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Potentially expensive vacuum leak-97 turbo SE Posted by saabdestinyman [Email]  (#1336) [Profile/Gallery]
(more from saabdestinyman) on Wed, 27 Feb 2019 15:56:22
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Hello,
Couldn't find anything about this on forum, so I assume this issue is probably pretty rare.
The car is 97 900 Turbo SE manual 145K. I've run into an issue that is causing a nasty vacuum leak. I recently replaced the AIC motor hoping that it would improve the idle variations and occasional stalls I had been experiencing. I had already checked and replaced several of the vacuum hoses, but it had not changed anything. When installing it, I discovered what I suspect could be causing the entire problem.
At the back of the throttle body, the AIC connects with a large hose (photo link below) and when I loosened the clamp, and started to pull that hose off, the sleeve inside the throttle body to which it was attached came completely out. Hose was still attached (and appeared to have been cemented) and the sleeve offered little resistance, so it was obviously loose before. This has potentially been the cause of my vacuum leak and the problems I was having.
When I first installed the AIC, she ran nicely for a couple of weeks. Then, at start-up, (which was normal) the engine speed began varying up and down through a range of about 1000-2000 RPM with no throttle input. Pressing in on that sleeve joint did nothing, but within a few minutes of running, the engine began calming down, and I decided to drive it to warm it up.
I did not get any surging while driving, and once warm, it initially seemed to be OK. Then it died at a stop, started with some difficulty, ran smoothly, but did not want to idle at all. I made it home by keeping the RPM's up, and it is now sitting in my garage, and I have not tried restarting. Check engine light had come on when it died, but no engine codes showing up. (Autozone OBD)
I'm going to try cleaning up the sleeve, and the hole where it enters the throttle body and using JB Weld epoxy. I don't really expect this to hold permanently, but perhaps long enough to get it to my Indy for a look. Other ideas? I'm figuring it is probably a new throttle body to get this fixed.
, Wed, 27 Feb 2019 15:56:22 <-- Viewing This Message, Thu, 28 Feb 2019 09:30:10
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