SaabCentral Forums banner

1 - 5 of 5 Posts

·
Banned
Joined
·
64 Posts
Discussion Starter · #1 ·
Hi everyone
Bought my first Saab four months ago, Its an 87 (front handbrake, and single carb) GL 3 door hatch with 90k on the clock have to confess bought it of Ebay only because it was £180 with nearly a years mot, have struck lucky because she is near mint with cracking Ronal alloys and does at least 50 miles a day on single track country lanes never missing a beat. However she is running too lean have checked previous posts about this and tried the usual timing, but when I set the timing up to 20 btdc she runs well but then runs on badly when I switch of, I have replaced most of the vacuum pipes as part of its just bought the car service which should mean no holes the only thing which I have noticed is a pipe that runs into rocker cover from a wierd looking unit next to the carb when I compress it the revs drop away and I can hear rushing air although I think this is from the unit not the pipe???? please help the fuel consumption is hurting my pocket :confused:
 

·
Saab Mad
Joined
·
14,069 Posts
Welcome to SaabCentral :cool:

My first Saab was a single carb 8v 900, and I still have great affection for them. Still have the car, but tin rot's having its evil way.

The bargain you found on EBay is almost exactly the type of car I am looking for to replace my current 900 in October (MOT time).

Your car is running rich and you'll need to adjust the carburettor needle to get the mixture level. That'll be tricky if it's worn, but new ones aren't expensive. TBH whenever I've needed to get the fuel mixture adjusted on my car I've asked a garage to do it. I just don't have the carburettor knowledge or a gas analyser in order to do the job properly.

Timing should be 20° at 2000RPM. Does your timing lamp have a tacho output on it?

The fuel consumption will hurting the car's engine too, what with bore wash and the run-on (very bad for engine!).

Any pics of this fine vehicle? :cool:

__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote
 

·
Banned
Joined
·
64 Posts
Discussion Starter · #3 ·
Hi Mathew

Thanks for the quick reply,yes I'm worried about the running on and fuel diluting the oil too will reset the timing tomorow and oil and filter change at the weekend, have been using an able assistant to hold it at 2000 using the dashboard tacho, but am going to get a meter to do it properly.Might have to give in and take it to the Saab specialist in Taunton for him to analyse it and take it from there.Would love to post some pictures but the server wont let me because of file size no matter what I do, but she is in stunning condition , and drives a treat I'm definately a Saab convert. I'm saving for a T16 already
 

·
Saab Mad
Joined
·
14,069 Posts
smiley mikey said:
Would love to post some pictures but the server wont let me because of file size no matter what I do
If you're having trouble getting the forum software to accept photos (and can be crap in that regard) then you could email them to me ([email protected]) and I'll host them for you. Just bung over the originals straight from the camera and I'll do the rest.

If you get a T16 before the end of the year and are looking to sell your carb 900, then do get in touch, as I might be interested in buying it!

__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote
 

·
Registered
Joined
·
2,220 Posts
I tangled with the Stromberg CD series carbs many times during the 1970s, when living in New Zealand. The weak point of these carbs is the diaphragm--take the dashpot off (4 screws) and check that the diaphragm has no splits in it. I'd actually replace it, just as preventive maintenance.

As Matthew mentioned, you may end up replacing the needle also--and possibly the main jet. Neither should be expensive--and, again, given the age of the car, I'd replace them both just for peace of mind.

To keep the carb in tune, mixture-wise, I used to rely on Gunson's Colourtune with good results:)
 
1 - 5 of 5 Posts
Top