4.0

definitely annoying
Typical Repair Cost:
$30
Average Mileage:
136,750 miles
Total Complaints:
1 complaints

Most common solutions:

  1. replaced bosch spark plugs with ngk (1 reports)
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problem #1

Sep 012009

F-150 XL 4.2L

  • Automatic transmission
  • 136,702 miles

My Ford mechanic installed Bosch Spark Plugs four years ago. I found a forum that said these plugs won't run in f150 trucks. The truck idled so bad I thought the motor would fall out. The mechanic fulled all kinds of codes and said it would cost huge money to fix a manifold leak. After installing the NGK plugs it has never run better. Also noted these Bosch plugs were OK for the first 30,000 KM and failed the last 25,000 KM.

- Dan S., Ottawa, ON, canada