Engine compression reading and misfiring - Saab 9-3SS Bulletin Board - Saabnet.com
The banner above is an advertisment - if it asks you to download software, please ignore.
Site News - 4/9 Saab Owners' Convention Day Pass Raffle | 3/26 M Car Covers (by State of Nine)
[General | Members | C900 | 9000 | NG900 & OG93 | 93 | 95 | NG95 | 99 | Sonett | Vintage Models | Clubs | Other Cars | FAQs | Gifts | Member Photo Galleries | Member Directory | Classifieds | Manuals | *Buddy Registry | *Mileage Registry | Polls | What's New | Raffle | Photo of the Month | Sponsors]

93 Bulletin Board
2003-2011 [Subscribe to Daily Digest]
(Search Author's Posts: e.g. Keyword:username)*Members Only

[Main 93 Bulletin Board | BBFAQ | Prev by Date | Next by Date | Post Followup ] Member Login / Signup - Members see fewer ads. - Latest Member Gallery Photos
Engine compression reading and misfiring
Like This Post: - Subscribe to Daily Digest for this Bulletin Board
Posted by Michel_DDO [Email] (#2328) [Profile/Gallery] (more from Michel_DDO) on Mon, 9 Apr 2018 20:29:16 Share Post by Email
Alert me when someone posts in this thread:
Members do not see ads below this line. - Help Keep This Site Online - Signup

Hi, I have a 2006 2.0 liter SAAB automatic and 208 000km on the counter.
Two weeks ago, I saw the check engine light but the car was driving fine. My mechanic changed all four coils and checked my spark plugs and they were ok. But the engine light came on again but the engine was ok. I had a P0300 code, erased it and came back

One evening last week I started my car from work and the engine was misfiring all the way to home.
The only misfiring I had before was on the Highway and it started about 6 month ago. When I wanted to push hard there was misfiring. At normal speed it was running fine. I always use premium gas.

The misfiring is going on and off. Can drive for an hour and everything is ok then it will misfiring and then back to normal. Every morning at startup the car will misfire and will stay like that all the way to work or sometime it will settle by itself.

I have done plugs regapping, changed CPS, added injector cleaner, did an engine flush and put new oil.
Cleaned the MAF sensor. I have also checked for vacuum leak with the carburator cleaner on almost all the lines I could see but I may have forgotten some. The fuel pump was changed about three years ago when my fuel gauge died. Did a compression test, here the result.
Cold: #1:205 #2: 210 #3: 200 #4: 205
Wet: #1: 230 #2: 240 #3: 240 #4: 240
Warm: #1: 200 #2: 210 #3: 195 #4: 205
One thing I noticed, once the engine was off the pressure wasn't holding and started dropping. Is it normal?
What baffle me is it is not all the time. Mostly when the engine is cold but when warm it will be ok and it change a few minutes later and then back to normal.
Thanks!

->Posting last edited on Mon, 9 Apr 2018 20:36:28.

Posts in this Thread:
Alert me when someone posts in this thread:
Members do not see ads below this line. - Help Keep This Site Online - Signup
Post a Followup

No Site Registration is Required to Post - Site Membership is optional (Member Features List), but helps to keep the site online
for all Saabers. If the site helps you, please consider helping the site by becoming a member.

Name: Member Login / Signup - Members see fewer ads. - Latest Member Gallery Photos
E-Mail: (Optional)
Re-Enter E-Mail: (Confidential & Secure - Not revealed to other users!)
Note: Please check your spam folder for BB responses.

Subject:

Posting rules are simple - No for sale/wanted ads may be posted here - use the site classifieds.
You may not cross-post your message to multiple BBs.
Not permitted: political/religious topics and being disrespectful (personal attacks, insults, etc...).
 Site Members do not see any red text, inline ad links, bottom of page anchor ads, box ads, or anti-spam check.

Message: (please no for sale/wanted classifieds - post those in the Saabnet.com Classifieds)
Links are now automatically made active, no need for any special code (or use the Option Link field below) - don't put links in () or end with a '.'
To add inline images to your post, use [img]http://www.domain.com/img.jpg[endimg] (or use the Optional Image Link field below).

Links are now automatically made active, no need for any special code (or use the Option Link field below) - don't put links in () or end with a '.'
To add inline images to your post above, use [img]http://www.domain.com/img.jpg[endimg] (or use the Optional Image Link field below).
Optional Link: (e.g. http://www.saabnet.com/)
Link Title: (Optional)
Optional Photo/Image Link: (e.g. http://www.saabnet.com/img.jpg)
Photo/Image to Upload: (Please be patient while file uploads)



StateOfNine.com
SaabClub.com
Jak Stoll Performance
M Car Covers
Ad Available

The content on this site may not be republished without permission. Copyright © 1988-2024 - The Saab Network - saabnet.com.
For usage guidelines, see the Mission & Privacy Notice.
[Contact | Site Map | Saabnet.com on Facebook | Saabnet.com on Twitter | Shop Amazon via TSN | Site Donations]

Random Saabnet.com Member Gallery Photos (Click Image)
This is a moderated bulletin board - Posting is a privilege, not a right. Unsolicited commercial postings are not allowed (no spam). Please, no For Sale or Wanted postings, SERIOUSLY. Classifieds are to be listed in The Saab Network Classifieds pages. This is a problem solving forum for over 250,000 Saab owners, so expect to see problems discussed here even though our cars are generally very reliable. This is not an anything goes type of forum. Saabnet.com has been a moderated forum since 1988. For usage guidelines, see the Saabnet.com Mission and Purpose Page. Please remember that you are not anonymous. Site Contact | Site Donations | Other Sites by SP - Poverty2Prosperity.org | Run Club Menlo Park | ScreenBot


Site Members do not see red text instructions, bottom of the page anchor ads, or box ads.
Click here to see all the Site Membership Benefits!