Re: RPM Surge - Answer?! - Saab NG900 & OG9-3 Bulletin Board - Saabnet.com
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Re: RPM Surge - Answer?!
Posted by xhawksaab (more from xhawksaab) on Sun, 7 Sep 2008 19:48:03
In Reply to: RPM Surge, Worldly, Tue, 26 Aug 2008 18:58:23
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After doing some research, (and checking with my SAAB indy), it seems likely to be the throttle body. There is a potentiometer that is part of the throttle-by-wire system and over time it can develop bad spots. This causes the engine management computer to read the engine speed as too low, so it will send a message to the motor to open the throttle. As soon as the pot moves off of the bad spot, the engine jumps in revs causing the computer to back off the throttle and this can cycle for a while. If it gets TOO bad, you will need to replace the throttle body. There are a few other possibilities, but this AFAIK is the most likely.
Posts in this Thread:
- RPM Surge, Worldly, Tue, 26 Aug 2008 18:58:23
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