Cold start idle

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Rachel
480 Is my middle name
Posts: 1558
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Cold start idle

Post by Rachel » Mon Feb 19, 2007 5:21 pm

From very cold my 480 idles very slow....I need to reset it, but I still can't find the other side of the two wires which I need to connect to set it. Everything else has been checked...engine temp sensor, idle valve, fuel ecu, throttle position sensor etc....so its just this standing in the way of a smooth idle when she is cold in the morning. I even went to Volvo today to see if anyone could help...I thought it would be a waste of time before I got there, and yes, I was right, it was a complete waste of time. :( Could someone please help me and tell me where this illusive wire might be hiding??
;)
'95 Storm Grey 323 Manual Turbo, Richmod
----------------------------------------------------------
'95 Flame Red Celeb, Nos.191, 2 litre, LPG, used to be Adams ;) SOLD
'95 Vase Green Turbo~ Vanessa~ 'Serendipity' manual, Richmod. RIP
'90 Light Blue 480 Turbo auto....RIP
'68 VW Type 3 1.6 auto Lotus White,Swedish import. SOLD
Audi 80 coupe Gold...pimp my ride! RIP
'76 Bug, Ocean Blue, lowered, Empi wheels.RIP
'72 Bay window VW Camper 1600 twinport. Sold

Rachel
480 Is my middle name
Posts: 1558
Joined: Thu Feb 09, 2006 2:21 pm
Location: Bucks

Post by Rachel » Mon Feb 19, 2007 6:03 pm

I have been told I need to earth it....but probably not my problem, which leads me to the question....what can it be!!? ;)
'95 Storm Grey 323 Manual Turbo, Richmod
----------------------------------------------------------
'95 Flame Red Celeb, Nos.191, 2 litre, LPG, used to be Adams ;) SOLD
'95 Vase Green Turbo~ Vanessa~ 'Serendipity' manual, Richmod. RIP
'90 Light Blue 480 Turbo auto....RIP
'68 VW Type 3 1.6 auto Lotus White,Swedish import. SOLD
Audi 80 coupe Gold...pimp my ride! RIP
'76 Bug, Ocean Blue, lowered, Empi wheels.RIP
'72 Bay window VW Camper 1600 twinport. Sold

catgroom
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Post by catgroom » Mon Feb 19, 2007 9:31 pm

Its that its broken ;)

A longshot Rach but try the 2 rigid pipes which go into the inlet manifold.If theyre not pushed in fully you'll get an airvs leakvm.
I'm No Longer Here :(

http://www.volvo-480-europe.org/forum/viewtopic.php?f=19&t=34359&start=20

Rachel
480 Is my middle name
Posts: 1558
Joined: Thu Feb 09, 2006 2:21 pm
Location: Bucks

Post by Rachel » Mon Feb 19, 2007 9:46 pm

Thanks for that, will have a look.
'95 Storm Grey 323 Manual Turbo, Richmod
----------------------------------------------------------
'95 Flame Red Celeb, Nos.191, 2 litre, LPG, used to be Adams ;) SOLD
'95 Vase Green Turbo~ Vanessa~ 'Serendipity' manual, Richmod. RIP
'90 Light Blue 480 Turbo auto....RIP
'68 VW Type 3 1.6 auto Lotus White,Swedish import. SOLD
Audi 80 coupe Gold...pimp my ride! RIP
'76 Bug, Ocean Blue, lowered, Empi wheels.RIP
'72 Bay window VW Camper 1600 twinport. Sold

Rachel
480 Is my middle name
Posts: 1558
Joined: Thu Feb 09, 2006 2:21 pm
Location: Bucks

Post by Rachel » Mon Feb 19, 2007 9:46 pm

Thanks for that, will have a look. ;)
'95 Storm Grey 323 Manual Turbo, Richmod
----------------------------------------------------------
'95 Flame Red Celeb, Nos.191, 2 litre, LPG, used to be Adams ;) SOLD
'95 Vase Green Turbo~ Vanessa~ 'Serendipity' manual, Richmod. RIP
'90 Light Blue 480 Turbo auto....RIP
'68 VW Type 3 1.6 auto Lotus White,Swedish import. SOLD
Audi 80 coupe Gold...pimp my ride! RIP
'76 Bug, Ocean Blue, lowered, Empi wheels.RIP
'72 Bay window VW Camper 1600 twinport. Sold

