Owner said he just parked and when he returned his 1993, 940 volvo will not start. checks made timing belt, fuel injector and internal and external pumps, distributor, rotor, air sensor. can malfunctionig computer cause this?
My 94/ 940 had the same problem turned out to be worn out crank-shaft sensor.. generic cost$115 for part .Canadian tire charged me $400 for job.would have been much cheaper had i checked forums first good luck
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Jesse, if you are smelling "Raw Gas" then this is a sign of a gas leak or an injector stuck open flooding the system.
Start the engine and check for fuel leaking from the injectors sometimes and injector will leak externally. Also check for fuel leaks around the fuel line and fuel rail, also check under the vehicle, the fuel lie, tank, filler tube. The Internal Injector leak can only be checked after removal of the fuel rail (engine off). With the fuel rail in your hand have someone turn the key on (engine off) it should be a spray like pattern from each injector and no drips after the spray. NOTE: This should be checked only after there were no other issues found with the first issues I talked about. Hope this helps and please visit my auto-repair-website http://www.bigasautorepair.com/
no spark is from cam/crank position sensors faulty, faulty ignition control module
but you say fire to injectors -- do you mean power to injectors
if you have power but the injectors are not squirting---low /no fuel pressure = faulty fuel pump / no power to pump , faulty pressure regulator , pump relay problem
At this point check for a broken timing belt/ chain
There are three things needed for an engine to run:
If the car shut down suddenly without prior warning, and if the engine cranks over very fast (seemingly faster than normal), then my first guess would be a broken timing belt. This is bad because not only did you lose compression because the timing belt keeps the valves in sync with the pistons, that very fact means that the breaking of the belt most likely did internal damage to the engine in the form of bent valves. The very first thing you should do is to pull the plugs and do a compression check of the engine. If the cylinders are not all at the same level of pressure (within reason), or there is little or no compression in one or more cylinders, then the timing belt is gone. If compression is good, then the issue is either spark or fuel. Ensure spark is available by using a pair of insulated pliers to pull off one of the plug wires and hold it near the engine block. Crank the engine and watch for spark from the wire to the block. If there, you have spark. If not you must troubleshoot the cause. Fuel can be easiest or hardest to determine. Most vehicles have electric fuel pumps. Most have a "prime" function that occurs when first turning the key to the ON position. This allows the pump to bring the fuel rail to pressure for the injectors. Without starting the engine, turn the key to "ON" listen for a 3-5 second humming noise. This would be the fuel pump priming the fuel system. If you hear this you should have fuel to the rail. If you don't check the rail for fuel availability,.
I think the in-tank fuel screen(the "sock") has come off.This screen allows the pump to **** up the last bit of fuel in the tank.To verify,see if it does it with a full tank.You can either carry a 5 gallon gas can,or just fill it up all the way and try parking in a known uphill spot that causes the condition.If this isn't it,then youv'e got me as to what it is.
you probably have weak spark or it is flooding due to too high fuel pressure. is the timing good the firing order correct has the cam belt timing slipped, missing teeth. is the cold start injector open all the time.
try spraying some easy start into the air intake while someone operates the starter if it trys to start you have a fuel system fault have you checked fuel pressure at injector rail you need to do this using gauge and check against volvo spec if low it will never run if ok check feeds to injectors using multimeter if no feed check relevent fuses if ok using multimeter check continuety of injector wireing back to ecu if it did not try to start using easy start check timing belt is ok and engine has compression