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700/900 Series General Forum for the Volvo 740, 760, 780, 940, 960 & S/V90 cars |
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!991 740 estate 200fViews : 1502 Replies : 10Users Viewing This Thread : |
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Jan 16th, 2006, 19:09 | #1 |
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!991 740 estate 200f
Hi guys,
Just purchased a 1991 740 estate with the 200f engine and auto gearbox, it was running extremely poor , but after a bit of elbow grease got it running perfect and idling at 750 rpm. changed filters ,plugs, leads, belts and done the cleaning of icv and throttle body. My problem is that i am only getting 75 miles out of £20.00 of fuel. The next step would be to have the injectors cleaned and re-nozzled, but would like some expert advice first, the car has done 191000 and two owners from new, the car is near enough showroom condition, but the fuel consumption is bankrupting me. Your advice much needed. Many Thanks Tidge. |
Jan 16th, 2006, 20:32 | #2 |
Trader Volvo in my veins
Last Online: May 30th, 2024 19:12
Join Date: Dec 2004
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Well gas it then that will save you a fortune.
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Jan 18th, 2006, 14:32 | #3 |
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Just another thought, would a faulty air mass meter cause the high fuel consumption? Not getting any fault codes 1-1-1, car idling at 750-800 rpm with no problems, just the fuel consumption at about 15 mpg.
Cant think of any thing else it could be. |
Jan 19th, 2006, 10:34 | #4 |
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Hi, The usual codes for hi fuel usage are 1.1.3, 1.2.1, 2.1.2, 2.3.1. You say there are no codes apart from 1.1.1 showing. Try taking a plug out. Is it blackish? Is the core biscuit color? As your engine is B200f, check the warm air flap system. If it is not working, could cause snag. Also check car is warming up correctly. Is fan stuck so it is overcooling rad. Is all your driving around town on short journeys. Do you have a locking fuel cap ( is someone taking fuel) Have you checked Ful to Full gas milage?
ivor940 94 940 2.0 SE Turbo est 5 spd 164k VOC member |
Jan 19th, 2006, 14:00 | #5 |
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Hi Ivor940,
Petrol cap is locked,that was my first thought. Have not checked the warm air flap as yet. When i first got the car i checked the fault codes, there was one logged 2-3-2, which i think is lambda sensor or leaking injector. I have cleared the faults and run the car for a week, but the fault has not recurred.I am in the midst of a full tank to mpg trial at the moment and will reprt back with the results when i have them.It is true i do a lot of stop start town driving, but the mpg still seems a bit excessive. The exhaust does seem to have a ecessive petrol smell, but that could be just me having had diesels prior to this. Thinking of replacing the lambda sensor at the weekend anyway, but the car has just passed MOT with a co2 reading of .52%, so not anticipating any change in the mpg with the replacement lambda sensor. I will also check the warm air flap to. If you any more suggestions please throw them this way. Many Thanks Tidge65 |
Jan 19th, 2006, 20:21 | #6 |
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Last Online: Mar 24th, 2024 16:34
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Wotcher. I know this aint a direct comparison but: I owned, for five years, a 1987 740 GLE 2.3 Auto (4 speed) estate which regularly returned "run" average mpg's of 34 but resolutely refused to do anything better than 17 mpg round the gigantic conurbation that is Lampeter (pop. 2-2.5k). Sometimes it would drop to 14; this was a reasonably well looked-after car, oil and filters @ 6k, new leads every couple of years, regular plug changes etc, but it had to go cos I can't afford fuel consumption that wouldn't disgrace a three and a half litre V8!
Regards, Nick H. |
Jan 21st, 2006, 15:40 | #7 |
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Just a quick update, Done a voltage check on the lambda sensor, its giving a constant .02v even when the car is revved, then checked the obd and getting a 2-3-2 code, so i am assuming the lambda sensor needs replacing.
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