SPONSORED LINKS

Running rough and smells like gas/rotten eggs

Tiny
MIDORI95
  • MEMBER
  • 1996 CHEVROLET S-10
  • 2.2L
  • 4 CYL
  • 2WD
  • MANUAL
  • 163,000 MILES
Background: Truck was having a cylinder 3 misfire. Replaced spark plugs, works great after. Leave truck parked for a week without running, cylinder 3 misfire pops up again. Replaced spark plug wires and fuel filter. Cylinder 3 misfire, rough idle, going into third is too much and smells like gas/rotten eggs. Lots of shaking when turning air on. Anything else to look at?
SPONSORED LINKS
Saturday, January 9th, 2021 AT 8:29 PM

7 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning,

I would start by checking the compression to be sure there is no internal issue.

https://www.2carpros.com/articles/how-to-test-engine-compression

https://www.2carpros.com/articles/engine-misfires-or-runs-rough

Can you give me the code numbers that were set?

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Roy
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Sunday, January 10th, 2021 AT 8:05 AM
Tiny
MIDORI95
  • MEMBER
  • 4 POSTS
Thanks for the response Roy! I will look into getting the compression test. As for the code it is P0303.
Was this
answer
helpful?
Yes
No
Monday, January 11th, 2021 AT 5:36 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Thank you. The 303 indicates number 3 cylinder misfire.

Let us know the results of the compression test.

Roy
Was this
answer
helpful?
Yes
No
Monday, January 11th, 2021 AT 7:17 PM
Tiny
MIDORI95
  • MEMBER
  • 4 POSTS
Here are the results from the compression test:
Cylinder-PSI
1-137
2-135
3-110
4-93
Was this
answer
helpful?
Yes
No
Saturday, January 16th, 2021 AT 7:56 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Thank you.

Number 4 cylinder is the issue. Number 3 is close behind.

https://www.2carpros.com/articles/symptoms-of-low-compression

https://www.2carpros.com/articles/the-reasons-for-low-compression

You may have either bad valves or piston rings.It would be better to consider replacing the engine with a good used motor than repairing this engine.

Roy
Image (Click to make bigger)
Thumb
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
+1
Saturday, January 16th, 2021 AT 8:17 PM
Tiny
MIDORI95
  • MEMBER
  • 4 POSTS
Thank you, I appreciate the guidance!
Was this
answer
helpful?
Yes
No
Saturday, January 16th, 2021 AT 8:25 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
You are welcome.

Always glad to help.

Roy
Was this
answer
helpful?
Yes
No
Saturday, January 16th, 2021 AT 8:27 PM

Please login or register to post a reply.

Related Engine Runs Rough Content

Code Read Retrieval/Clear Chevrolet
VIDEO
Code Read Retrieval/Clear Chevrolet
Instructional repair video
Check Engine Light
GUIDE
Check Engine Light
Why is my check engine or service engine soon turned on? In this guide we talk about what this is associated with this notorious light, what it is used for and what you...
VIEW MORE

Sponsored links