|
700/900 Series General Forum for the Volvo 740, 760, 780, 940, 960 & S/V90 cars |
Information |
|
Variable and lumpy idling.Views : 2351 Replies : 42Users Viewing This Thread : |
|
Thread Tools | Display Modes |
Jan 9th, 2018, 13:14 | #21 | |
Premier Member
Last Online: Yesterday 21:06
Join Date: May 2012
Location: Lakenheath
|
Quote:
__________________
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 |
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, 13:24 | #23 |
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 9th, 2018, 16:09 | #24 |
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 |
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 |
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 10th, 2018, 10:26 | #27 |
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........ |
The Following 2 Users Say Thank You to Laird Scooby For This Useful Post: |
Jan 30th, 2018, 12:24 | #28 |
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 |
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. |
The Following User Says Thank You to Delta66 For This Useful Post: |
Feb 2nd, 2018, 12:38 | #30 |
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. |
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests) | |
|
|