# Stumped! On a Chevy!

**URL:** <https://community.cartalk.com/t/stumped-on-a-chevy/1976>\
**Category:** Maintenance/Repairs\
**Tags:** pump, sparkplugs, ignition, start, engines, gasoline\
**Created:** [July 20, 2007, 3:19pm UTC](https://community.cartalk.com/t/stumped-on-a-chevy/1976 "2007-07-20T15:19:31Z")\
**Posts on this page:** 5\
**Page:** 1

<div class="post-metadata">

**Author:** ![hoooch](https://avatars.discourse-cdn.com/v4/letter/h/aeb1de/32.png) [@hoooch](https://community.cartalk.com/u/hoooch)\
**Post date:** [July 20, 2007, 3:19pm UTC](https://community.cartalk.com/t/stumped-on-a-chevy/1976/1 "2007-07-20T15:19:31Z")

</div>

I have a chevy pickup 350 that sometimes starts with no problem and I can drive. Other times it does not start. When I test it, it does crank, I get a fuel in the carb, and it gets a spark.  
  
  
  
 Since this problem started I have change out the coil module and the ignition switch. What else causes intermittent problems like this???  
  
  
  
 Please respond!  
  
 Thank you!

---

<div class="post-metadata">

**Author:** ![system](https://global.discourse-cdn.com/cartalk/original/3X/1/d/1d47c66a543aa6c5a7873bb2320858f978ff52ed.png) [@system](https://community.cartalk.com/u/system)\
**Post date:** [July 20, 2007, 4:37pm UTC](https://community.cartalk.com/t/stumped-on-a-chevy/1976/2 "2007-07-20T16:37:24Z")

</div>

You don’t mention the year of this Chevy. If it is a distributorless ignition system, look at the cam position sensor. One way to narrow the problem is to use a timing light during cranking when it will not start and see if the #1 plug fires anywhere close to TDC timing mark. You may be getting spark but it may not be syncronized with the engine.

---

<div class="post-metadata">

**Author:** ![Loafer](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/loafer/32/28_2.png) [@Loafer](https://community.cartalk.com/u/Loafer)\
**Post date:** [July 20, 2007, 7:45pm UTC](https://community.cartalk.com/t/stumped-on-a-chevy/1976/3 "2007-07-20T19:45:27Z")

</div>

Next time it won’t start spay some ether down the carb and see if it will run on that. This wiil at least tell you if it is a fuel delivery issue.

If it runs on ether, and there is fuel in the float bowl, then the problem is the carb.

---

<div class="post-metadata">

**Author:** ![Loafer](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/loafer/32/28_2.png) [@Loafer](https://community.cartalk.com/u/Loafer)\
**Post date:** [July 20, 2007, 7:47pm UTC](https://community.cartalk.com/t/stumped-on-a-chevy/1976/4 "2007-07-20T19:47:12Z")

</div>

cam position sensor on carbed 350 chevy? 🙂

---

<div class="post-metadata">

**Author:** ![system](https://global.discourse-cdn.com/cartalk/original/3X/1/d/1d47c66a543aa6c5a7873bb2320858f978ff52ed.png) [@system](https://community.cartalk.com/u/system)\
**Post date:** [July 21, 2007, 4:35am UTC](https://community.cartalk.com/t/stumped-on-a-chevy/1976/5 "2007-07-21T04:35:57Z")

</div>

It is a 1985 chevy 1500 silverado 4x4! Thanks