Question about 1997 Jeep Wrangler

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1997 jeep wrangler wont start

Fuel and volt gages stay in the off position with the key on and i get no spark to plugs.

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  • ponern Apr 26, 2009


    mcgyver468
    You had the right fix, thank you very much!!!!!

  • ponern Apr 26, 2009

    Thanks for all of your responses, I appreciate them very much!!!!

  • bigboyfl May 01, 2009

    Hey, I have the exact same problem on my 1997 2.5 jeep wrangler. Were you able to fix yours? How?

  • limegreentj May 11, 2010

    dead battery, or alternator, need more information, will it even try to turn over?

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I had same problem. Ended up having to replace ignition switch, then gauges and jeep started right up

Posted on Apr 25, 2009

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  • Master
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PCM wiring harness could have poor connection. wiggle wires to PCM with ignition on.

Posted on Apr 22, 2009

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2000 chevy blazer crank no start. I was told it overheated and has been parked ever since. (one year). I replaced cap, rotor, plugs and wires. wont start and only one code P0122. please help


I'm not sure about a Prius? If cranking rpms sound faster than normal, you need to check compression.
You may need fresh fuel? After it sat that long I may have pulled the plugs and tried the crankshaft by hand, plus add few drops of oil in each cylinder, before cranking.
I saw what you replaced, what testing have you done? Did you visually check for spark at the plugs, engine cranking. Key on engine off, did you use a gage and check proper fuel pressure, with the spider fuel system, 60--66 psi. After it is started it may run with about 10 psi less. Engine cranking you have fuel injector pulse?
The code is for throttle position sensor. Three wire connector, 5 volt ref--ground--signal. You can use digital multimeter to check signal wire, just turn on the key, move throttle by hand, watch the voltage, closed throttle .36--.96 voltage, wot 4.0 min. Voltage should move up and down smoothly.

May 16, 2017 | Cars & Trucks

Tip

Engine electricals




3) Spark: From battery to spark plug

The battery is the source of stored electrical power in the vehicle. A voltmeter between the terminals of a healthy battery should read 12.5 volts. A reading of 12.2 volts indicates a flat battery and a reading of 10.4 volts indicates a dead cell (each cell beingabout 2 volts). A battery should be capable of sustaining high current, as needed by the starter motor when turning the engine over. When the car is running the voltage measured across the terminals shouldbe between 14.2 and 14.5 volts. The value is the voltage being supplied to the battery by the output charge from the alternator. THis charging voltage should not alter much when additional load is applied to the battery (head lights on etc).
When the ignition key is turned to the second position,often referred to as 'key on engine off', all car functions are powered up including lights and fuel pump. When the key is turned to position 3 many ancillary functions are temporarily interrupted to allow the battery to meet the extra needs of the starter motor. Electrical charge from the starter switch passes through a master fuse and starter relay before energizing the starter solenoid. The starter solenoid moves the pinion gear on the starter motor to engage with peripheral teeth of the flywheel. Simultaneously, heavy copper contacts are bridged by this same movement causing the starter motor coils to become energized thereby turning the engine over.
During the ignition process electrical charge passes through the primary windings of the ignition coil(s). The engine control unit (ECU), taking signalsfrom the engine crank position sensor, collapses the field of the coil(s) appropriate to the cylinder requiring ignition. As the field collapses the secondary coil windings discharge very high voltage through the high tension lead to the spark plug. The charge is so high that at the spark plug gap the charge jumps across with a spark. The compressed fuel air mixture in the cylinder is ignited by this spark.
Checking the spark process starts with the plugs. The condition of the removed plugs reveals a lot about the nature of the ignition within the cylinders. Dark sooty deposits indicate overly rich fuel air mix and glazed plugs indicate overly hot lean mixtures. Removing the plugs (with the fuel pump relay unplugged) and holding the screw threads to the cylinder head whilst turning the engine over will reveal the quality of spark. The spark holders and leads should be examined for discharge through the insulation to the cylinder head. Removing the leads from the coil should reveal sparks emanating from the exposed connectors. Failure to see sparks at this point indicatesa failed coil (especially if neighboring coils show good spark) or a failed crank sensor if all coils show no spark.
NEXT 1.1 MAF Mass Air Flow sensor

on Jul 15, 2011 | Mercedes-Benz E-Class Cars & Trucks

1 Answer

1989 chev astro lights work changed the starter ,still won't start?


Make sure battery has a full charge and battery connections all good.
If it cranks good but won't start, have a helper crank it while you check for spark at the spark plugs, if spark everywhere, use a gage and check proper fuel pressure. Also check fuel injector pulse. Any applicable trouble codes?
If the starter motor won't even crank the engine? Two voltage circuits to starter motor, one comes from the battery, hot all the time. The other circuit goes hot with key in the start position and is probably wired through neutral switch for auto tranny. The starter motor grounds through engine block.

Mar 18, 2017 | Cars & Trucks

1 Answer

2000 ram 2500 5.9 gas motor. Drive down the road and it shuts off gauges are still on. No loss of electronics wont restart until the fuel gauge reads. New fuel pump tps and crankshaft position sensor.


When problem is ongoing, if it cranks good but won't start, have a helper crank it while you visually check for spark at the spark plugs. If spark everywhere, use a gage and check proper fuel pressure and fuel injector pulse.
How long since a tune-up? Any applicable trouble codes? At the moment, I'm not sure what the fuel gage has to do with it? You could check voltage and ground for the fuel pump and fuel gage sending unit. I haven't looked at any of your wiring, yet.

Apr 01, 2016 | Cars & Trucks

1 Answer

It dies while I'm driving it and I put it in park and it will not restart. What's wrong with it?


Could be a lot of things ! It could be ignition related or fuel delivery problem . Would have to test to say what is wrong for sure . Pull plug wires off one coil an crank the engine , turn the key to the start position. Do you see an hear a spark ? Buy yourself a fuel pressure gage an hook it up to the fuel rail test port an check fuel pressure . Could have a ignition control module problem , bad crankshaft position sensor , Fuel pump ,plugged fuel filter . Have you ever replaced spark plugs an wires , air filter , fuel filter ?

Dec 31, 2015 | 1997 Buick LeSabre

1 Answer

I replaced my positive battey cable but im still having trouble starting it. what could be the problem if i replaced the positive cable?


Were you having this problem before you changed the cable?
If it cranks good but won't start, have a helper crank it, while you visually check for spark at the spark plugs, if spark everywhere, use a gage and check fuel pressure. Also, check for fuel injector pulse.
Can you check for applicable trouble codes?

Nov 30, 2015 | 1997 Ford Explorer AWD

1 Answer

2006 monte carlo engine cranks but will not start


If it cranks good but won't start, have a helper crank it while you visually check for spark at the spark plugs, if spark everywhere, use a gage and check fuel proper fuel pressure. Check fuel injector pulse.

Check your security system.

Feb 22, 2015 | 2006 Chevrolet Monte Carlo

1 Answer

Jeep will crank but not fire, check engine light will not come on so I can get codes.


Need to check spark and fuel start by picking up a tester for the wires it plugs in like a spark plug and has a light that will come on if you have spark the next disconnect the main fuel line to the fuel rail and turn the key to the on position if u get fuel out of it the the pump is good

Jan 27, 2014 | 1997 Jeep Wrangler

1 Answer

I have a 98 Jeep Wrangler. Turns over but wont start. Tried starting by popping clutch, but just sputters.


when you turn the key to the run position do you hear the fuel pump run? do you know if you have spark?

Jan 27, 2013 | 1998 Jeep Wrangler

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