Question about Jeep Cherokee

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No spark , no gas pressure - Cherokee Jeep Cars & Trucks

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  • walter haupt Sep 23, 2008

    have no spark no fule i no dist. is good full pump is good what could it be?crank censer

  • mykcrone Sep 23, 2008

    yeah i just installed a good used 242 in my jeep. everything is hooked up and i have no fuel or fire at all. i have done this many times before on other vehicles and never had both problems at once. what could it be? just for a note the jeep engine i had in it blew going thruogh a huge mud hole and the jeep stoped dead in its track. so maybe a impact switch but i dont know where it is and would that cause both not to work

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There may some problem in the spark plug or else the dleta connection side of the engine is not proper.

Posted on Jul 28, 2008

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What kind of vehicle? If it has spark and fuel it should start. Check timing belt if equipped

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Engines only need three things to run provided they are in running order. Another words of the timing is correct and the combustion is correct. Gas, air, spark. If you are sure you have gas in the carb or throttle body then I would check power at your coil. If that's alright then pull a spark plug wire and put a screwdriver in the plug wire and with the other end of the team screwdriver near a groung try to start the 's. Here should be a spark

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Gas Guage bouncing strong gas smell before 1998 Chevy Blazer wouldn't start at all. Engine still turns over


Check your fuel pressure, if low or no pressure, replace fuel filter first. My guess is the fuel pump and sensor are bad. You may also want to see if your getting spark, but I don't think bad plugs would make has gage jump around, but if they are not sparking correctly they will allow gas to flood the motor and that's when you get the gas smell

May 29, 2014 | Cars & Trucks

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WHEN I GIVE IT GAS IT START TO MISFIRE


Misfires are caused by one of 3 things-gas, spark, or compression-one of those is the problem. For gas, check the fuel pressure and see if it is at the right pressure for your car. Low fuel pressure will cause misfires. If pressure is good, it could still be an injector problem, like a clogged injector. If low pressure, suspect the fuel pump or the fuel filter.
For an ignition spark problem, check your spark plugs. Pull them out and inspect them for broken or cracked plugs, check the spark plug gap, check for oil fouled plugs. You may be able to isolate the misfire to a cylinder or two by the plugs condition. A misfiring plug or cylinder should show more black, sooty deposits than the other plugs. A normal firing plug will have a tan or brown colored insulator on the end with very little deposits. If the plugs are okay, clean them a bit if needed, and check for spark on the spark plug wire ends with engine cranking. Buy an inexpensive spark tester, or hold each spark plug wire metal end terminal 1/4 inch from a ground on the engine block, while cranking the engine. Wear a heavy glove to avoid getting shocked. Check that every cylinder is getting a strong blue spark to eliminate ignition as a problem. A weak, yellow or orange spark is an ignition problem, possibly a bad coil, or other ignition part.

If spark and gas is good, you may need to check engine compression. Any cylinder that has significantly lower compression than the other cylinders will cause a misfire, and set a misfire code. You should check for any trouble codes in the engine computer. A code reader or scanner would have to be connected to the diagnostic connector under the dash. What is "significantly lower" compression? About 15-20% less compression. Say you checked and had 150 psi compression in most cylinders. If one had 20% lower compression ( 150 X 20%= 30 psi, 150 -30 =120 psi, or same as saying 150 X 80%= 120 psi.), a condition like that can cause a misfire. I hope I have made sense here. Good luck, and post back what you find, or if any questions.

Apr 10, 2014 | 1998 Ford Windstar

1 Answer

My lumina won't start it will start from the


Sudden no starts are usually gas or ignition related. That's why the mantra check for spark and check for gas. If you check for spark at a spark plug and have a blue snapping spark, the ignition is probably good. To check for gas, best to check fuel pressure, as high fuel pressure against the injectors ensures that proper amount of gas will be sprayed out by the injectors. Do you hear the fuel pump buzz on for a couple of seconds when the key is turned to on? If not, try banging on the bottom of the gas tank to see if pump will work. If it does, you will need to replace the pump-may work a couple more times by tapping on the tank, but the pump is basically gone.
If gas and spark is present, one would next need to check the injector circuit.
If spark is absent or weak, it could be the crank position sensor, ignition control module (under the coil pack), cam position sensor, or the pcm.

Sep 22, 2013 | Cars & Trucks

1 Answer

Car wont start


could be few different problems first u need to check for fuel pressure and spark
hook a fuel pressure gauge up and see if ur getting any fuel pressure if you have no fuel pressure u either have bad pump or out of gas (don't laugh i had cars come in shop for a no start that where just out gas)
if u have fuel pressure
then check for spark
take one spark plug wire of a spark plug and hold wire about 1/4 inch away from either the spark plug or engine block if u see a spark or hear one
if you have no spark your looking at a few different possibles Bad coil, ignition module, crank sensor, etc
if you have fuel pressure and spark but still no start u need to check for injector pluse (basically computer telling fuel injectors to open)
but now i think I'm getting over your head let me know if this helps and i try to walk u threw other things if this dont help

Jan 04, 2013 | 1997 Oldsmobile Achieva

1 Answer

2003 kia Sedona won't. start


If this is a sudden occurrence and nothing suspicious happened prior, you most likely lost either gas or spark to the engine. You need to check for both.

Do you hear the fuel pump in the gas tank buzz on for a couple of seconds when you turn the ignition key to ON? Unless the fuel pump turns on and puts gas under high pressure at the fuel injectors, the engine cylinders won't get gas to start. Correct fuel pressure is crucial to know if you have a fuel pump (or fuel filter) problem. If the pressure is correct, it is probably not a fuel problem but a spark problem, although there are less common instances where a fuel injector circuit may malfunction.

The ignition system not producing spark at the spark plugs is the other common problem of no starts. Buy a cheap spark tester at a parts store, plug it into one of your spark plug wires, then crank the engine over and watch for a strong blue spark. You might need a helper to do this. If you see a consistent spark, the ignition system is probably good, although you should probably check more than just one plug wire-sometimes one bad ignition coil in a coil pack will cause no starting. Good luck.

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3 Answers

95 mitsubishi eclipse will turn over but isn't starting. checked ignition coil and fuses. Any thoughts?


is there spark ? and is it getting gas ? have you checked all the fluid levels etc...could be the fuel filter ,pump ? do you hear anything such as the fuel pump operate when you turn the key to the on position ?
open the hood and visually inspect any Obvious issues as wires off or and vacuum lines dry-rotted check the air filter .....but first check for spark and gas

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Hmmm well to start the pressure in you gas pedal comes from your throttle body, not your spark plugs. Secondly, there is only one cable going to your gas pedal, the other one is your cruise control cable.

Repair your throttle cable, or the spring on your throttle body is broken. it should be a fairly easy thing to fix.

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