Question about 1994 Buick Roadmaster

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No ignition wont start

Check ignition coil wiring harness. replace distributor and electronic module.

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Are you getting fire but still no start? Check for fuel delvery. If no fuel delivery at the shrader valve. then check the fuel pump. If you don't hear the hum of the fuel pump when in the "on"position, replace it.Also make sure you have power at the constant 12v at the coil and distributor. If no power is present you may have a faulty ign. switch.

Posted on Jun 20, 2008


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Jeep wont start.Have replaced ecu,coil,crankshaft sensor and wiring harness.Still no power to coil i have 1991 jeep wrangler 2.5 manual 4x4

Check the wiring going to the coil. If you installed an alarm on that vehicle disconnect the main power wire to the alarm to disable the ignition kill circuit. Locate the ignition relay located on the drivers side fender wall or in the power distribution box under the hood and test it. finally, there is a fuse on the interior fuse panel that will give you this condition. I do not have the exact location so check all fuses in the panel and replace any blown fuses.

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My 1985 2.5 s-10 wont spray gas through the throttlebody but pumps from the fuel pump what would make it do this i can straight wire it to the battery and it will spray someone told me it could be the...

Using a test light, and with the ignition key in the "On" or "Run" position check for full battery voltage at the (+) positive side of the ignition coil, and then check for full battery voltage at the wire connector to the distributor for the wire that runs between the (+) positive side of the ignition coil and the distributor. (dis-connect the wire connector from the distributor to test) If full battery voltage is present at the (+) positive side of the ignition coil but not through the ignition coil to the distributor then replace the ignition coil. If full battery voltage is present at both the ignition coil and the distributor then remove the ignition module from the distributor to have it tested and most auto part stores will test it for you for free. The ignition module is what generates the signal that the ECM uses to time and fire the fuel injectors, and be certain that the ignition module is installed into the distributor using a silicone grease or some other die-electric compound to completely cover the metal mounting surface of the ignition module because it is a heat-sink, and be careful not to over-tighten the ignition module or it can be damaged. There is also a hall-effect switch inside of that distributor that would be the next suspect if the ignition module tests out alright, and if there is no spark there is a pick-up coil/stator assembly that could be faulty and if that is the case then replace the entire distributor because the distributor will have to be removed and dis-assembled to replace the pick-up coil/stator assembly.





Nov 30, 2010 | 1985 Chevrolet S-10 Blazer

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I think SWOOP needs to check the car year poster said 2003, I don't know where my distributor would be, lol. And I think I've got coil PACKS not a coil, lol.

Doesn't anyone know the nissan proceedure to check for spark in a 2003 Sentra 2.5?

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I have a 84 potiac fiero 4 cyl and the multi port injector wont spray when trying to start. I tested it with two wires to the batery and it works, but the wires coming out of the harness wont turn the...

Be careful putting 12 volts to the injector harness,it will burn the e c m out.The module in the distributor,and the pickup coil work together to pulse the injector and energize the coil.The ignition module is most likely the problem,but the pickup coil in the distributor,would be my second choice in the two.See if it has spark,or spray a little bit of starting fluid in the intake,not much,if it fires,and tries to run,replace the module,and the pickup coil.If it has no spark,the module replacement will be all that is needed.

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If there is no spark at any plugs, you need to check the coil and the ignition module. If you are getting spark to some of them then check the wires and distributor cap.

Mar 30, 2009 | 1997 GMC Jimmy

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Have a 1989 f250 that will turn over when turning the key but wont fire, we can't any spark from the plugs. we've checked all the fuses and relays and can't figure out why it wont start.

It sounds like the TFI Module may be defective, this is the heart of the ignition system, it is a black or grey module with about 6 wires plugged into it on the side of the distributor (it may also be mounted on a finned heat sink on the inside of the left front fender), In rare cases it is the another ignition componet like the ignition coil or distributor stator, make sure you check the coil wire and the distributor for any signs or of being damaged (dist cap and coil lead need to be replaced), white powder on ther coil or distributor terminals is the give away of damage.

Also perform the following test, check with a 12 volt test light: On the coil primary ( connector at coil) there are two wires, one is red. Make sure you have voltage at this wire with the key on, then probe the other wire, usually green, crank the engine and this circuit should blink. If it doesn't, make sure the distributor turns, if it does then replace the ignition module and the stator inside the distributor.

I recommend you use Motorcraft or Ford parts. The aftermarket modules can be a problem as far as reliability. If the distributor rotor doesn't turn when you crank the engine, then you may have a timing gear problem

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