1989 Jeep Wrangler Standard wont start

Whats a nutter bypass? these are none for a few things that cause a no start, the first is a fuelpump, try having someone crank the engine and at the same time beat on the bottom of the gas tank with a rubber hammer and see if it starts, if it does then pump is bad. the next thing to check is check and see if it has spark, if it does then it a fuel problem if it doesnt then i would check the coil and the pick inside distributor. start with these things first. good day.

Possibly fuel pressure regulator. Or the fuel pump is acting up.

The starter is most likely the problem,tap on the starter lightly with a hammer while trying to start the engine,dont get run over doing this it will take two people,if the engine starts,the starter needs replacing.

Sounds like the drainback valve inside the pump is shot...try just turning the key on and waiting a minute and see if it starts that way.

yes the crank sensor is probebly your problem.

Hi Dava224 i had the same problem with my 1989 CJ. when it was cold out i would pump the gas pedal 3-4 times before turning the ignition. it puts a small amount of fuel in the motor without stalling it out. it wont start as hard. another good idea is to keep some fuel stabalizer in the tank everytime you fill up. hope this helps

if you have an electric fuel pump that would explain the hum. unhook your incoming fuel line and blow the line clear, sounds like you've got some junk in your tank.it'll build up on the screen in the tank then fall off (at least partially) when your making turns or hitting bumps or holes. next time it's only got a gallon or so of fuel i'd drop the tank and check the pickup tube inside. sux but that's the only way to get to it. while you've got the tank off and out from under the jeep, might as well clean it out real good and replace anything inside (usually the screen) that doesn't look right, dirty etc. wouldn't hurt to run a bottle of fuel system cleaner in the next full tank of fuel either. preferably as soon as you put your tank back. good luck

are you sure you bought the right timing chain and gears? if the chilton says one things and you count differently then you could have bought the wrong set . just something to consider is all

I'm sorry, but I'm a bit confused regarding your statement where you said, "I drove it without a air filter for 4 days the put in a new one but it still wont start." Please clarify. Thank you, jetski224

This seems like a fuel pump or fuel filter prob. The pump more likely. Will it fire up with gas poured into the carb? If so the pump. If not, we will need to look for another prob. Don't buy parts you don't need! Frankster016