stalling and rough idle after start up?
Moderators: jifflemon, coyote1980, Rachel
stalling and rough idle after start up?
Hi All,
My 480 celeb is running roughly and stalling approximately 3 mins after starting up in the morning, but after 5-10 mins the revs stay at 900rpm and the car dosnt stall.
So far Ive replaced the fuel filter, dizzy cap, throttle sensor...
Any theory's, perhaps the automatic choke?
Best
Tim
My 480 celeb is running roughly and stalling approximately 3 mins after starting up in the morning, but after 5-10 mins the revs stay at 900rpm and the car dosnt stall.
So far Ive replaced the fuel filter, dizzy cap, throttle sensor...
Any theory's, perhaps the automatic choke?
Best
Tim
Re: stalling and rough idle after start up?
Have you cleaned the idle control valve?
If not I'd certainly try that...
David
If not I'd certainly try that...
David
Current: 1994 480 GT, 1996 460 CD & 1997 440 LE with lots of optional extras & 2007 V50 SE Sport
Previous: Celebration 331 (re-homed with Richard S), Celebration 467 (returned to Martin Mc); Celebration 346 (re-homed with Alan480); Celebration 269 (scrapped abandoned project), Celebration 73 (sold on after 6 years), 1992 ES, 1988 ES - and numerous other non-480 Volvos!
Previous: Celebration 331 (re-homed with Richard S), Celebration 467 (returned to Martin Mc); Celebration 346 (re-homed with Alan480); Celebration 269 (scrapped abandoned project), Celebration 73 (sold on after 6 years), 1992 ES, 1988 ES - and numerous other non-480 Volvos!
Re: stalling and rough idle after start up?
Automatic chokes don't exist in the fuel injection world.
I'm in agreement with DCwalker, cleaning the Idle control valve would be on my list of things to do. Carb cleaner and toothbrush will do it nicely.
Is your engine temperature gauge reading ok?
I'm in agreement with DCwalker, cleaning the Idle control valve would be on my list of things to do. Carb cleaner and toothbrush will do it nicely.
Is your engine temperature gauge reading ok?
Re: stalling and rough idle after start up?
ASSUME N/A ??
also check the throttle position switch that lives BELOW the butterfly/throttle, it can get full of oil / cables broken and then can prove interesting results!
small pipe on drivers side of inlet manifold can fail (the one that goes to the bulkhead pressure sensor) though that tends to let car stall on lift-off as you approach a junction in neutral or clutch down
NB engine temperature reading is NOT the same as the one that the ECU uses, cabin display is on back o block, ECU is on front or N/S of block (from memory)
also check the throttle position switch that lives BELOW the butterfly/throttle, it can get full of oil / cables broken and then can prove interesting results!
small pipe on drivers side of inlet manifold can fail (the one that goes to the bulkhead pressure sensor) though that tends to let car stall on lift-off as you approach a junction in neutral or clutch down
NB engine temperature reading is NOT the same as the one that the ECU uses, cabin display is on back o block, ECU is on front or N/S of block (from memory)
Alan
480 ES 2litre 'Celebration' ? , C30 1.8ES, SS1
480 ES 2litre 'Celebration' ? , C30 1.8ES, SS1
-
- Can tell where the 480 was built
- Posts: 337
- Joined: Tue Feb 28, 2012 3:25 pm
- Location: Northants
Re: stalling and rough idle after start up?
If you're looking for a 'comes and goes' air leak, don't rule out injector seals. Mine were in a bad way when I rebuilt my head, the car had always had a shitty idle and would sometimes conk completely under certain conditions (like the first minute or two after a hot start when left to heat soak for like 10-15 for example, ok not the same as your problem but don't rule it out as a possible cause) and, touch wood, it hasn't done it since the rebuild and I think it's down to the new injector seals as I had already ruled out air leaks anywhere else in an effort to sort it and never managed to, until now at least. All my sensors and ICV etc are all the same as before hence me thinking it was an air leak problem and that it seems likely to have been the injector seals because they were about the only possible point for an air leak left unchecked and now they are renewed, the problem seems to have gone away without having changed anything else that would have accounted for such behaviour.
O.C. 480 D.
Re: stalling and rough idle after start up?
