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1998 Other Jeep Models the car runs for a while then shuts d

Tiny
IVANFELIX09
  • MEMBER
  • 1998 JEEP
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 136,841 MILES
The car runs but then shutsdown. The engine lost voltage in the primary cicuit that supplys the coil and injectors then in afew minutes it returns. I replaced the computer on the car and it worked perfectly for 15 days then it started shuting down again.
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Saturday, December 5th, 2009 AT 2:13 PM

5 Replies

Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Welcome, that primary voltage comes from the asd relay. Are there any trouble codes? Also, if the computer doesn't see the proper cam or crank signal, it may not ground the asd relay. I'd have to check circuits at the asd relay, without a code or something giving me a direction.
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Saturday, December 5th, 2009 AT 3:18 PM
Tiny
IVANFELIX09
  • MEMBER
  • 3 POSTS
Hello, I checked with the scanner and the codes read p0351, 1389, 1388
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Sunday, December 6th, 2009 AT 1:29 AM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
The first code is ignition coil, the next two, are for the asd relay. Check the asd relay circuits, voltage for the load side of relay is hot all the time. Voltage for control side of relay goes hot when you turn on the key. The computer grounds the coil side of relay in order to energize. If no ground, I always check the cam and crank sensor.
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Sunday, December 6th, 2009 AT 9:21 AM
Tiny
IVANFELIX09
  • MEMBER
  • 3 POSTS
Do you have a diagram of the electrical wiring
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Sunday, December 6th, 2009 AT 2:08 PM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
98 jeep cherokee, 4.0 litre engine. Asd relay


https://www.2carpros.com/forum/automotive_pictures/170934_asd_relay_98_jeep_cherokee_40_1.jpg

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Sunday, December 6th, 2009 AT 2:45 PM

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