first of all, one cylinder had got stuck. my mechanic fixed that, yet there was lots of carbon left in it. so my mechanic tried to get all of it out, the most that he could.. then, after he did all of that, the car would not move at all, unless you put the pedal to the ground, and then it would actually go. the mechanic said that it needed a new fuel filter. so i put on a new fuel filter. now, it gets very bad gas milage... as in 8-12 mpg, when normally it had gotten around 22-26mpg.and the spark plugs are getting fouled out. the mechanic that normally fixes my car is really not helping that much. it seems just to be getting worse.
does anyone know whats happening and whats wrong with my Volvo?
good answers would greatly be appreciated... thanks
and its not using up oil....
2006-07-13 15:44:30 · 5 answers · asked by locke32080 1 in Cars & Transportation ➔ Maintenance & Repairs
The problem probably originated in the nut behind the wheel
2006-07-13 15:48:07 · answer #1 · answered by Fully armed in the battle of wits 7 · 0⤊ 0⤋
I have owned three Volvos to date. I assume a 740/760 GL. The fuel delivery system is not working correctly. This can be attributed to many things. An off the cuff guess would be an oxygen sensor. The O2 sensor allows the computer to adjust the air fuel mixture according to driving conditions. If it malfunctions you can have the problems you are describing. I would strongly urge you to take it to Volvo for proper diagnosis. It is expensive to have a dealer work on it but well worth the cost. A reputable dealer will fix it right the first time every time. I made the mistake of letting local garages work on mine. I take them to Volvo only now. Plus a Volvo dealer will give you a loaner at no extra cost. 1999S80 and 2000S70 are my current vehicles. Had a 95 940 and regret selling it.
2006-07-13 16:07:43 · answer #2 · answered by Anonymous · 0⤊ 0⤋
If you had a lot of carbon build up and the piston was stuck, something allowed the build up to occur. By cleaning the carbon away could left too much of a gap between the rings and cylinder walls. You did not say if he honed out the cylinder walls. If the walls are slick your compression will go down. This will cause bad gas mileage and fouled out plugs. You should do a compression check of your engine, to determine it's condition. Get a Haynes manual to get the proper compression check procedure.
Good Luck
2006-07-13 16:24:57 · answer #3 · answered by NEWBEE1 6 · 0⤊ 0⤋
too much raw gas can fowl plugs also,
seems to me in the process of blowing out the carbon , which shouldn't be needed the injectors may be ruined. if the injectors are not spraying in a good
conical pattern and complete atomization the raw gas will not be completely burned and gas milage and performance will suffer dramatically.
2006-07-13 15:58:51 · answer #4 · answered by jamesd 3 · 0⤊ 0⤋
You need to pull your egr valve and clean your plentum thoroughly. Probably needs a MAF sensor. Pull the TPS and clean all of the gunk out of it too. Sea Foam will eat all that crap up. Good luck.
2006-07-13 17:42:53 · answer #5 · answered by jeff s 5 · 0⤊ 0⤋