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martinholmesuk
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Joined: Thu Sep 05, 2002 9:43 pm
Location: London

Post by martinholmesuk » Mon Feb 19, 2007 10:40 pm

Parts changed or tested

IDLE VALVE
THROTTLE POSTION SENSOR
ENGINE ECU TEMP SENSOR
TEMP SENSOR
CRANK SENSOR
MANIFOLD
VAC LEAKS
FUEL ECU
IGITION ECU
PIN 11/12 ON ECU
SPARK PLUGS
DIZZY CAP
ROTOR ARM
HT LEADS
MAF
INTERCOOLER PIPES
OIL CHANGED
RECIRC VALVE

THINGS TO TRY

OIL SEP VALVE & VAC DIAPHRAGM
OXYGEN SENSOR (I DOUBT)

I have spent much time on this problem but so far I don't have the answer.
Last edited by martinholmesuk on Tue Feb 20, 2007 8:09 pm, edited 1 time in total.
Volvo 940 Turbo 19T
Audi TT

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crispy-d
Knows an Aerodeck isn't a 480
Posts: 229
Joined: Sun Aug 07, 2005 1:09 am
Location: Ipswich, Suffolk

Post by crispy-d » Mon Feb 19, 2007 11:52 pm

I have the exact same problem - idles too low when cold (juddering like mad) but fine and stable when warm. Has never done it before, only did it after cylinder head was replaced, so I was thinking it was a sensor somewhere. They are all fine though, I think, unless the idle valve is getting a back-to-front signal (high idle when warm and low when cold? If that can happen?)

I don't know if you can test the transistor in the fuel ECU by checking voltages across the idle valve wires? Not sure what to look for, but the values I get with the engine running are a bit weird, and do fluctuate. What's more, on disconnecting the idle valve there is no change at all in idle speed, whereas before there was, I think.

On my last trip to Bristol I also only got 27mpg!!!!!! As opposed to my usual ~44mpg. Yet car runs amazingly, so can't be too rich.
Volvo 340 GL 1.7 :) - Nice (RWD missed) - sold
Volvo 460 SI Turbo ('Rich Mod' / 2.5" Longlife SS exhaust / 710N CBV / Cold Air Intake) - (Turbo missed) - sold
Volvo S90 3.0 CD 24v (RWD back again! LOVING the straight six :) ) - is 16mpg that bad...? - sold
BMW E34 540i 6-speed Manual V8 :) - sold
BMW E39 M5
Land Rover 110 V8

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martinholmesuk
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Post by martinholmesuk » Tue Feb 20, 2007 4:14 pm

That's Vader head right? I never had any idle issues. I removed my new sensors from that head before selling so I doubt it's sensor or head related on both cars.

I still vote oil sep valve but of course I don't have a spare and removing from mine to test is a bad idea as they break whenever removed :badmood: trust me at £40+ there not cheap.

course vader never had the valve :D
Volvo 940 Turbo 19T
Audi TT

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crispy-d
Knows an Aerodeck isn't a 480
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Post by crispy-d » Tue Feb 20, 2007 7:41 pm

Well I know for a fact that the oil sep valve is knackered, so that's coming off then!! Just plug up the neccessary pipes and whack a filter on the breather, yes? Didn't think it would make that much difference. The diaphragm in my recirc valve's also split, so I'll have to replace that too. Maybe that's all that's wrong with it...Thanks for the help.
Volvo 340 GL 1.7 :) - Nice (RWD missed) - sold
Volvo 460 SI Turbo ('Rich Mod' / 2.5" Longlife SS exhaust / 710N CBV / Cold Air Intake) - (Turbo missed) - sold
Volvo S90 3.0 CD 24v (RWD back again! LOVING the straight six :) ) - is 16mpg that bad...? - sold
BMW E34 540i 6-speed Manual V8 :) - sold
BMW E39 M5
Land Rover 110 V8

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martinholmesuk
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Posts: 10037
Joined: Thu Sep 05, 2002 9:43 pm
Location: London

Post by martinholmesuk » Tue Feb 20, 2007 8:11 pm

The oil valve can screw it up.

The diaphragm just off the idle valve could be the problem with rachel's 480.

