 |
 | Home | Contact Us | FAQ | Search & Site Map | Link to Us |
 | Sign In | Join | Other 45 Sites in Network |
Car Forum / Saab Cars / April 200789 900 T sputters at 1/4 tank
Whenever the old '89 900T gets down to about or just below a 1/4 tank on the fuel gauge the thing starts sputtering like it's running out of fuel or something. It does it every time it gets below the 1/4 mark on the tank but runs fine if you keep the gauge higher then that. Any ideas what might be the issue that appears to be related to fuel tank level? TIA > Whenever the old '89 900T gets down to about or just below a 1/4 tank on the > fuel gauge the thing starts sputtering like it's running out of fuel or > something. It does it every time it gets below the 1/4 mark on the tank but > runs fine if you keep the gauge higher then that. Any ideas what might be > the issue that appears to be related to fuel tank level? Are you certain that you are not genuinely running out of fuel? The gauges do not always tell the truth :) Paul 1989 900 Turbo S http://saab.go.dyndns.org/ > > Whenever the old '89 900T gets down to about or just below a 1/4 tank on the > > fuel gauge the thing starts sputtering like it's running out of fuel or [quoted text clipped - 4 lines] > Are you certain that you are not genuinely running out of fuel? The gauges > do not always tell the truth :) Or the rear fuel pump ist kaput. Two good answers were already presented, so I will go for the easy third suggestion: Have you replaced the fuel filter within the last 30K miles? A clogged fuel filter might cause this problem and cause a fuel pump failure, particularly when the car is of this age. You might wonder how I know about failures in older vehicles... Walt Kienzle 1991 9000T >> > Whenever the old '89 900T gets down to about or just below a 1/4 tank >> > on the [quoted text clipped - 10 lines] > > Or the rear fuel pump ist kaput. All 3 sound good. Water build up is another possibility. I'd prob try a couple of tanks with a high octane ethanol blend or plan b add a couple of litres of metho to each of two tankfuls of your normal fuel and run that through. If it's water that should purge it, but you'll almost certainly be needing a new fuel filter afterwards because it'll flush any other gunk and rubbish out of your fuel delivery system too! Cheers >Two good answers were already presented, so I will go for the easy third >suggestion: Have you replaced the fuel filter within the last 30K miles? >A >clogged fuel filter might cause this problem and cause a fuel pump >failure, >particularly when the car is of this age. You might wonder how I know >about >failures in older vehicles... >Walt Kienzle >1991 9000T >"Everett M. Greene" <mojaveg@[EMAIL PROTECTED] >> wrote in message news:20070406.7A598E8.7CE1@[EMAIL PROTECTED] >> Paul Halliday <pjgh@[EMAIL PROTECTED] >> writes: >>> John at john@[EMAIL PROTECTED] wrote >>> > Whenever the old '89 900T gets down to about or just below a 1/4 tank >>> > on the >>> > fuel gauge the thing starts sputtering like it's running out of fuel or >>> > something. It does it every time it gets below the 1/4 mark on the >>> > tank but >>> > runs fine if you keep the gauge higher then that. Any ideas what might [quoted text clipped - 6 lines] >> >> Or the rear fuel pump ist kaput. > All 3 sound good. Water build up is another possibility. I'd prob try a > couple of tanks with a high octane ethanol blend or plan b add a couple of [quoted text clipped - 46 lines] >>> >>> Or the rear fuel pump ist kaput. We have run a few tanks of 'good' fuel along with water treatment and it still does it. I've thought about the fuel pump but what is the magic behind it only happening when it gets to a 1/4 tank? > We have run a few tanks of 'good' fuel along with water treatment and it > still does it. I've thought about the fuel pump but what is the magic > behind it only happening when it gets to a 1/4 tank? If it only does it once the gauge shows 1/4 full or less then either: 1. As posted previously the gauge is inaccurate and it is actually running out of fuel, or 2. There is a problem with the fuel pickup in the tank not getting the last of the fuel properly? Not sure of the pickup configuration on the 900, but on the injected 99 there is a rubber connector between the pump and pickup which can disintegrate with age. If it failed completely it would be impossible for the pump to get the last 1/4 tank or so. As I say, the 900 may be completely different though... Mark > Whenever the old '89 900T gets down to about or just below a 1/4 tank on > the fuel gauge the thing starts sputtering like it's running out of fuel [quoted text clipped - 3 lines] > > TIA my car does same thing. 1985 900s. my gauge doesn't work but when it gets down to about 4-6 gal left in tank it sputters also. I have became accustomed to putting gas in when tripdometer reaches 200 miles. If you fix I would be interested in what worked for you. I tried a can of water remover but it didn't help me. rod >> Whenever the old '89 900T gets down to about or just below a 1/4 tank on >> the fuel gauge the thing starts sputtering like it's running out of fuel [quoted text clipped - 11 lines] > > rod Yes, I've tried the water remover too. When I get a chance I'm going to swap fuel pumps with another 900T in the yard and see if that dows anything. Those fuel pumps are expensive and I don't want to throw the money at it if that isn't the problem. The other 900T runs fine so if I swap pumps that will tell me for sure. I suspect it is the pump, just puzzeled about the magic of the 1/4 tank thing. I'll post back here if the pump swap resolves the issue, especially if it moves the problem to the other vehicle.... |
Reply to this Message |
 Sign In
 Join
 My Latest Posts My Monitored Threads My Blog My Photo Gallery My Profile My Homepage Start New Thread Enable EMail Alerts Rate this Thread
|
©2008 Advenet LLC Privacy Policy - Terms of Use
This website includes both content owned or controlled by Advenet as well as content owned or controlled by third parties.