plug. smile

Dr Mike Oxgreen

4,101 posts

164 months

Wednesday 10th June 2015
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I must admit, I just wiggled it and it came off!

I has occurred to me though, should I have used PTFE tape on the threads of the new sensor before I screwed it in?

J400GED

1,202 posts

236 months

Wednesday 10th June 2015
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Dr Mike Oxgreen said:
I must admit, I just wiggled it and it came off!

I has occurred to me though, should I have used PTFE tape on the threads of the new sensor before I screwed it in?
Is it leaking?

Dr Mike Oxgreen

4,101 posts

164 months

Wednesday 10th June 2015
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J400GED said:
Is it leaking?
It looks and feels dry, so I guess that's my answer - it'll be fine! smile

J400GED

1,202 posts

236 months

Wednesday 10th June 2015
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Dr Mike Oxgreen said:
It looks and feels dry, so I guess that's my answer - it'll be fine! smile
thumbup