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Re: I would start with getting the fault code read. Posted by SWEDECAR [Email]  (#112)  [Profile/Gallery]
(more from SWEDECAR) on Mon, 8 Aug 2005 21:30:13
In Reply to: Re: I would start with getting the fault code read., mary, Mon, 8 Aug 2005 19:43:04 Members do not see ads below this line. - Help Keep This Site Online - Signup |
Yeah since you reset the codes by disconnecting the battery they might be gone but it might also be a new code lingering in the back ground that haven't tripped the light yet. But if the Saab shop actually hooked up the Tech 2 and no codes were found, it might take awhile before the code comes back.
With the Tech 2 scanner you can see some values from the fuel injection system, not too many though since it is a pre OBD2 car and a non turbo as well.
I would study the switching speed of the oxygen sensor from when it goes from lean to rich fuel mixture. That would give an indication of how good the sensor is.
As for finding a cheap way to solve your problem, no I don't think there is one.
All this checking this and checking that takes time and a shop will charge for it one or another way. But I just get my hackles up when a shop start mention EGR and PCV system service together with plugs and wires and catalytic converter. That shows they don't know what's really going on but try to get as high estimate as possible to be able to tinker around and hopefully find the problem in the process.
Yes, it might be the cat in the end but a failing O2 sensor will make the cat stop working and therefore it is of uttermost importance that the O2 sensor is checked and declared perfect before a cat is replaced, especially if it is the original Oxygen sensor there with 150K miles. That is at the upper life span of a sensor.
The air valve under left head light must be ok so that the exhaust system doesn't suck fresh air in and upset the fuel system. The back flow valves, I have only replaced a couple of times to solve a high NOx value.
Anders
, Mon, 8 Aug 2005 18:37:00, Mon, 8 Aug 2005 21:30:13 <-- Viewing This Message
, Tue, 9 Aug 2005 09:18:58, Tue, 9 Aug 2005 14:17:21
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