Saab 9-3 misfire problems

Filed Dec 30, 2020 · Engine · NY

Had to have valve job done due to bad /defective/inferior intake valves, from manufacturer. Had to have all intake valves replaced, with modified/upgraded intake valves. Obtained po300 - random misfire codes, had rough idle, checked engine compression, had 45psig in cylinder number 4. Engine had 72862miles, on it, this should be covered under warranty by saab/gm.

Filed Dec 3, 2020 · Engine, Fuel system · 160,000 miles · NY

My vehicle doesn't start/idle well in the cold due to the air intake manifold bolts slowly becoming loose. **when driving and shifting** the vehicle cannot handle the extra unclean air entering the system and will stall out while going anywheres from 0-60+ MPH, once the engine shuts off all power steering also shuts down. The secondary issue is an acceleration problem because the seals on the air intake valves into the combustion chamber have become faulty resulting in cylinder misfires and a high amount of vibration intermittently while driving, the symptoms come and go with increasing frequency as time goes on. This secondary issue ties into the first issue because of shifting with a standard my vehicle today (12/3/2020) shut off while driving 7 times to and from my job.

Filed Sep 25, 2019 · Engine · 100,000 miles · TX

Rough idle and start on cold starts. This issue is well known in the saab community due to gm putting weak material in factory fuel injector valves. Engine loses compression until car is warm, but may result in stalls or limp mode

Filed Jan 30, 2019 · Brakes, Engine · 160,000 miles · OR

Vehicle stalls while in drive there is internal fuel issue causing engine to misfire and potential damage

Filed Mar 5, 2018 · Engine · 71,000 miles · GA

Misfires when cold, resulting in rough low idle speed and possible stalling after cold start.

Filed Feb 15, 2018 · Engine · MN

Hard starting cold with engine misfire and low compression, vehicle starts and runs normally when hot 2007-11 9-3 b207 & 2011 9-5 a20nft ______________________________________________ this is a re-issue of a previously published document with updated information highlighted inred. Models: 2007-2008 saab 9-3 b207r (this pi does not apply to the b284 engine) update: this condition could also occur on 2009-11 b207 or 2011 9-5 a20nft condition/concern: a technician may comment of hard or no starting when cold. They may also find engine misfires with dtc's p0300, p0301, p0302, p0303 or p0304. The vehicle will start and run normally when hot. Recommendations/instructions: this condition may be caused by a worn intake valve and is typically found on vehicles with 50,000 or more miles. Due to the nature of this issue it can be more frequent in cold climates and could exhibit the condition at a lower mileage; inversely in warmer climates it may occur at a higher mileage. Tac has found intake valve wear of the valve seat face will cause significant compression loss in cold temperatures that will not be readily apparent when hot. To properly diagnose this condition perform a cold (after an overnight stay is best) compression and leak down test. As an example, an engine with a 150-175 psi hot cranking compression reading may only show 75 to 90 psi when cold. Once a technician has determined he has the above described concern he must initiate a technical assistance center (tac) case by email at xxxx or by phone at xxxxx prompt #3. Tac will provide the full information on the parts/repair procedure when the case is set. Parts required: inlet valve 2007 to 2011, biopower 55563529 (8 required)

Filed Oct 13, 2017 · Fuel system · 80,000 miles · OH

I have owned my 2008 saab 9-3 for about a year now and I have had an ongoing rough running issue that seems to be getting worse. When I start my car up in the morning it runs very rough. Ihave gotten it diagnosed and it is misfiring dramatically like 6000 on one cylinder and 1081 on another . I have done some research and had this problem diagnosed, several times, as having bad intake valves. After doing more research on this problem, I have come to find this is a rather common issue with this specific year make and model. This is concerning because I have had this repair quoted at over $2500.00. I am very familiar with manufacturer recalls and have been told by multiple dealerships to submit a complaint in order for this problem to be covered under a manufacturer recall due to faulty parts. There is only 80,000 miles on the car!!!!!!!!!!!

Filed Jul 31, 2017 · Engine, Fuel system · 99,000 miles · NC

Reached 100k miles, and car began running very rough. Engine light came on and diagnosed as bad ignition coil. Paid for tune-up, ignition coil, and and fuel service. Less than a month later, same issue. Car running fine, then suddenly almost stalls and engine light blinks then stays on - car runs very rough at idle and acceleration. Replaced 2 more coils. Less than one month issue, same issue - car running ok, then just almost stalls and runs rough - engine light blinks then stays on - relaced #5 coil. When diagnosing, service tech advised that issue was likely worse, not maintaining compression - likely required valve job. Have already paid several thousands of dollars on ignition coils and other service to dealership for this issue, now facing large bill for valve job.

Filed Jan 4, 2017 · Engine · 130,000 miles · WI

I have owned my 2008 saab 9-3 for about a year now and I have had an ongoing rough running issue that seems to be getting worse. When I start my car up in the morning it runs very rough and recently the check engine light has been turning on and off with cylinder misfire codes. I have done some research and had this problem diagnosed, several times, as having bad intake valves. After doing more research on this problem, I have come to find this is a rather common issue with this specific year make and model. This is concerning because I have had this repair quoted at over $2000.00. I am very familiar with manufacturer recalls and have been told by multiple dealerships to submit a complaint in order for this problem to be covered under a manufacturer recall due to faulty parts.

Filed Jun 13, 2016 · Engine · 84,500 miles · MA

Needs valve job ($3k) due to improperly hardened valves. Very common problem on this car. Rough running when cold. Compression test verifies this condition: very poor when cold, but fine when warm. If left on-fixed, will cause permanent misfiring.