Misfire or surging

2000 SAAB 9-3 SPORTCOMBI

152,000 MILES • 2.3L • 4 CYL • 2WD • MANUAL

FRANK J TRIVIGNO

MEMBER
7 POSTS
FOLLOW

When I accelerate I feel some surging. It is showing a few faults. P1110, P0442,P1303 and P0303 most of my research says they are related to the misfire on cylinder 3. But some insight as to a starting point, other than changing the plugs? I have a new set and will be doing that first.

Oct 3, 2021 at 8:47 AM

KASEKENNY

CERTIFIED EXPERT
18,907 POSTS

These can be related to the cylinder 3 misfire except for the P0442 which is an evap leak code. Here is a guide that will help with this:

https://www.2carpros.com/articles/evap-system-code-repair

However, this would most likely not cause what you are seeing but the misfire code would. So, I would suggest starting with that.

Here are a couple guides that will get us started:

https://www.2carpros.com/articles/engine-surges

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

Below you will find the info from the manual on these codes.

If you are going to change the plugs that is a good place to start so if you can get some pictures of what they look like that will help us figure out what is happening.

Below you will find the info from the manual but also a chart on what plugs look like when there is an issue. The P1303 is a misfire that is damaging the converter so I suspect we will find the plug is completely fouled and requires replacement before we go too much further so let us know what you find.

Thanks

Images (Click to enlarge)

Oct 4, 2021 at 12:02 PM