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S40 / V40 '96-'04 General Forum for the Volvo S40 and V40 (Classic) Series from 1995-2004. |
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For your viewing pleasure my lumpy running V40Views : 7008 Replies : 47Users Viewing This Thread : |
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Jan 4th, 2014, 09:31 | #11 |
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Jan 4th, 2014, 12:13 | #12 |
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Yeah Alex it very very rarely makes and difference unpluggin the VVT solenoid, i just managed to catch it this time, thanks guys, I'm off to do some more cleaning in the rain
Thanks Malteser !
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London, UK Current Car - 1999 T4 V40 Ph1 66k AKA "Heather" My Previous Car: V40 2.0T 2000 Volvo V40 2.0T (B4204T3) |
Jan 4th, 2014, 12:24 | #13 |
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http://i.imgur.com/QnKxwd8.png
Which sensor am i looking for number 1, 11 or both ? I thinking to remove it and clean it/them because there may be remnants of oil gunk in the water system from when my oil cooler failed and leaked oil into the water. I will give the cooling system another flush too.
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London, UK Current Car - 1999 T4 V40 Ph1 66k AKA "Heather" My Previous Car: V40 2.0T 2000 Volvo V40 2.0T (B4204T3) Last edited by CTCNetwork; Jan 4th, 2014 at 13:03. Reason: Image too big - removed bbcode |
Jan 4th, 2014, 12:34 | #14 |
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The above diagram is for the GDI car cars.
See DWM's excellent guide here: http://www.volvoforums.org.uk/showthread.php?t=136848
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Current car: 2002 S40 1.9D, 1992 240SE Nullius in Verba
Last edited by gatos; Jan 4th, 2014 at 12:46. |
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Jan 4th, 2014, 13:26 | #15 | |
New V40 Owner
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Quote:
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London, UK Current Car - 1999 T4 V40 Ph1 66k AKA "Heather" My Previous Car: V40 2.0T 2000 Volvo V40 2.0T (B4204T3) |
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Jan 4th, 2014, 13:48 | #16 |
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If you can get it on vida look at freeze frame data and live data especially coolant temp and fuel trims at idle and load can reveal a lot about what is going on.
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Jan 4th, 2014, 13:58 | #17 |
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Thanks KBB, I would have to take a trip back to Gatos' to do that and in its current state i don't think it will make it that far without a lot of risk breaking down entirely so i'll have to try the other suggestions first and hope i get some improvements.
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London, UK Current Car - 1999 T4 V40 Ph1 66k AKA "Heather" My Previous Car: V40 2.0T 2000 Volvo V40 2.0T (B4204T3) |
Jan 4th, 2014, 13:59 | #18 | |
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I will be going to Heathrow next Sunday, so I could pass by and try again with my VIDA
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Current car: 2002 S40 1.9D, 1992 240SE Nullius in Verba
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Jan 4th, 2014, 15:12 | #19 |
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In live data select for graphing mode ECT, MAF, Long term fuel trim(LTFT) Short term fuel trim (STFT), ignition timing and throttle position value.
Long term fuel trim should be close to 0 it is expressed as a +-%, its a measure of how much the ECU has had to correct baseline fuel injection. If you see a value of +20% then the correction factor has been 20% more fuel injected than the ECUs base line calculation from the various input sensors. A negative number means the ECUs baseline calculation if over fuelling and fuel ins now being taken away. Lon term lets us know what has been happening over time and is committed to the ECUs memory after shut-down. STFT is the immediate reaction at the O2 sensor, again the value should be 0 at best worst +- 5%. understanding fuel trims open a new window of diagnosing faults. e.g. if at idle STFT was +30% this means the system is lean, if I take the engine to 1500rpm and the trims fall back to +15% and again at 2500rpm were at +5% under load it got better but at idle it was lean means I'm looking for an air leak. The is a whole lot of other faults trims can reveal too much to explain here list here. If the OP is confident with a DVM then the is a lot of simple testing on sensors that can give a clearer picture of what is happening. Happy to post some direction if the need is felt, its cost nothing and dose not involve changing parts. |
Jan 4th, 2014, 16:21 | #20 | |
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Cheers! Neil
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London, UK Current Car - 1999 T4 V40 Ph1 66k AKA "Heather" My Previous Car: V40 2.0T 2000 Volvo V40 2.0T (B4204T3) |
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maf, map, v40, vvt |
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