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200 Series General Forum for the Volvo 240 and 260 cars |
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MAF sensorViews : 3270 Replies : 22Users Viewing This Thread : |
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Apr 22nd, 2017, 11:29 | #11 | |
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Apr 22nd, 2017, 11:42 | #12 | |
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Pedant in operation. They get deposits, which is surely dirt, which should be burned off in response to a signal from the ecu....? If the burn off has not occurred or not been sufficient a cleaner may help remove that dirt? Thanks Clan. I am so not surprised that the cleaner often fails and ruins the sensor. So those cleaners are NOT a good maintence idea. Possibly useful as a desperate get home measure, if there is nothing left to lose? |
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Apr 22nd, 2017, 13:57 | #13 | |
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If you look at the components inside the tube you don't see any dirt on them ...There is a fine paper air filter cleaning the air before it goes through the air mass meter . The proper way to check them is to read out the voltage at idle which should be within the specifications and rev the engine and see the figure go up linearly .
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Apr 22nd, 2017, 14:52 | #14 | |
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That testing sounds at least a bit different from Haynes and Bentley. Is that testing method from an official Volvo dealer workshop procedure? Is the method and the specifications available please? I've heard of a "green book" online, somewhere. Is it in there please? |
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Apr 22nd, 2017, 15:56 | #15 | |
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( which it is ) The ref number for the manual is Technical Publication 32135/1 Section 2 ( 23 - 28 ) Engine management LH 2.4 LH 3.1 fuel ... EZK 116 Ignition 240 1989 - 1993 It covers : Fault tracing Design & Function Repair Maintenance regarding your 3 codes , 322 is the burn off signal missing , but this is caused by your code 121 = air mass signal faulty/missing . With the ignition on you should get 2.65 volts at pin 4 of the Air Mass Meter. 113 = Short term fuel trim signal fault , which is likely to be the lambda sensor . With the engine idling and hot , the voltage from the sensor on the rubber shrouded connector should vary regularly about once a second from 0.1 volts to 0.9 volts should swing up and down .... ... an analogue meter is best for reading this . Hope that helps ...
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Apr 24th, 2017, 17:16 | #16 |
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Hi,
I got a secondhand Bosch Air Mass Meter from a forum member. It came from a 940, but it was the same part number. Lots of them around. 80,000 miles later it was still working fine. |
Jun 9th, 2017, 15:23 | #17 | |
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My 240 has no current fault codes, I think you are giving that information for someone else. |
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Nov 8th, 2017, 15:07 | #18 | |
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TP 3136/1 ; 12.88 https://www.scribd.com/doc/126885359...anual-Complete EDIT: Be very careful re the monthly payment after the free trial. . . Last edited by Stephen Edwin; Nov 8th, 2017 at 15:34. |
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Nov 8th, 2017, 18:14 | #19 | |
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The Following User Says Thank You to Clan For This Useful Post: |
Nov 8th, 2017, 20:40 | #20 | |
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My impression is that it deserves reading and study before it is needed, so that if the info is needed one is not starting from scratch looking things up. So far my anti virus seems totally happy. Definitely be wary. And that download is only free if one remembers to cancel the subscription in time. Free downloads for 30 days. . |
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