940 running problems. - Page 3

treehorndogsbody · Oct 29th, 2010, 09:45

I think they are something to do with the 'dim dip' day running lights. They are a type of resistor I think. Some sage will confirm this or put forward a more knowledgable answer.

chorleybo · Oct 29th, 2010, 16:59

your problem is very similar to mine , i have cleaned the maf and the pcv pipework , i noticed 1 of the intercooler pipes was perished so i have taped it up with self amalgamating rubber tape (screwfix £ 2 something for 10 metres) and has run like a dream today , stable idle and i can floor the throttle without the engine dying, might be worth having a look at your pipes

terrywilde07 · Oct 29th, 2010, 19:24

ok... stab in the dark here...

it's fixed many problems with other makes of car and not just volvo

remove and replace the ignition relay with a brand new one, they're only a couple of quid... when OBD II was being introduced into cars not all sensors were readable by the 'new' code readers... and if there was a fault it was hard to isolate a problem... the ECU stores fault codes, but on the earlier cars which had OBD II installed, the ECU would be purged of all fault codes if the ignition relay had an intermittent fault, this resulted in no codes being present when read... EU officials requiered car manufacturers to install OBD II into all cars by 2002 (OBD II = On Board Diagnostics Phase 2)

I discovered this when I started my 940 Wentworth after a service and forgot to re-connect the MAFF sensor wire and the Lambda light came on... to clear the fault code I purged the ECU by turning on the ignition, pulled the ignition relay, switch off the ignition, back on without the relay in, and then off... replaced the ignition relay and started the engine... ECU was purged and no Lambda light...

also get it compression tested as suggested earlier in this thread as the red blocks are a little well know for head gaskets going between 2 & 3 as that is the hottest part of the engine (middle)

Don't give up on the old girl... she'll be worth it... she's testing your commitment to her... just like a real woman does...

Oct 29th, 2010, 09:45	#21
treehorndogsbody VOC Member Last Online: Sep 7th, 2015 15:14 Join Date: Jan 2009 Location: DEWSBURY	Hot box? I think they are something to do with the 'dim dip' day running lights. They are a type of resistor I think. Some sage will confirm this or put forward a more knowledgable answer. __________________ My car:- 2004(54) S60 SE D5 auto in Mistral Green with Cream leather

Oct 29th, 2010, 19:24	#23
terrywilde07 Senior Member Last Online: Aug 31st, 2015 03:01 Join Date: Apr 2007 Location: chesterfield	ok... stab in the dark here... it's fixed many problems with other makes of car and not just volvo remove and replace the ignition relay with a brand new one, they're only a couple of quid... when OBD II was being introduced into cars not all sensors were readable by the 'new' code readers... and if there was a fault it was hard to isolate a problem... the ECU stores fault codes, but on the earlier cars which had OBD II installed, the ECU would be purged of all fault codes if the ignition relay had an intermittent fault, this resulted in no codes being present when read... EU officials requiered car manufacturers to install OBD II into all cars by 2002 (OBD II = On Board Diagnostics Phase 2) I discovered this when I started my 940 Wentworth after a service and forgot to re-connect the MAFF sensor wire and the Lambda light came on... to clear the fault code I purged the ECU by turning on the ignition, pulled the ignition relay, switch off the ignition, back on without the relay in, and then off... replaced the ignition relay and started the engine... ECU was purged and no Lambda light... also get it compression tested as suggested earlier in this thread as the red blocks are a little well know for head gaskets going between 2 & 3 as that is the hottest part of the engine (middle) Don't give up on the old girl... she'll be worth it... she's testing your commitment to her... just like a real woman does... __________________ Current: 05 Mercedes C55 AMG, 97(R) V40 1.9 TD, 02(51) S40 S Past: 86(C) 360 GLT, 93(K) 940 Wentworth, 95(M) 440 Si, 94(L) 940 Wentworth, 91(J) 460 GLEi Auto, 98(R) S90 Executive II

Oct 29th, 2010, 16:59	#22
chorleybo Junior Member Last Online: Apr 6th, 2011 16:59 Join Date: Sep 2007 Location: ipswich	your problem is very similar to mine , i have cleaned the maf and the pcv pipework , i noticed 1 of the intercooler pipes was perished so i have taped it up with self amalgamating rubber tape (screwfix £ 2 something for 10 metres) and has run like a dream today , stable idle and i can floor the throttle without the engine dying, might be worth having a look at your pipes

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