Volvo 1.9 TDI 1998 losses power and slugish in performance.
My Volvo 1998 S40 1.9TDi losses power and becomes slugish in perrformance. And almost doing 30MPG. I have checked tyre pressure, changed fuel filter but it did not work. Please help. I shall be grateful to you.
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It could be the converter. The MAF sensor was a guess, because that often is a cause of loss of power. Other possibilities are a dirty air filter, or a partially clogged fuel filter, or a fuel pump/pressure regulator problem not allowing proper pressure at the engine's fuel rail. And that's the short list. The easiest way to check the converter short of disconnecting it and testing operation of car without it hooked up is with a pocket IR thermometer laser temperature reader. The car needs to be at normal operating temperature-say after a 20 minute run time. Measure the temperature of the exhaust pipe entering the catalytic converter and the pipe leaving the converter. If the exit temperature is about 100 degrees hotter than the entry temperature, the converter is probably good. With a plugged or failing converter, the exit temperature will be the same or lower than the entry temperature. If the converter is good, check your air filter, fuel filter, and have a free scan test done at AutoZone of your engine's computer (OBD2 fault scan test). There might be a trouble code pointing to the problem, like for example, the MAF sensor. Good luck. Post back if you need further assistance.
hi if your talking about service then you need to find out when the timing belt was done last if it has not been done then its due.
other than that you need to check gearbox oil level change oil and oil filter change air filter change spark plugs change fuel filter check tyres and tyre pressure check lights working check washer bottle fluid level and check its working take it for a drive on a bumpy road and listen for any knocking noises if any are heard then bottom ball joint needs replacing.
i hope i have given you enough to be getting on with.
let me know how you get on or if you need further assistance ok