black smoke

98t5 · Mar 21st, 2008, 23:43

hi, I have a second volvo, a 440 1.8si

with 76k miles, an L reg, all was fine until I laid her up for a few months, when I started her again she was spewing black smoke and also cutting out when warm refusing to start again until cold.

my head tells me the single injector is blocked? is this correct can you help?

thanks

B20F · Mar 22nd, 2008, 09:06

Could be that the petrol gummed up and it's blocking the injector. Modern petrol already starts gumming up after 6 weeks. The best is to put new gas in and remove the injector. Let the tip of the injector soak in enjector cleaner for a night and see if it works. Best is to replace the fuel filter also.
The best thing to do if you lay up your car for longer (winterperiod for example) to put some gas stabilizer (lawnmower shop) in the tank to prevent this thing happening.
Another possibility is that electric connectors are oxidised. Clean them all under the hood with contact spray and put them back together again with some vaseline to prevent oxidizing in the future. I would change the rotor, distr.cap, plugs and leads also to be sure that you get a nice spark at the plugs.

Clan · Mar 22nd, 2008, 10:07

it will be the manifold pressure sensor the hose to it will be either disconnected or the restrictor nipple in the manifold end blocked up ...

jimathan · Mar 22nd, 2008, 17:12

Have you read this?
http://www.volvoforums.org.uk/showthread.php?t=49683

Mar 21st, 2008, 23:43	#1
98t5 New Member Last Online: Oct 22nd, 2008 21:24 Join Date: Mar 2008 Location: surrey	black smoke hi, I have a second volvo, a 440 1.8si with 76k miles, an L reg, all was fine until I laid her up for a few months, when I started her again she was spewing black smoke and also cutting out when warm refusing to start again until cold. my head tells me the single injector is blocked? is this correct can you help? thanks __________________ 1998 V70 T5 Jobs completed so far, Oil and Filter Change, Pollen Filter Change Cam Belt Change ,Cam Belt Tensioner Change Cam Belt Idler pulley Change -any advice gratefully received -

Mar 22nd, 2008, 09:06	#2
B20F Master Member Last Online: Jul 7th, 2016 21:43 Join Date: Mar 2007 Location: Zeist View Photos By: B20F	Could be that the petrol gummed up and it's blocking the injector. Modern petrol already starts gumming up after 6 weeks. The best is to put new gas in and remove the injector. Let the tip of the injector soak in enjector cleaner for a night and see if it works. Best is to replace the fuel filter also. The best thing to do if you lay up your car for longer (winterperiod for example) to put some gas stabilizer (lawnmower shop) in the tank to prevent this thing happening. Another possibility is that electric connectors are oxidised. Clean them all under the hood with contact spray and put them back together again with some vaseline to prevent oxidizing in the future. I would change the rotor, distr.cap, plugs and leads also to be sure that you get a nice spark at the plugs. __________________

Mar 22nd, 2008, 10:07	#3
Clan Experienced Member Last Online: Yesterday 23:45 Join Date: Jun 2007 Location: L/H side	it will be the manifold pressure sensor the hose to it will be either disconnected or the restrictor nipple in the manifold end blocked up ... __________________ My comments are only based on my opinions and vast experience .

Mar 22nd, 2008, 17:12	#4
jimathan Senior Member Last Online: Feb 21st, 2023 16:01 Join Date: Mar 2007 Location: blackburn View Photos By: jimathan	Injector cleaning Have you read this? http://www.volvoforums.org.uk/showthread.php?t=49683 __________________ 97-98 V70 AWD Estate 2.5 20v Turbo Tartarini SGI LPG conversion 22-26 MPG(Thats 44 to 52 in real money) Petrol Injectors cleaned every 6 month

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