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It starts and runs for about a minute then shuts off. I've…

Customer Question
It starts and runs...

It starts and runs for about a minute then shuts off. I've replaced the distributor, cap, rotor, plug wires, coil, crank position sensor, and had the ecm rebuilt. Also replaced the fuel pump and filter.

Mechanic's Assistant: Does the vehicle stall at low speeds? Does it sputter?

No it acts as if it just shuts off then won't start again for several hours

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

92 YJ

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

Yes, I've replaced just about everything. After I replaced the fuel pump it wouldn't start at all, then I sent the ecm in to be rebuilt and now it will start and run good but only for about a minute

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

I recently purchased the vehicle and it quit while driving it home and haven't been able to get it to run ever scence

Submitted: 7 months ago.Category: Jeep
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Answered in 4 hours by:
12/10/2017
Jeep Mechanic: Matt, Engineer replied 7 months ago
Matt
Matt, Engineer
Category: Jeep
Satisfied Customers: 23,309
Experience: Honors degree in Mechanical Engineering, worked 8 years as a Formula 1 engine engineer.
Verified

Hello and welcome to Just Answer

I'd say the next test is to run a power wire direct from the battery to the fuel pump so the pump runs all the time and see how this helps

if the Jeep then runs you know the issue is with the fuel pump power supply

if this doesn't help then I'd next check that the ECU is also getting a consistent power supply

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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

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