Question about 1990 GMC C1500

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Need suggestions on how to fix my truck

Unplugged coil wire, when hooked back up, truck turns over but won't start. has gas... replaced coil, plug wires, distributor cap. can't find anyone to locate problem. don't have the money for the advise right now due to can't work with truck not starting.

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  • Anonymous Aug 20, 2008

    replace plugs points rotor checked fuses truck won't start but it seem like it's not getting any gas. disconnected gas line but gas is flowing don't know what what to check next

  • Anonymous Aug 22, 2008

    replaced plugs and coil truck is firing and getting gas through throttle body but still won't even try to hit

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  • 87 Answers

Check the wires going to the coil two sets on that one I believe they break easily

Posted on Jun 12, 2008

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1 Answer

Truck will not start


remove coil wire at distributor and plug a HEI GM tester spark plug to see if spark at ignition coil if not test ignition coil for current and signal not short to ground

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95 mustang, driving along and car just dies. wait 30 min s0metimes it will start and sometimes it wont. no spark. why?


Ignition modules and pick-up coils are pretty common on the older fords. When it doesn't start check for pulse at the coil. You can do this with a test light. Hook the lead wire of the test light to ground. Unplug the coil, turn the key on and see which of the two wires has power to it. Then plug the coil back in and back probe the wire that did not have power and crank the engine over. The test light should flash. If it does not than I old suspect the ignition module and would probably replace the pickup cl in the distributor for good measure. This was a fairly common symptom back in the day.

Jan 14, 2012 | 1995 Ford Mustang

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1997 Saab 900 SE Turbo. Problem repeats. Car is off the road. Had started up just fine, several days in a row, now it turns over just fine but does not start. Can hear the fuel pump pressurize. HAd done...


start with the basics: an engine with no internal problems (like timing belt broke, or valve train not timed) needs fuel and spark to start.Since your getting fuel up to the fuel rail to feed the injectors, lets assume for the moment that the injectors are working to put gas into the cyllinder (You coud check that by pulling a plug or two out and see if they are wet or smell of gas.) Then check for spark (Hold the metal tip of plug wire 1/4 inch from a metal bolt or ground on the engine. Careful you don't get a shock-you can also buy a spark checker for a few bucks. just put the plug wire on it and ground it with the clip. Then you won't get a shock.) If you see that it is getting spark, then you may need an expert diagnosis for why it won't run. If you do not detect any spark (might want to try more than one plug wire) then you need to diagnose your ignition. If your car has a distributor, take off the cap and check inside for a cracked dist. cap or bad or worn rotor. You may also have a bad ignition coil or ignition module (expensive, but not as expensive as a bad engine control computer. Distributorless ignition? Again, may be a bad coil, coil pack, or ignition module. good luck, i'm about out of suggestions.

Oct 04, 2011 | Cars & Trucks

1 Answer

Spark plug dia. to hook up plug wires on coil 3.8 pontiac


if you haven`t started replace one wire at a time and you won`t need a diagram for this.you can also go to the library and get a book for your car that will show you the location.if you look at the coils near the towers where the wires connect to they will have the cylinder number on them.the cylinder match on the coils is 1-4,3-5,2-6.

Aug 10, 2011 | Pontiac Bonneville Cars & Trucks

1 Answer

I replaced the Ignition Switch now I dont get any power Thru out the Car, I had power before Switch was replaced now I dont?? any Suggestions This is a 91' RS Camaro 5.0L.


You have missed hooking up a wire or hooked up a wire incorrectly.Do your interior lights work or does any thing at all work or is it that it just won't turn over. If it will not turn over it is probably because the factory anti-theft does not recognize the new key coding therefore will not allow the vehicle to start. It will have to be programmed for this vehicles computer. If their is no power at all to anything then you have missed hooking up a wire or hooked it up incorrectly or mistakenly unplugged another wire, Double check that all the wires are correctly plugged in and in the right place, Also check all you fuses sometimes when doing this kind of thing and the battery was not disconnected a wire could have shorted out and blown a fuse check all the fuses in the engine compartment and under the dash.

May 04, 2011 | 1991 Chevrolet Camaro

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My 99 Blazer was running fine when I parked it last night but today when i started it it idled ruff and the check engine light came on. I pulled the code and it said a misalainious misfire.So where do I...


I would suggest starting with the simplest things first, and that would be to pop the hood and if you can unplug and replug each one of the plug wires from the coils and what you need to pay attention to is a miss in the engine. If you remove one of the plug wires or coil packs and the engine runs the same, then the coil pack is bad and will need to be replaced. If there is a noticeable difference when you unplug the coil/wire then the coil is working and you should just move to the next one and do the same thing. If all is working correctly then you may have just gotten some bad gas, or possibly need to replace your fuel filter. Both of those will cause the same thing and give the same symptoms. Hope that helps

Jan 14, 2011 | 1999 Chevrolet Blazer

1 Answer

When i try to start the truck it does nothing no interior or exterior lights,doesnt turn over.if i jump starter relay it turns over but wont fir!!!any suggestions?


A firing problem can be one or more of several things:

The engine may not be getitng fuel.
The coil could by faulty.
If the coil is fine, the spark plug wires may need to be replaced.
The timing could be off.

To test if fuel is pumping to the carb, unscrew the incoming fuel line. It will be the one with a bulky silver connection attacted to a small tube leading into the front of the carb. Place a bottle over the end to catch gas. Have a buddy turn the engine over. Since the fuel pump is manual it should squirt gas out. If it does then you're ok. If not, you need a new fuel pump.

The coil can be tested by removing the middle wire from the distributor cap which is just behind the carb. The middle wire should lead to the coil. With the wire attached to the coil, hold the other end of the wire by the rubber boot and place it near a grounding surface such as the block of the engine. Have your buddy turn the engine over a couple times. If there is an arc from the wire to the motor then the coil is doing it's job. If not, you need a coil. You can test all spark plug wires using the same method except unplug the wire from the spark plug.

If the timing is off then the truck could be sparking before or after the gas is squirted in. The truck should still run, so check the other problems first, but your timing should be check by a mechanic when you get it running.

Hope this helps!

Jan 06, 2010 | 1984 Ford Ranger

2 Answers

2000 toyota tundra


Just remove an ignition coil that you know is good, with a good spark plug and hook up to the wire were the bad one was. Have someone start your truck up for you and if the spark plug fires then the ignition coil that you took off was bad. But before you do that just try a new spark plug that may be the problem.

Aug 31, 2009 | 2000 Toyota Tundra

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