# 2002 Ford Taurus - Misfire #3

**URL:** <https://community.cartalk.com/t/2002-ford-taurus-misfire-3/137609>\
**Category:** Maintenance/Repairs\
**Tags:** ford\
**Created:** [March 31, 2019, 2:54pm UTC](https://community.cartalk.com/t/2002-ford-taurus-misfire-3/137609 "2019-03-31T14:54:02Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![ShannonMeisel](https://avatars.discourse-cdn.com/v4/letter/s/ed655f/32.png) [@ShannonMeisel](https://community.cartalk.com/u/ShannonMeisel)\
**Post date:** [March 31, 2019, 2:54pm UTC](https://community.cartalk.com/t/2002-ford-taurus-misfire-3/137609/1 "2019-03-31T14:54:02Z")

</div>

Help! We bought a “granny car” with 62000 miles on it but it has developed a deadly misfire on cylinder #3. We have replaced the spark plugs and wires, ignition coil, alternator and fuel injector and the battery. Every time the misfire re-starts. We have noticed it seems to happen AFTER we have opened the hood to check something else and then slammed it shut. Is this knocking the spark plug and/or wire loose? Thanks.

---

<div class="post-metadata">

**Author:** ![db4690](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/db4690/32/2583_2.png) [@db4690](https://community.cartalk.com/u/db4690)\
**Post date:** [March 31, 2019, 4:08pm UTC](https://community.cartalk.com/t/2002-ford-taurus-misfire-3/137609/2 "2019-03-31T16:08:42Z")

</div>

Before you replace any more parts . . .

Compression test, and post the results

Those parts you installed . . . high quality or store brand parts of unknown origin and quality?

---

<div class="post-metadata">

**Author:** ![ShannonMeisel](https://avatars.discourse-cdn.com/v4/letter/s/ed655f/32.png) [@ShannonMeisel](https://community.cartalk.com/u/ShannonMeisel)\
**Post date:** [March 31, 2019, 8:55pm UTC](https://community.cartalk.com/t/2002-ford-taurus-misfire-3/137609/3 "2019-03-31T20:55:38Z")

</div>

Everything but the alternator was a factory part. The alternator was after-market.