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200 Series General Forum for the Volvo 240 and 260 cars |
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An Emerging SagaViews : 718 Replies : 9Users Viewing This Thread : |
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Jul 16th, 2006, 19:22 | #1 |
VOC Member
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An Emerging Saga
Just serviced the 245 (B200F injection)- changed oil and filter, d/cap and rotor arm plus air filter.
First long fast run today and lambda warning light came on and the engine temperature gauge climbed alarmingly high. The temp was brought back down with the heater on full heat- round trip around 20 miles I haven't had chance to investigate yet- but might I have disturbed something while tinkering (air mass meter is on the hose leading to the air cleaner unit, etc)? Also, having removed the splashguard, I noticed a perished flexi aluminium pipe which runs from under the exhaust manifold (with a remaining 15" or so) and appears to have once gone (at full "pre-break-off" length) to a male coupling on the lower side of the air cleaner unit (near the bottom of the rad) I cut off a short piece of the remaining pipe in order to source a new one. Am I correct in thinking that the routing is as above and what is its function (cold start, perhaps)? Any ideas on the lambda and high temp. appreciated before I start jiggling around! |
Jul 16th, 2006, 19:40 | #2 |
Former Support Team
Last Online: Jan 26th, 2024 11:26
Join Date: Jan 2006
Location: Nr Norwich
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Yes, its a cold start air feed to the filter box.
No don't bother replacing it, can fry the filter air box if the thermostatic valve stops working. It does not seem to make any difference at all to the starting and running in this country. Its more like early 50's and before technology, where problems were to be had with carb icing. Seems to serve no useful purpose at all with the fuel injected engines, just a potential source of disaster. Perceived wisdom on this forum is to discard the thing completely! Did you do anything to the cooling system on the service. I believe that its possible to develop an air lock in the system, and the cure is to put the heater on to get rid of the air.
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Alec. (My other car is a WD 2-10-0) |
Jul 16th, 2006, 19:42 | #3 |
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Last Online: Aug 31st, 2009 21:30
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Hello DJ, you are indeed right about the cold start hose, it is not life or death if it is there or not, some people remove it and leave it off others replace with cone filters, you may be surprised at the cost of a new one from Hellfords etc.
Unfortunatly I don't kow much about the lambda sensor but I'm sure someone will
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1994 480 ES - 2.0 Auto (Blondie77's Car) Poppy 1980 24? GL - Pick Up, Complete shed 1984 244 GLT - NORDICA Replica (ish) aka Minstrel 1989 245 GL(T) - Modified Tulip (Died 01.01.2007) 1996 460 Turbo - Scrap metal (11.01.2007) 1986 245 GL - Dead 1982 240 GLT - Rust bucket, all parts saved 1989 745 GL - Sold and still going 1989 440 Xi - Sold and still going 1988 240 GLT - Dead 1989 360 GLT - Stolen 1988 360 GLT - Twisted shell!! Erm....I've lost my keys again darling. |
Jul 16th, 2006, 20:28 | #4 |
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An Emerging Saga
Many thanks to both swift reply posters- very useful.
I'm still dis-chuffed about the overheating, though- has the thermostat died coincidentally with the work I did (or a gauge/electrical thing) or was because I was ham-fisted and knocked something! |
Jul 17th, 2006, 06:42 | #5 |
Not an expert but ...
Last Online: Yesterday 12:45
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Location: Boncath
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If the Lambda light is on it means there is a fault registered by the On Board Diagnostic unit. That is the small black box mounted on the top of the left hand inner wing, just in front of the windscreen wiper motor.
Haynes gives the procedure for reading it. |
Jul 17th, 2006, 07:41 | #6 |
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An Emerging Saga
Many thanks, Clifford- I'll investigate asap.
Dave |
Jul 20th, 2006, 00:01 | #7 |
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Last Online: Aug 13th, 2022 07:48
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You haven't said what year your car is - so a complete 'shot in the dark' - but might you have disconnected the knock sensor on the engine?
I think the ECU will advance the ignition timing until the knock sensor tells it to back off - and over advanced ignition would cause overheating. Might also explain the 'check engine' light. |
Jul 20th, 2006, 19:53 | #8 |
VOC Member
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An Emerging Saga
Many thanks, Glen Morangie. It's a '91 H reg. I suspected that I'd done something while servicing it as it would have been a b----y unlucky coincidence seeing as the trip when all went wrong was the first time I used the car after the service.
I haven't had chance to check the car yet as I'm still at work, but it's booked in at a main dealer's for checking on Friday morning. Where would I find the sensor? Dave |
Jul 20th, 2006, 22:01 | #9 | |
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Quote:
As a general rule if I experience any electrical gremlins like this, I remove and replace any of the electrical connectors in the immediate area I have been working - often just disturbing them gives a bad connection, removing and replacing the connectors cleans up the contact. Last edited by Glen Morangie; Jul 20th, 2006 at 22:05. |
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Jul 21st, 2006, 10:44 | #10 |
VOC Member
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An Emerging Saga
Thanks again, Glen M,
I reconnected all the electrical connections around the engine plus the air mass meter connector on the air ducting; lambda light is now out and all seems to be working OK. I took a test drive to the local main dealer where it was booked in for them to investigate, and it behaved, and they were happy not to take my money (Lipscombe, Canterbury) so fingers crossed- end of saga! Dave |
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