Question about 1991 Mitsubishi Mighty Max

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My truck does not start. I changed the spark plugs and tested them for spark. That works. I changed the wires and rotor. I changed the fuel filter.

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Is fuel pump working, turn key to on listen for buzzing noise in gas tank, no noise means need pump, or check fuel pressure with fuel gauge , fuel check outlet looks like a valve stem on a bike located on fuel line near top of engine.

Posted on Mar 31, 2011

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2 Answers

It cranks, but why doesn't it always start?


What is year--make--model and engine size? The basics, if it cranks good but won't start, have a helper crank it while you visually check for spark at the spark plugs, gasoline engine. If spark everywhere, use a gage and check proper fuel pressure, also check for fuel injector pulse. Check cylinder compression.

Can you check for applicable trouble codes?

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MISFIRING AND I CAN'T FIGURE OUT WHY, DOES ANYONE HAVE AN ANSWER? NEW WIRES,NEW PLUGS,NEW CAP AND ROTOR AND CAP, NEW FUEL PUMP, NEW FUEL FILTER,


Hi Tom:
No make or model given so don't know type of ignition.
Would it be a big deal for you to do a compression test?
That might give a hint.

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Car cranks but won't start. please help any ideas


Depending on your vehicle, if it has a distributor. You may have to change it out completely. It happened to me. Changed everything and that was the last item. Worked after that.

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BAD COIL OR IGNITION MODULE INSIDE DISTRIBUTOR RUN OHM TESTS TO VERIFY

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Trying to trouble shoot why my performance is lacking or hesitating on my 1994 Jeep Grand Cherokee Larado? It has had a recent oil change, new plugs, air filter etc. all fluids are normal and I have no...


Change the following:

oil, tranny fluid, and filters: air filter and fuel filter as well. Fill up tank and add 1 can of SeaFoam. Change spark plugs, wires, coil wire if distributor is present - as well as cap and rotor.

If coil packs are present, repalce the plugs and wires, air filter, fuel filter, and have the catalytic converter tested to make sure it's not plugged. This test will also let you know if the O2 sensor(s) are bad or not.

Please let me know if you need any further assistance.

NOTE: start with the cheaper: air and fuel filter. Then work your way up.

carsandcomps,

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May 14, 2010 | 1994 Jeep Grand Cherokee

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1991 Honda Civic Won't Start


Try doing an ohms test on your fuel injectors. Sounds like 1 or 2 could be bad.

Jun 17, 2009 | 1991 Honda Civic

1 Answer

1997 jeep cherokee 4l will not start on petrol or lpg


Here are a couple of things that could be causing your problem. 1. Bad ignition coil or ignition module 2. Clogged fuel filter 3. Clogged air filter 4. Clogged fuel injectors 5. Bad spark plugs, wires, distributor cap and /or rotor. 6. Broken timing chain/belt. Here are a few things you can try to verify that you have a good spark. 1. Remove the distributor cap and crank the car. If the rotor turned you're ok. If it doesn't turn then that's you're problem and you will probably need to change a timing belt/chain. 2. Check the spark from the ignition coil by pulling the coil wire from the center of the distributor. Use an alligator clip to attach a short wire to the coil wire contact. Bare the other end of this short wire and set it up so it's sitting very close to the engine block. Turn off the lights and try to start the car. You should see a spark jump from this wire to the block. If you don't see a spark it's likely your ignition module or ignition coil is bad. 3. If you have a spark maybe it's not getting to the plugs. You may need to replace the distributor cap and rotor. You can test if the plugs are sparking by pulling one, re-attaching the spark plug wire and seeing if you get a spark when you try to start the engine in the dark. Please note, the metal threads of the spark plug need to be shorted to the engine block to complete the circuit during this test.

Jun 06, 2009 | 1998 Jeep Cherokee

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