# 2000 chevy suburban

**URL:** <https://community.cartalk.com/t/2000-chevy-suburban/25385>\
**Category:** Maintenance/Repairs\
**Created:** [January 23, 2009, 12:53pm UTC](https://community.cartalk.com/t/2000-chevy-suburban/25385 "2009-01-23T12:53:00Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![3naye1](https://avatars.discourse-cdn.com/v4/letter/3/f07891/32.png) [@3naye1](https://community.cartalk.com/u/3naye1)\
**Post date:** [January 23, 2009, 12:53pm UTC](https://community.cartalk.com/t/2000-chevy-suburban/25385/1 "2009-01-23T12:53:00Z")

</div>

Vehicle misfires. Autozone says it is random cylinder misfire code po300 and fuel pressure high or low / fuel circuitry high. I changed the spark plugs and spark plug wires checked good. The problem seems to be getting worse. What could possibly be the problem.

---

<div class="post-metadata">

**Author:** ![jiffyguy](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/jiffyguy/32/1107_2.png) [@jiffyguy](https://community.cartalk.com/u/jiffyguy)\
**Post date:** [February 5, 2009, 11:17am UTC](https://community.cartalk.com/t/2000-chevy-suburban/25385/2 "2009-02-05T11:17:23Z")

</div>

i have a 99 suburban with the same problem it turned out to be the mass air flow sensor even though the code read random cylinder misfire. i also had my catylic converter changed as well in case there were any blockage in there. all in all it seemed to help

---

<div class="post-metadata">

**Author:** ![texases](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/texases/32/862_2.png) [@texases](https://community.cartalk.com/u/texases)\
**Post date:** [February 5, 2009, 3:07pm UTC](https://community.cartalk.com/t/2000-chevy-suburban/25385/3 "2009-02-05T15:07:42Z")

</div>

When I had s similar problem on my '95 it was the spark plug wires shorting out. How did they check the wires?