Want to borrow one?
Volvo 940 Turbo 19T
Audi TT

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crispy-d
Knows an Aerodeck isn't a 480
Posts: 229
Joined: Sun Aug 07, 2005 1:09 am
Location: Ipswich, Suffolk

Post by crispy-d » Fri Mar 02, 2007 3:20 pm

Right, I have now checked/replaced everything I could and the idle when warm is still too high. The idle valve seems to move well enough, and with the pipes off whilst starting the engine, it moves so I'm assuming the ECU is working as it's sending it a signal. I noticed that when I allowed more air through the pipe, the rpm dropped. So I'm thinking that if it is the diaphram just off the valve that's gone (as you've suggested Martin) then it's not opening enough at idle to let enough air through.

It is the only thing possible left (again as you said Martin) so I might have to try it. I have looked for the part tho, but can't find it? Richard suggested using another recirc valve, but I'd need larger pipes for that. Does that diaphram thing come apart to be checked? If Rachel has tried Martin's spare idle valve diaphram (no idea what it's called) has it worked?

Thanks
Volvo 340 GL 1.7 :) - Nice (RWD missed) - sold
Volvo 460 SI Turbo ('Rich Mod' / 2.5" Longlife SS exhaust / 710N CBV / Cold Air Intake) - (Turbo missed) - sold
Volvo S90 3.0 CD 24v (RWD back again! LOVING the straight six :) ) - is 16mpg that bad...? - sold
BMW E34 540i 6-speed Manual V8 :) - sold
BMW E39 M5
Land Rover 110 V8

Rachel
480 Is my middle name
Posts: 1558
Joined: Thu Feb 09, 2006 2:21 pm
Location: Bucks

Post by Rachel » Fri Mar 02, 2007 4:31 pm

Hi Crispy-d. I have only just got the part today, so I'm hoping to know tomorrow. All my fingers are crossed. It wasn't cheap either....40 odd quid! :shock:
'95 Storm Grey 323 Manual Turbo, Richmod
----------------------------------------------------------
'95 Flame Red Celeb, Nos.191, 2 litre, LPG, used to be Adams ;) SOLD
'95 Vase Green Turbo~ Vanessa~ 'Serendipity' manual, Richmod. RIP
'90 Light Blue 480 Turbo auto....RIP
'68 VW Type 3 1.6 auto Lotus White,Swedish import. SOLD
Audi 80 coupe Gold...pimp my ride! RIP
'76 Bug, Ocean Blue, lowered, Empi wheels.RIP
'72 Bay window VW Camper 1600 twinport. Sold

User avatar
crispy-d
Knows an Aerodeck isn't a 480
Posts: 229
Joined: Sun Aug 07, 2005 1:09 am
Location: Ipswich, Suffolk

Post by crispy-d » Fri Mar 02, 2007 5:47 pm

Haha - yes I just got back from town. Haven't come back with one for that reason! £47, and it has to come from Sweden apparently, so that's then 2 days for delivery (which looking at it isn't that bad). I don't want to order that until I know it'll make a difference. Another 710N recirc valve plus some pipe adaptors would be cheaper :?

Best of luck with it!!
Volvo 340 GL 1.7 :) - Nice (RWD missed) - sold
Volvo 460 SI Turbo ('Rich Mod' / 2.5" Longlife SS exhaust / 710N CBV / Cold Air Intake) - (Turbo missed) - sold
Volvo S90 3.0 CD 24v (RWD back again! LOVING the straight six :) ) - is 16mpg that bad...? - sold
BMW E34 540i 6-speed Manual V8 :) - sold
BMW E39 M5
Land Rover 110 V8

Rachel
480 Is my middle name
Posts: 1558
Joined: Thu Feb 09, 2006 2:21 pm
Location: Bucks

Post by Rachel » Fri Mar 02, 2007 5:51 pm

Cheers mate, will let you know asap ;)
'95 Storm Grey 323 Manual Turbo, Richmod
----------------------------------------------------------
'95 Flame Red Celeb, Nos.191, 2 litre, LPG, used to be Adams ;) SOLD
'95 Vase Green Turbo~ Vanessa~ 'Serendipity' manual, Richmod. RIP
'90 Light Blue 480 Turbo auto....RIP
'68 VW Type 3 1.6 auto Lotus White,Swedish import. SOLD
Audi 80 coupe Gold...pimp my ride! RIP
'76 Bug, Ocean Blue, lowered, Empi wheels.RIP
'72 Bay window VW Camper 1600 twinport. Sold

Rachel
480 Is my middle name
Posts: 1558
Joined: Thu Feb 09, 2006 2:21 pm
Location: Bucks

