Results 1 to 5 of 5
-
12 August 2017 #1
- Join Date
- 12 Aug 2017
- Location
- Central Florida
- Posts
- 3
- Saab(s)
- 1987 900 SPG
Car stumbles at constant speed
Hi. My first post for 87 900 SPG. While driving at steady speed, not accelerating or slowing down the car stumbles. In lower gears it kind of feals like when you are first learning to drive a stick and you don't give it enough gas and the car starts bucking. As soon as I give it more gas it stops and takes off. It does this in all gears but doesn't buck in high gears just stumbles. Runs fine at idle. Any ideas on where I should start would be great.
-
12 August 2017 #2
- Join Date
- 28 Oct 2016
- Location
- Minneapolis Minnesota
- Posts
- 1,136
- Saab(s)
- 2006 9-3 2.0t SportCombi
Could be a dirty throttle body but this sounds more like a good old fashion throttle position sensor problem. The car is 30 years old and if it's got the original sensor just replace the sensor and clean the throttle body before you go looking for anything else.
If the sensor is fairly new and cleaning the throttle body didn't get you running smooth call back and I'll talk you through testing the TPS.
-
13 August 2017 #3
Paul A Saab Nut
- Join Date
- 11 Mar 2011
- Location
- West London and Wiltshire, UK
- Posts
- 251
- Saab(s)
- T16 '93 Ruby - T16 '94 Vert Ruby
I wouldn't guess at TPS. Sounds like ignition to to me. I would try new plugs for a start.
-
15 August 2017 #4
- Join Date
- 12 Aug 2017
- Location
- Central Florida
- Posts
- 3
- Saab(s)
- 1987 900 SPG
Thank you for info. I will get a chance to work on it this weekend. Had to work last weekend. I will keep u posted.
-
25 August 2017 #5
- Join Date
- 12 Aug 2017
- Location
- Central Florida
- Posts
- 3
- Saab(s)
- 1987 900 SPG
It was Throttle position sensor. Thank you
Similar Threads
-
Speed shift
By anderssonossredn in forum Saab 9-5 (1998-2009)Replies: 2Last Post: 10 June 2017, 06:36 -
AISIN 6 speed (2.8T) Which oil?
By kurwa311 in forum Saab 9-4X (2011-2012)Replies: 0Last Post: 06 September 2016, 11:46 -
99 9-3 stumbles
By 99yellow9-3 in forum Saab 900 and 9-3 (1994-2003)Replies: 6Last Post: 27 March 2014, 08:07 -
Speed limit
By 9-5NG_SC in forum Saab 9-4X (2011-2012)Replies: 0Last Post: 07 March 2014, 21:34 -
Performance and top speed
By SaabWorld in forum Diagnostics and documentationReplies: 0Last Post: 29 May 2011, 15:55