When I try to start the car it will crank but not tuned over to start the engin, some tell me fuel pump or filter and other say relay, I have 1999 Grand Cherokee and never has this kind of problem before, so it maybe a starter, if starter go out, engin still crank? I need to fix this soon please, help. and thank you again for your answer
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Re: Engin does not start
No starter is not problem if it is cranking normally, that is all it does....no spark or no fuel is likely...if there is an odd rhythm to the cranking pattern have timing and basic mechanical health checked (compression test/leak down/primary and secondary spark)..good luck
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Sounds like maybe the main computer is bad. When you cranked the engine there is not any indication that it is firing. If you have changed the fuel pump and coil and it still wont even fire, the computer is most likely the cause. Even if the timming was off you would still get some indication that it was trying to start although it probably would not if the timming was off, but the fact it's not even trying to fire yeah that's my take.
The easiest way to tell if your fuel pump is running is have someone inside the vehicle turn the key to the ON position... put your ear against the gas filler.. if you don't hear it buzzing your fuel pump is either bad or not getting power. If your fuel pump is bad, you will have to drop the fuel tank. be careful not to just let it drop down after you loosen the straps, this could lead to dammaged fuel lines.
TUNEUP? WHAT WAS CHANGED?NEED TO CHANGE WIRES,PLUGS CAP&ROTOR ELECTRIC COIL, CHANGE THE FUEL FILTER,IF STILL THE SAME?TAKE OUT THE FUEL FILTER IF WET THEN OK, BUT IF DRY THEN ,FUEL NOT GETTING TO THE ENGINE,CK WIRES TO AND FROM THE PUMP,STILL THE SAME THEN NEW PUMP
The pump does have a filter on it but you should also have an inline fuel filter somewhere underneath your car, Check the pump when you turn the ignition key on the pump should run for a second or two then shut off if you can hear it , it is working. It is rare for a vechicle not to have an inline fuel filter but there are some models that don't have one. The filters on the pumps usually don't stop up that often,it's pretty rare.I would try to replace the inline filter call and ask your local part store if they have one for it and you will know for sure. And usually if the crank sensor is bad it won't crank at all.
I'm not a Saab tech, but try the cold start injector if the car has one. It supplies extra fuel during a cold start. Maybe fuel filter or fuel pump. Maybe needs a tune up? If you have a friend to help, get a squirt bottle and fill it with gas. Have him spray it down the air intake after removing the air filter while you crank the engine. See if the car fires up. Ya might want to have a fire extinguisher close by if you try this, just in case. But it will tell you if the problem is fuel delivery related.