Question about 1994 Volvo 850

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Will not start.

No problem to turn the engine, but engine will not fire up, no egnition on spark plugs, altenator checket ok, distrub checked ok, and fuses ok.

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  • 426 Answers

Sounds like ignition module but could be immobiliser if fitted check that you have a good and constant power supply to the distributor/coil also check that the rotor button inside the distributor cap is still servicable <carbon button>

Posted on Oct 08, 2008

  • tony yeatman
    tony yeatman Oct 10, 2008

    have you turned over engine with distributor cap off to see that the rotor is turning

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Spec vin ecu specs


If it turns, then the battery is OK. Either spark plugs are not firing in proper order (wrong firing order), no power to spark plugs, or no fuel because of fuel restrictions (dirty fuel filter). Inspect the air filter to ascertain its not clogged air. If you smell gas, then you saturated the spark plugs, which is why it refuses to run.
Let it sit for half hour to let spark plugs dry. Inspect to ascertain its not dirty spark plugs, which will also prevent engine from running. After ascertaining its proper firing order, spark plugs are clean, and there's power to distributor cap, ascertain there's fuel in fuel lines by squirting half second (short squirt) of starting fluid into air filter. Close the air filter housing to trap flammable starting fluid gas. Turn engine without giving throttle. Let starting fluid be ignited by spark plugs. If it won't start, then spark plugs are not firing to ignite starting fluid gas. If it starts briefly, but won't run when you give throttle, but catches when a 2nd person squirts more starting fluid into air filter just before engine stalls, then its a fuel restriction issue or no fuel in fuel lines.

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TOYOTA CELICA TURNS ON BUT DOES NOT START??


(THERE,S NUMBEROUS WAYS WHY IT WILL NOT CRANK ) NO1 CHECK TO SEE IF IT,S GETTING GAS , THERE,S A PRESSURE RELEASE VALVE LOOKS LIKE A TIRE STEAM WITH A BLACK CAP ON IT PRESS IT IN WITH PHILLIP SCREW DRIVER AND IF THE GAS SHOOT OUT IT,S GETTING GAS ) NO.2 TAKE A OLD SPARK PLUG ,DISCONNECT ONE OF YOUR SPARK WIRES AND CONNECT TO THE LOOSE SPARK AND TURN THE CAR OVER TO SEE IF IT,S GETTING FIRE ,AND IF IT,S NOT GETTING FIRE TO THE PLUGS IT,S YOUR CRANK POSTION SENSOR ,AND IF IT,S GETTING FIRE TO THE PLUGS . TAKE A TEST LIGHT WITH THE SWITCH TURN TO ON AND IF IT LIGHTS UP THAT MEAN THE CRANK POSTION SENOR IS WORKING ,BUT IF YOU ARE GETTING FIRE FROM ALL OVER THERE,S ONE THING TO CHECK AND THATS YOUR DISTRUBATOR ,STICK THE TEST LIGHT IN WHERE ONE OF THE SPARK WIRES ARE AT AND IF IT LIGHT,S UP THE DISTRUBATOR IS BAD ,AND JUST REPLACE IT ,OR CHECK FOR YOUR FUSE RELAY TO YOUR FUEL PUMP AND THAT SHOULD DO IT

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You have a timing problem. Check for loose/broken belts. also see if the distributer cap is worn out or cracked. Replace it if it looks worn out. Change spark plugs....
Sounds like a typical ignition problem. If your handy, you can do this all yourself.
Change plugs wires and distruber cap.

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I have a 1988 chevy truck and it will not start now, i shorted out the starter and it burned the negative cable wire so i unhooked it and replaced the starter solenoid and replaced the egnition module,...


Is the engine turning over and just not starting? Go back to basics, you need fuel, fire, compression, and proper timing to get it to start. Check the fuel pump, do you hear it run when you turn the key on? Do you have fuel pressure, if so check for spark at the spark plugs, if you have spark try turning the engine over and have a buddy spray some starting fluid in the throttle body, if it tries to start then you have a fuel problem. If no fire check dist module, ign coil and coil wire.

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possibly distributor cap getting wet. Try this. When it's not starting, remove distributor cap and dry inside and outside with hair dryer on warm setting. See if it starts then. If yes, replace cap and rotor and make sure plug wires are clean.
If it still doesn't start, you may be getting mositure in a wire connector that operates spark to plugs.

Are you getting spark at plugs when it own't start?
Check by getting a spark plug and plugging a spark plug wire into it and grounding the side of the plug. crank engine and watch for spark at gap.

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1 Answer

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keemo68 is right, I had the same prblm and it was one of the relays. There are 4 relays located under the hood, passenger side, just above the wheel. They're quite cheap so buy one, then replace the first one, if still not ok put it back in place and try to replace the second one, til you find the defective one. Think I've paid $5-$6 in a wholesale electronics parts, they're quite standard.

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