How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask brownjeff Your Own Question
brownjeff, ASE Certified Technician
Category: Jeep
Satisfied Customers: 13886
Experience:  17 years experience, ASE certified, dealership certified, Service Manager for 15 years,
Type Your Jeep Question Here...
brownjeff is online now
A new question is answered every 9 seconds

1997 jeep grand cherokee laredo: replaced already ecm,cps, coil.

This answer was rated:

no fire 1997 jeep grand cherokee laredo. Thing replaced already ecm,cps, coil. why no fire
Hello and Welcome to JustAnswer,

My name is XXXXX XXXXX I am here to try and assist your with your question. Do you have voltage to the coil when cranking the engine?
Customer: replied 5 years ago.

green and orange wire to ground key on no bat positive

grey with white stripe key on no bat positive

Also no power when cranking the engine?
Customer: replied 5 years ago.
the engine will turn over no fire to the plugs
OK....When cranking the engine is the voltage to the coil. You mentioned with the key on and I want to know if voltage to the wires while cranking the engine?
Customer: replied 5 years ago.
let me verify you want me to check battery voltage to whicch wire to ground while cranking the engine. the grey and white or the green orange.
Customer: replied 5 years ago.
i am completely confused at this point the engine fired up while probeing the wires at the coil. I do not believe that we had a connection issue because we have connected and diconnected this connector several times. I dont know where to go at this point because i havent done anything to correct the problem but yet the engine is now working. I am a technician by trade working on gm 1.6 engines in large sweepers and floor scrubbers so i know problems that fix them selves have a history of coming back.
There was either a bad connection there or if you continue to have problems of no voltage the asd relay supplies the coil so would try another relay if the problem comes back.
brownjeff and other Jeep Specialists are ready to help you
Customer: replied 5 years ago.

i tried swapping the asd relay before contacting you. I moved the one from the horn postion i looked at the part numbers and they were the same i figured if i swapped them it would verify asd being good.


Then yes the relay would be good. The next thing to do when/if it acts up again would be with the key on see if getting voltage to the asd relay

Related Jeep Questions