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Will not start after replacing fuel pump and code 42

Tiny
ERICLEE
  • MEMBER
  • 1992 JEEP GRAND CHEROKEE LAREDO
  • 4.0L
  • V6
  • 4WD
  • MANUAL
  • 223,000 MILES
Replaced the fuel pump but now fuel gauge won't move at all. It won't start even if I put fuel straight in the carburetor. It show code 42 which is auto shut down. If the fuel gauge isn't coming on but that keep the engine from starting.
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Saturday, January 4th, 2020 AT 9:55 AM

3 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good afternoon,

The most common cause for this is the ECM itself as it controls the ASD.

I attached a test chart and diagram for you to view.

Roy
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Saturday, January 4th, 2020 AT 10:25 AM
Tiny
ERICLEE
  • MEMBER
  • 4 POSTS
Okay, now the check engine light and the shift indicator light stay lit up. I can no longer check for fault codes is this another sign of a bad ECM. Thank you for your time and advice it's greatly appreciated.
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Monday, January 6th, 2020 AT 6:53 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Yes, did you follow the flow chart?
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Monday, January 6th, 2020 AT 7:14 PM

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