# Odd starting noise ‘93 F250

**URL:** <https://community.cartalk.com/t/odd-starting-noise-93-f250/126264>\
**Category:** Maintenance/Repairs\
**Created:** [October 6, 2018, 4:02pm UTC](https://community.cartalk.com/t/odd-starting-noise-93-f250/126264 "2018-10-06T16:02:16Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Hobby\_welder](https://avatars.discourse-cdn.com/v4/letter/h/3bc359/32.png) [@Hobby\_welder](https://community.cartalk.com/u/Hobby_welder)\
**Post date:** [October 6, 2018, 4:02pm UTC](https://community.cartalk.com/t/odd-starting-noise-93-f250/126264/1 "2018-10-06T16:02:16Z")

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Hi folks, I need help figuring out what I might be hearing.

When I go to start my truck, I hear what I can best describe as a knocking or skipping. Its only when I start the truck, I think the starter is going bad considering I recently fixed all wiring issues and I have a brand new battery, alternator, and connections.

Aside from the starter, what else might cause this sound? Bad spark plugs? I did have a code 172 (HEGO lean, need a new O2 sensor) could this be its doing?

If i could upload a video I did get the sound recorded.

On a side note; I fixed the last starting issue, which was the clutch master cylinder and thats been working great. And this sound is about a day old.

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**Author:** ![Hobby\_welder](https://avatars.discourse-cdn.com/v4/letter/h/3bc359/32.png) [@Hobby\_welder](https://community.cartalk.com/u/Hobby_welder)\
**Post date:** [October 6, 2018, 4:05pm UTC](https://community.cartalk.com/t/odd-starting-noise-93-f250/126264/2 "2018-10-06T16:05:10Z")

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One other note, it only does this when cold. I was just checking my code reader ans let the engine warm up, once I went to start it again it didn’t make the noise

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<div class="post-metadata">

**Author:** ![Hobby\_welder](https://avatars.discourse-cdn.com/v4/letter/h/3bc359/32.png) [@Hobby\_welder](https://community.cartalk.com/u/Hobby_welder)\
**Post date:** [October 6, 2018, 4:27pm UTC](https://community.cartalk.com/t/odd-starting-noise-93-f250/126264/3 "2018-10-06T16:27:37Z")

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Key on engine off gives me an all clear, key on engine running won’t read the wide open throttle test. It also flashes the check engine light when I try (code reader causes this).

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**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\
**Post date:** [October 6, 2018, 7:01pm UTC](https://community.cartalk.com/t/odd-starting-noise-93-f250/126264/4 "2018-10-06T19:01:34Z")

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If the truck has an automatic transmission, a cracked flex plate can make a knocking noise when starting the engine.

Tester

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<div class="post-metadata">

**Author:** ![Hobby\_welder](https://avatars.discourse-cdn.com/v4/letter/h/3bc359/32.png) [@Hobby\_welder](https://community.cartalk.com/u/Hobby_welder)\
**Post date:** [October 6, 2018, 8:40pm UTC](https://community.cartalk.com/t/odd-starting-noise-93-f250/126264/5 "2018-10-06T20:40:57Z")

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I have a manual tranny.

After some looking, I think i may have a bad spark plug or distributor wire. If its not that when ill hand it over to a shop, pulling the engine apart is a little out of my league