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OBD codes 14 and 34, Engine turns over fine, but not a hint of firing?

Tiny
SDPLASKO
  • MEMBER
  • 1989 MERCURY GRAND MARQUIS
  • 5.0L
  • V8
  • 2WD
  • AUTOMATIC
  • 100,000 MILES
Engine turns over fine, but not a hint of firing. OBD codes 14 and 34.
Tuesday, May 23rd, 2023 AT 9:44 AM

3 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
I would replace the MAF and coolant sensors here is what is said about the codes:

OBD Code 14: This code indicates a problem with the Engine Coolant Temperature (ECT) sensor or circuit.

OBD Code 34: This code indicates a problem with the Mass Air Flow (MAF) sensor or circuit.

Please let us know what happens.
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Tuesday, May 23rd, 2023 AT 1:45 PM
Tiny
SDPLASKO
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  • 2 POSTS
Thanks for your input. I will update you with the results.
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Wednesday, May 24th, 2023 AT 12:25 AM
Tiny
KEN L
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Thank you.
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Thursday, May 25th, 2023 AT 4:59 PM

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