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I got a jeep 1994 zj 4.0l it has a problem when starting…

Customer Question
I got a jeep...

I got a jeep 1994 zj 4.0l it has a problem when starting after long periods of time it would turn on and then sputter and shuts off

Mechanic's Assistant: Will the headlights turn on? Is the battery fully charged?

Yes I just put in a new battery yellow top group 35 and also jus did a tune up. replacing the distributor cap got spark from the motor checked with multimeter. changed tho rotor spark plugs gapped at .035 and spark wires

Mechanic's Assistant: What is the model of your '94 Jeep?

Zj Laredo 4.0l

Mechanic's Assistant: Are you fixing your vehicle yourself? What have you tried so far?

Yes just medium level jobs charge a lot in Hawaii for labor on small stuff but I actually believe it has something to do with fuel pump reason when turn on car rite before cranking it over I wait 5 to 30 seconds depends on how cold it would have the light buzzing sound once that happens car can start normally but I just had a redone 3 months ago by a auto shop to big of job to do

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

If it would be the pcu/ecm if it could cause the problem because car runs normal if I let the fuel pump turn on first then its perfectly fine

Submitted: 10 months ago.Category: Jeep
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Answered in 1 hour by:
10/4/2017
Jeep Mechanic: Amedee, Jeep Technician replied 10 months ago
Amedee
Amedee, Jeep Technician
Category: Jeep
Satisfied Customers: 28,334
Experience: ASE certified Technician advanced level specialist. Wisconsin certified emissions state inspector
Verified

Hello and welcome!

My name isCustomerand I can assist you with your question.

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Jeep Mechanic: Amedee, Jeep Technician replied 10 months ago

Did you still need help?

Are you saying that the engine has a hard time starting after sitting for a while?

Have you checked the fuel pump or fuel pressure when this occurs?

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