Post by Rachel » Fri Mar 02, 2007 10:03 pm

I got mine for £42.54, ordered it on tuesday.
'95 Storm Grey 323 Manual Turbo, Richmod
----------------------------------------------------------
'95 Flame Red Celeb, Nos.191, 2 litre, LPG, used to be Adams ;) SOLD
'95 Vase Green Turbo~ Vanessa~ 'Serendipity' manual, Richmod. RIP
'90 Light Blue 480 Turbo auto....RIP
'68 VW Type 3 1.6 auto Lotus White,Swedish import. SOLD
Audi 80 coupe Gold...pimp my ride! RIP
'76 Bug, Ocean Blue, lowered, Empi wheels.RIP
'72 Bay window VW Camper 1600 twinport. Sold

Rachel
480 Is my middle name
Posts: 1558
Joined: Thu Feb 09, 2006 2:21 pm
Location: Bucks

Post by Rachel » Sat Mar 03, 2007 9:28 am

Yipeeee!! :wave: It's worked!! Out there first thing this morning to change it over and low and behold on turning the key she sprung into life none of those low revs! So pleased.....Go for it Crispy-d and have yourself higher cold start revs ;)
'95 Storm Grey 323 Manual Turbo, Richmod
----------------------------------------------------------
'95 Flame Red Celeb, Nos.191, 2 litre, LPG, used to be Adams ;) SOLD
'95 Vase Green Turbo~ Vanessa~ 'Serendipity' manual, Richmod. RIP
'90 Light Blue 480 Turbo auto....RIP
'68 VW Type 3 1.6 auto Lotus White,Swedish import. SOLD
Audi 80 coupe Gold...pimp my ride! RIP
'76 Bug, Ocean Blue, lowered, Empi wheels.RIP
'72 Bay window VW Camper 1600 twinport. Sold

Rachel
480 Is my middle name
Posts: 1558
Joined: Thu Feb 09, 2006 2:21 pm
Location: Bucks

Post by Rachel » Sat Mar 03, 2007 10:10 am

In my joy I forgot to thank Martin for his work trying to sort out Serendipity and for his final diagnosis :D
Also a general shout out to all and for the forum for being such a great one! :hopping:
'95 Storm Grey 323 Manual Turbo, Richmod
----------------------------------------------------------
'95 Flame Red Celeb, Nos.191, 2 litre, LPG, used to be Adams ;) SOLD
'95 Vase Green Turbo~ Vanessa~ 'Serendipity' manual, Richmod. RIP
'90 Light Blue 480 Turbo auto....RIP
'68 VW Type 3 1.6 auto Lotus White,Swedish import. SOLD
Audi 80 coupe Gold...pimp my ride! RIP
'76 Bug, Ocean Blue, lowered, Empi wheels.RIP
'72 Bay window VW Camper 1600 twinport. Sold

User avatar
crispy-d
Knows an Aerodeck isn't a 480
Posts: 229
Joined: Sun Aug 07, 2005 1:09 am
Location: Ipswich, Suffolk

Post by crispy-d » Sat Mar 03, 2007 1:03 pm

Ah good stuff, nice one Rachel! I'm off to get one then!
And yes, thanks to Martin also who pointed it out, otherwise I'd probably never have noticed it being there.
Glad yours is working, anyway.

Regards,

Crispin
Volvo 340 GL 1.7 :) - Nice (RWD missed) - sold
Volvo 460 SI Turbo ('Rich Mod' / 2.5" Longlife SS exhaust / 710N CBV / Cold Air Intake) - (Turbo missed) - sold
Volvo S90 3.0 CD 24v (RWD back again! LOVING the straight six :) ) - is 16mpg that bad...? - sold
BMW E34 540i 6-speed Manual V8 :) - sold
BMW E39 M5
Land Rover 110 V8

User avatar
martinholmesuk
Friend of Club 480 Europe
Posts: 10037
Joined: Thu Sep 05, 2002 9:43 pm
Location: London

Post by martinholmesuk » Sat Mar 03, 2007 9:14 pm

:hopping: Splendid news! I'm happy to be of help.

Mart
Volvo 940 Turbo 19T
Audi TT

catgroom
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Contact:

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Post by catgroom » Sat Mar 03, 2007 11:27 pm

Nice one Raquellus!

Nowt like having summit finally done thats been fucked for ages!

:D
I'm No Longer Here :(

http://www.volvo-480-europe.org/forum/viewtopic.php?f=19&t=34359&start=20

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