Date: Tue, 14 Oct 2003 15:24:33 GMT
From: "David Spear" <dspear99canopsamo.com>
Subject: 900 turbo intermettent no-start condition


Recently my '82 900 turbo has been acting up. Twice in the past 3 weeks it will not start. It will turn over until the battery is drained (as my wife discovered). I am able to loosen one of the fuel lines on the fuel distributor, run the fuel pump for a few seconds to bleed out the pressure from the system, tighten up the line and she starts right up. The pressure accumulator is definitely working; when I loosen the banjo fitting coming out of the fuel filter fuel sprays out quite a bit. Maybe too much... I am getting spark, so I assume that this MUST be a fuel delivery problem. Oh yes, the car was almost cold (had been running for only 1-3 minutes) the first time it happened. The other time the car had been shut off for approximately 2 hours. So we are not talking hot start problem. As I said the problem is intermittent, most of the time the car is fine. I have recently tuned it up replacing air, oil, and fuel filters, changed oil, changed spark plugs, leads, distributor cap & rotor. Also set lambda pulse ratio & timing. Could not replace O2 sensor, it is seized badly, but that's another story. Some thoughts I have had: a) insufficient or excess pressure generated by fuel pump or pressure accumulator... I wouldn't think this type of problem would be intermittent but I am often mistaken. I am reluctant to buy the test guage/fittings/etc. as it is about $65 and I will in all likelihood never use it again, but it's cheaper than taking it to a shop for 1 hour. BTW, does anybody know if an '82 900 turbo has a pressurized fuel tank? My manual seems to say "some do, some don't" but doesn't give VIN ranges. b) turbo overpressure cut-out switch - anybody ever heard of intermittent problems with this? And is it located inside the car or in the engine compartment? My manual is unclear. Also as I had my two small children in the car last weekend when this happened I didn't really have time to climb into the trunk to ascertain whether or not the fuel pump was running while the car turned over. I DO hear the 1-2 second pumping when the ignition is first switched on. Would a tripped turbo safety switch keep this pre-ignition pumping from happening or is it on some separate circuit? Any opinions greatly appreciated. Dave

Return to Main Index

The content on this site may not be republished without permission. Copyright © 1988-2019 - The Saab Network - saabnet.com.
For usage guidelines, see the Saabnet.com Mission and Purpose Page.
[Contact | Site Map | Saabnet.com on Facebook | Saabnet.com on Twitter | Shop Amazon via TSN | Site Donations]