I have 2003 Saab 9-3 2.0t petrol. Earlier today it developed a problem: on motorway, when I needed to accelerate, I noticed that the engine was hesitating. Just a few km back it was working fine, so the onset of this problem was fairly sudden. Within the next few km it got noticeably worse, where now the acceleration is very poor, and the only way to avoid engine hesitatation is to be really gentle with accelarator. The "check engine" light is now on (it blinks if I press accelerator hard, otherwise is stays on constantly).Questions:1. What could be causing it?2. Is there a way to retrieve engine fault code without diagnostic equipment? I know it was possible with Nissan Xtrail which I had a few years ago.
Country: United KingdomMake: SaabModel: 9-3 2.0TYear: 2003Engine: petrol turbo
Hi, I’m a moderator for this topic and I wonder whether you’re still waiting for an answer. If you are, please let me know and I will do my best to find a Professional to assist you right away. If not, feel free to let me know and I will cancel this question for you. Thank you!
Hi, yes, I'm still waiting for somebody to help me.Thanks!
Thank you for your patience, your business is very important to us, we are waiting on the Professional with the right expertise to come online. Feel free to let us know if you would like us to continue searching for an Professional or if you would like us to close your question. Thank you for your understanding!
Please continue searching
Greetings JACUSTOMER, It sounds like you have an air leak in the intake system and/or the turbo plumbing...This causes unmetered air to enter the engine management system and in turn increase the computers fuel trim...In laymans terms when you accelerate hard it floods out the engine...You need a scan tool to read fault codes...no other way...Also if check engine light is flashing this means damage is being done to the catalyst...You want to avoid this at all costs since it will clog the catalytic converter and you will need to replace this big dollar item...If I can assist further please let me know...jeffrey590
Yesterday afternoon I disconnected the car battery for an hour. After reconnecting it, the "check engine" light is gone for now, but the engine performance has not improved much. The stuttering appears to get more pronounced when the engine is fully warmed up, so that would be consistent with flooding (rather than fuel starvation). On the other hand, on Saturday (before check engine light was reset), when I was manoeuvring inside of an underground garage, I could smell nitrogen oxide, which, as I understand, tends to indicate burn that’s too lean.
Since resetting the computer, I’ve driven about 80 miles (gently, keeping the turbo indicator in the bottom 60% of its range, as engine starts twitching when I get close to the red section) and the check engine light has not come back yet, but I guess it should come back soon?
BTW, I only saw check engine light blinking once, and only for a few seconds when I tried to accelerate hard on Thursday.
So the questions now:
Hello Again, I will answer your concerns in the order you asked them...
I still feel my diagnosis is valid even with your updated info...
The difficulty in fixing it depends on the technician working on it...It seems the leak is a minor leak since the vehicle runs while you "baby" it...A major leak would cause stalling on hard accel...So a loose connection could very well be the fix...or a split hose can be a possibility as well...
A skilled DIYer would be able to find it providing he/she was very methodical at checking and testing all hoses and connections...But a professional would use a Tech2 scanner and monitor fuel trim and various other data to diagnose ...Also a smoke machine hat we use to find minute evap system leaks can make the job of finding a small or hidden leak quite simple and quick...
Finally, disconnecting the battery clears the CEL and the codes as well...so you would need to drive vehicle several trips to gather data and get code to set again...
Any other questions please let me know...jeffrey590
ASE Master Technician , Saab Master Technician w/ 35 years Dealer Experience in Advanced Level Diag.