Variable and lumpy idling. - Page 3

Laird Scooby · Jan 9th, 2018, 13:14

Quote:

Originally Posted by Delta66

I removed the idle control valve, cleaned it with carb cleaner, replaced and the the running is less lumpy and the idle revs now sit about 900 rpm. The valve looked clean, but quite a lot of crud came out.

I cannot find what is the correct idle revs for the 2.3 lpt. Anyone know?

Assuming it's the same as the B230ET fitted to the 740, it should be 900rpm.

Delta66 · Jan 9th, 2018, 13:21

In that case, I appear to have sorted the problem. The engine shaking that I do not remember being there before, probably was, I did not notice it until the lumpy idling also appeared.

Thanks.

Laird Scooby · Jan 9th, 2018, 13:24

The engine is shaking now?

Delta66 · Jan 9th, 2018, 16:09

Shaking as in vibrating, but not excessively. I cannot remember how much the engine vibrated before the lumpy idling. At idle it is enough to make the car feel like it is vibrating as well. But open the bonnet and the engine is just vibrating about as I would expect. I think that part may just me noticing it for the first time.

A 4 cylinder 2.3 litre is never going to be the smoothest of engines.

mjk164 · Jan 9th, 2018, 17:37

Are the engine mountings OK?

Delta66 · Jan 10th, 2018, 09:30

Yes and looking at a few you tube videos of engines running, mine is fine. I think I will clean the MAF sensor, is electrical contact cleaner OK, or should I buy the specialist MAF cleaner?

Laird Scooby · Jan 10th, 2018, 10:26

Contact cleaner is probably no good at all for cleaning the MAF as most contain a lubricant. This lubricant will carbonise on the wire putting the carbon back on you've just cleaned off!

I used carb cleaner on mine, disconnected the engine side hose first, sprayed it into the air passage, refitted the engine side hose, removed the air filter side hose and sprayed the air passage from that end as well.

Delta66 · Jan 30th, 2018, 12:24

The mass airflow sensor was cleaned with Halfords electrical contact cleaner and the lumpiness has gone.

I had to remove the end of a pipe to the turbo to then take off the air filter cover and unbolt the MAF from that. Why not have the bolts go the other way?

It was quite mucky inside the pipe and the wire mesh covers were very dirty.

Delta66 · Jan 31st, 2018, 20:46

Well, it ran beautifully smoothly, once and then today, total refusal to start. I took out the MAF again and a tiny bit of black plastic came out. It was very dirty, so something was maybe dislodged.

I am going with it is now gubbed. New one ordered off ebay for £46, rated seller, 40 MAFs already sold and feedback is fine for the other ones. Its not Bosch, but the numbers match.

Delta66 · Feb 2nd, 2018, 12:38

Changed the MAS and nothing. Car will not start. Is this a coincidence or can changing the MAS cause an issue elsewhere?

Car turns over fine and it has almost started a couple of times.

Jan 9th, 2018, 13:24	#23
Laird Scooby Premier Member Last Online: Yesterday 21:06 Join Date: May 2012 Location: Lakenheath	The engine is shaking now? __________________ Cheers Dave Next Door to Top-Gun with a Honda CR-V & S Type Jag Volvo gone but not forgotten........

Jan 10th, 2018, 10:26	#27
Laird Scooby Premier Member Last Online: Yesterday 21:06 Join Date: May 2012 Location: Lakenheath	Contact cleaner is probably no good at all for cleaning the MAF as most contain a lubricant. This lubricant will carbonise on the wire putting the carbon back on you've just cleaned off! I used carb cleaner on mine, disconnected the engine side hose first, sprayed it into the air passage, refitted the engine side hose, removed the air filter side hose and sprayed the air passage from that end as well. __________________ Cheers Dave Next Door to Top-Gun with a Honda CR-V & S Type Jag Volvo gone but not forgotten........

Jan 9th, 2018, 13:21	#22
Delta66 Senior Member Last Online: Feb 23rd, 2020 19:46 Join Date: Oct 2015 Location: Erskine	In that case, I appear to have sorted the problem. The engine shaking that I do not remember being there before, probably was, I did not notice it until the lumpy idling also appeared. Thanks.

Jan 9th, 2018, 16:09	#24
Delta66 Senior Member Last Online: Feb 23rd, 2020 19:46 Join Date: Oct 2015 Location: Erskine	Shaking as in vibrating, but not excessively. I cannot remember how much the engine vibrated before the lumpy idling. At idle it is enough to make the car feel like it is vibrating as well. But open the bonnet and the engine is just vibrating about as I would expect. I think that part may just me noticing it for the first time. A 4 cylinder 2.3 litre is never going to be the smoothest of engines.

Jan 9th, 2018, 17:37	#25
mjk164 VOC Member Last Online: Apr 12th, 2024 13:08 Join Date: Aug 2006 Location: Hounslow West London	Are the engine mountings OK?

Jan 10th, 2018, 09:30	#26
Delta66 Senior Member Last Online: Feb 23rd, 2020 19:46 Join Date: Oct 2015 Location: Erskine	Yes and looking at a few you tube videos of engines running, mine is fine. I think I will clean the MAF sensor, is electrical contact cleaner OK, or should I buy the specialist MAF cleaner?

Jan 30th, 2018, 12:24	#28
Delta66 Senior Member Last Online: Feb 23rd, 2020 19:46 Join Date: Oct 2015 Location: Erskine	The mass airflow sensor was cleaned with Halfords electrical contact cleaner and the lumpiness has gone. I had to remove the end of a pipe to the turbo to then take off the air filter cover and unbolt the MAF from that. Why not have the bolts go the other way? It was quite mucky inside the pipe and the wire mesh covers were very dirty.

Jan 31st, 2018, 20:46	#29
Delta66 Senior Member Last Online: Feb 23rd, 2020 19:46 Join Date: Oct 2015 Location: Erskine	Well, it ran beautifully smoothly, once and then today, total refusal to start. I took out the MAF again and a tiny bit of black plastic came out. It was very dirty, so something was maybe dislodged. I am going with it is now gubbed. New one ordered off ebay for £46, rated seller, 40 MAFs already sold and feedback is fine for the other ones. Its not Bosch, but the numbers match.

Feb 2nd, 2018, 12:38	#30
Delta66 Senior Member Last Online: Feb 23rd, 2020 19:46 Join Date: Oct 2015 Location: Erskine	Changed the MAS and nothing. Car will not start. Is this a coincidence or can changing the MAS cause an issue elsewhere? Car turns over fine and it has almost started a couple of times.

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