My Volvo 940 - Page 2

RollingThunder · May 2nd, 2007, 12:55

May be a red herring this one, but I had a starting problem on my old 1994 940 B200FT - it would fire up instantly then stall. Restarting it had it running normally - it only happened the first time I tried to start it in the morning.

My problem was the fuel pressure valve on the main (under cabin) fuel pump which was allowing fuel to drain away from the fuel rail over night. I replaced the pump (you can't get the valve separately) at a cost of £60 IIRC, and that cured it.

Its not quite the misfire you described, but it might be worth thinking about - check your fuel rail pressure first thing in the morning before you try and start her up.

rogerb · May 2nd, 2007, 15:39

As above ,check the state of the leads ,plugs ,dissey cap and rotor arm,they
suffer from damp and dirt, as hiden at the back of the head it dose not get looked at often ,esplicy if the leads/cap are orginal.
when you stoped the car there was probley just enugh heat from the exzust
to dry the leads a little and stop the missing,then when it got gooing the car burnt off the unburnt fuel.
The other thing that I have come acros on b2xx engines is a simler fault caused by dampness from the first sines of head gaskit problems,
usaly about 125k-150k.
Of cause it could be some thing else compleatley,but those are the two
that I have come acrose.

Regards Roger

adamsky01 · May 2nd, 2007, 21:35

well it dint do it today must of been a one of oh well there goes my brain till i work out what it was lol

m0bzy · May 2nd, 2007, 22:45

Sorry to say,but it sounds like the start of a blown cylinder head gasket,water in bore(s) on first start,turned to steam on second.

Mike

adamsky01 · May 2nd, 2007, 23:34

Quote:

Originally Posted by m0bzy

Sorry to say,but it sounds like the start of a blown cylinder head gasket,water in bore(s) on first start,turned to steam on second.

Mike

cheres for that m8 but i no its not that for sure the pistons are 12 months old same as the valve,s i have a micro fiber optic cam which i put in the clyilnder bores when it was cold and they are all fine it hasent done it since so lets see how it goes

May 2nd, 2007, 12:55	#11
RollingThunder Grumpy Old Git Last Online: Apr 19th, 2024 09:16 Join Date: Dec 2004 Location: South Yorkshire View Photos By: RollingThunder	May be a red herring this one, but I had a starting problem on my old 1994 940 B200FT - it would fire up instantly then stall. Restarting it had it running normally - it only happened the first time I tried to start it in the morning. My problem was the fuel pressure valve on the main (under cabin) fuel pump which was allowing fuel to drain away from the fuel rail over night. I replaced the pump (you can't get the valve separately) at a cost of £60 IIRC, and that cured it. Its not quite the misfire you described, but it might be worth thinking about - check your fuel rail pressure first thing in the morning before you try and start her up. __________________ S40 2.4i '07 Japanese import '96 850R - https://www.volvoforums.org.uk/showthread.php?t=312484 Ex Danish Embassy '96 940 GLE LPT - https://www.volvoforums.org.uk/showthread.php?t=326071

May 2nd, 2007, 15:39	#12
rogerb Lets take it to bits Last Online: Apr 23rd, 2023 09:01 Join Date: Dec 2004 Location: Near Wellingborough	As above ,check the state of the leads ,plugs ,dissey cap and rotor arm,they suffer from damp and dirt, as hiden at the back of the head it dose not get looked at often ,esplicy if the leads/cap are orginal. when you stoped the car there was probley just enugh heat from the exzust to dry the leads a little and stop the missing,then when it got gooing the car burnt off the unburnt fuel. The other thing that I have come acros on b2xx engines is a simler fault caused by dampness from the first sines of head gaskit problems, usaly about 125k-150k. Of cause it could be some thing else compleatley,but those are the two that I have come acrose. Regards Roger

May 2nd, 2007, 21:35	#13
adamsky01 back for now Last Online: Aug 17th, 2016 21:48 Join Date: Aug 2006 Location: gone	well it dint do it today must of been a one of oh well there goes my brain till i work out what it was lol

May 2nd, 2007, 22:45	#14
m0bzy Master Member Last Online: Feb 19th, 2021 17:00 Join Date: Nov 2003 Location: Birmingham	Sorry to say,but it sounds like the start of a blown cylinder head gasket,water in bore(s) on first start,turned to steam on second. Mike

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