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Discussion Starter #1
Hi so on a 91 16v that has sat I started for 2 years - it starts and isles but when I try to pull away in gear the car bogs down and engine cuts out - I have a check engine light on all the time. Can’t see anything obvious under the hood - checked all hoses etc . Any clues what to check for ? Thanks
 

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Did you pull codes? The 2.1l with LH 2.4.2 has pretty decent diagnostic capability.

Sounds like a vacuum issue, but could be MAF, etc. A mixture problem IMO.
 

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Ok - excuse my ignorance - I trailed through that thread but didn’t really get what device to use or where the input was on my car - some say under the seat some say under the hood - what device do I use to get a code ? Never done this on an old Saab ? Thanks
 

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From the link in that thread:

Step one is to make yourself a switched and fused jumper wire(2.5 amp fuse). Please see diagram. The fuse is important,test sockets have been known to have been wired wrong and or jumpers stuckin the wrong slot. While we're on the subject of burning things up the900 models with 2.2 LH (all 1985-87 and 1988 turbo) have a 3 pin testconnector that looks just the same as the LH 2.4 connector. Please don'tbe tempted to pull codes if you see this socket. Grounding this plug willlet the smoke out of your system relay and possibly your LH computer.

.....Now that you have made your jumper wire you have to locate your test socket.On 88 model 900's you will find it located on the right side of the enginecompartment close to the recirculation door for the ventilation system.For the 1989 and up 900 classic you will find the socket under the backseat in the center on a galvanized bracket. If you have a convertibleyou will find it on earlier models underneath the rubber boot betweenyour center console and the stick shift. If It's a later model it willbe under the back seat just under the right side panel. (See diagram)

1.Ground pin 3 on the 3 pin test socket in engine compartment or pin 2 ontest connector under back seat depending on your model.

2.Turn on the ignition to the run position( the check engine light should beon )

4.Now turn your jumper switch to the "on position" check Engine lightshould go out.

5.Now watch the check Eng. light you will see a short flash. Turn your jumperswitch back to the "off position"

6.This is when you get your flash code the first flash of the check Engine lightshould be a long one the next will be short flashes with a pause in betweennumbers. These short flashes are your code after the code has been shownthere will again be a long flash. These long flashes tell you the codeis starting and ending. After the long flash your ready to pull the nextcode. Turn your jumper switch to the on position and watch for anothershort flash then quickly turn it back off again the second code will nowbe shown in the same manner as the first. The system may store up to 5codes. When all codes have been read you will get a long flash over andover.

7. To clear codes once you have read them turn your jumper switch back on andwait for 3 short flashes then turn the switch to the off position.
 
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