Thanks all, I've tried emptying a bottle of carb cleaner with no obvious effects, but my symptoms sound a lot like Alan's stalling at junctions etc, so I'll look into that, many thanks
Ti
Ti
Re: stalling and rough idle after start up?
OK the idle control valve and pipe are the latest parts to have been changed out. Still the same symptoms, stalling a few mins after start up then running well after warm up.
Which would you guys go with next to investigate, are injector seals a full strip down kind of job?
Best
Tim
Which would you guys go with next to investigate, are injector seals a full strip down kind of job?
Best
Tim
-
- Can tell where the 480 was built
- Posts: 337
- Joined: Tue Feb 28, 2012 3:25 pm
- Location: Northants
Re: stalling and rough idle after start up?
Injector seals aren't difficult to do, once you remove the top part of the inlet manifold you should see the fuel rail. Couple of brackets hold it in place, once these are off it should just pull out. The injector bores are 14mm, seals are fairly standardised, I used some from work designed for totally different bosch injectors and they were fine. Worth doing for the hour or so it will take and the few pennies for the seals.
O.C. 480 D.
Re: stalling and rough idle after start up?
Does the HBOL give the various resistances of the engine sensor that the ECU uses?
I'm at work so can't check, I could see what ours is sitting at when cold. might be different though for a two litre vs 1700?
If that wire has come off or the sensor resistance/connection is dicky then the ECU for car will think it is cold and set idle speed higher to compensate?
an easy check with very little tools required.
you could always pull the wire off and see if makes any odds, if doesn't change the way the car drives then possibly that is your problem?
only my tuppence worth
EDIT
ECU
WATER temp sensor 290 ohms +/- 20 for B18E
2500 for allothers
air inlet temp sensor 290 ohms +/- 20 for BLACK
2500 for all others BLUE
I'm at work so can't check, I could see what ours is sitting at when cold. might be different though for a two litre vs 1700?
If that wire has come off or the sensor resistance/connection is dicky then the ECU for car will think it is cold and set idle speed higher to compensate?
an easy check with very little tools required.
you could always pull the wire off and see if makes any odds, if doesn't change the way the car drives then possibly that is your problem?
only my tuppence worth
EDIT
ECU
WATER temp sensor 290 ohms +/- 20 for B18E
2500 for allothers
air inlet temp sensor 290 ohms +/- 20 for BLACK
2500 for all others BLUE
Last edited by Alan 480 on Thu Mar 23, 2017 6:48 pm, edited 4 times in total.
Alan
480 ES 2litre 'Celebration' ? , C30 1.8ES, SS1
480 ES 2litre 'Celebration' ? , C30 1.8ES, SS1
Re: stalling and rough idle after start up?
Guys thats gold, I'm so grateful
Best
Tim
Best
Tim
-
- Can tell where the 480 was built
- Posts: 355
- Joined: Tue Dec 04, 2012 7:33 pm
- Location: Derbyshire
Re: stalling and rough idle after start up?
You may wish to check this tread out it may help. Make sure you read to the end.
http://www.volvo-480-europe.org/forum/v ... 11&t=34640
http://www.volvo-480-europe.org/forum/v ... 11&t=34640
Current:
480 ES Auto 1989
480 Celebration 187
480 ES Auto 1991
CLK430 Conv 2001
Hyundai i10 2015
480 ES Auto 1989
480 Celebration 187
480 ES Auto 1991
CLK430 Conv 2001
Hyundai i10 2015
Re: stalling and rough idle after start up?
Current theory is valve seating Will keep you all posted!
Tim
Tim
Re: stalling and rough idle after start up?
Great thread Ra thanks you- current theory is the valves as my cylinder pressures are all over the show, but I'll have a look at the fairly liquid cure myself when i get it back!
Best
Tim
Best
Tim
Re: stalling and rough idle after start up?
http://www.volvo-480-europe.org/forum/v ... 11&t=12966
Have a look here. Not sure if it's the same but I solved my issue easily.
Have a look here. Not sure if it's the same but I solved my issue easily.
'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
----------------------------------------------------------
'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
Re: stalling and rough idle after start up?
Just for the record, my problem was the seating of the valves, I only had full compression on one cylinder so no wonder it was a bit of a state!
Thanks for all the help on this thread!
Tim
Thanks for all the help on this thread!
Tim