My 960 does not start. I changed the spark plus and air filter as preventative maintenance, and after that it does not start. The car was running rough leading into the tune-up process. What are the possibilities of the source of the problem? The car has >300K miles on it.
Is there fuel pressure at the fuel rail ? will need a electronic fuel pressure tester. Rough idling sometimes is a indication that the fuel pump is going south , could also be the fuel pressure regulator. Also , electronically , check the diagnostic plug for codes.
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Surely your not waiting for 90,000 miles to do all sorts of things By then you should have changed your transmission & power steering fluids at least 2 times & flushed your brake fluid every 2 years on all vehicles I do Air,Cabin,Fuel Filter & Spark Plugs every 3 year What your asking is Manufacture Recommended Service Wait on that you will either break down or have a vehicle that won't last much past 100,000 The question you ask is in your owners manual You need a vehicle Log Book You need to develop your own Preventative Maintenance Schedule based on time as well as mileage & forget the manufacturescheduled maintenance,your schedule will include theirs & much most based on your lifetime of knowledge & experience & repairs You treat ALL Vehicles the same It's not a wait & see game It is about education & preventing problem down the road No vehicle manufacture really care what you do or they would tell you about power steering,brake fluid & stop with the silly 100,000 spark plug & trans fluid changed,by then the damage will be done
Thanks for choosing FixYa and welcome to the site. At your mileage, it is time to do a tune up anyway. You are going to want to change your serpentine belts. You will want to change your spark plugs/coils, wires, coil packs, distributor cap. You are going to want to change the transmission fluid and filter. Also, flush your radiator and change the coolant. You will want to purchase a new fuel filter and air filter also. It would be a good time for a new PCV valve to. If you want to balance the front end and tires, I would do it. If not, the tune up should increase engine performance. If you have any questions, feel free to ask and thanks for using FixYa.
New spark plugs, oil and oil filter, transmission flush and fill, fuel filter, air filter, coolant flush and fill, clean throttle body plate and bore, clean the MAF sensor, replace any loose or cracked vacuum lines, PCV valve, new air filter, new battery.
99% of the time all you should ever need for a tune up is new spark plugs, and a clean air filter and throttle body. But since your inquiry indicated "major" I gave it more critical thought.
I tell all my customer this, Preventive maintenance pays for its self. Complete diagnostic, transmission fluid/filter change, spark plugs/wires, air filter, ofcourse oil/filter. Inspect all belts and hoses, and lube the chassis where applicable. Check shocks/struts. If it runs 300 or so and saves you 3000 later, its worth it.
Things to have inspected..... Belts, air/cabin filters, pcv/evap/canister valves, brake/steering/trans/diff fluids, coolant, spark plugs (if not done around 90K)... I would check for any oil leaks or any seals that looks like they are corroding and may start to leak soon. Lastly, make sure the timing belt/chain has been replaced! If timing belts start to wear and snap, most likely you will have internal engine failure and damage..... If you can get through all this to make sure everything looks good, you will be in great shape... Then just keep up with it! Hope this helps.