Lee Timmer

The AOS is easy to diagnose based on the amount of oil it would dump into the intake and onto the throttle body if it fails.

The AOS is plastic and 12-13 years old....

Forgive me, but I have autism and sometimes don't understand things clearly. Are you saying that you think it is an AOS issue?

I assume you added the cleaner to an almost full tank of gas. So you already have gas with cleaner in it even beyond the cleaner the gas comes out of the pump with. So I'd wait on adding any other cleaner until you have burned that tank of gas.

And how is your AOS? The throttle body cleaning will tell you about the AOS condition.

The other day, while the car was running, I took the oil cap off. It was easy to remove, but the car sounded like it wanted to die. It didn't, but it was close. AOS issue, maybe?

I assume you added the cleaner to an almost full tank of gas. So you already have gas with cleaner in it even beyond the cleaner the gas comes out of the pump with. So I'd wait on adding any other cleaner until you have burned that tank of gas.

And how is your AOS? The throttle body cleaning will tell you about the AOS condition.

I’m close to using up that first tank. I had the throttle body cleaned and the idle fluctuation seems to be a little better, but it’s still noticeable. As for the AOS, I’m able to remove the oil cap while the engine’s running with no problem (I’ve heard that’s a good thing). I’m still learning. I’ll actually be taking the car to a retired Porsche mechanic in a few weeks for my 60K service. I have a list of other things ready, believe me. Thanks for all the advice.

Lee:

From the symptoms you describe, it sounds like there are either gum deposits or dirt interfering with the proper operation and movement of the idle control valve and of the butterfly valve inside the throttle body.

It would be a good idea to remove and clean your throttle body and to do the same with the idle control valve on your '99.

Here is a detailed DIY on how to do both: http://pedrosgarage....ottle_Body.html

Regards, Maurice.

Thank you. I'm actually planning to take it to my mechanic next week to have him look at the throttle body. I'd do it myself but I'm not mechanically inclined. What about mixing the Swepco with the Red Line? Any thoughts on that? Thank you so much, Maurice.

986 Boxster MY99 55K miles

Hello. I'm having some idle and rough-running issues. As my car is sitting in traffic, the idle fluctuates just a bit between 800-1000 rpm. Not a big deal as far as I know. Might it be a dirty throttle body? I recently had a tuneup completed: new plugs, filters, etc. I also recently added Red Line's fuel system cleaner and since then, my car seems as though it doesn't run as well as before. I've heard others say it's a good idea to change your oil soon after adding cleaner, but my mechanic said that it's unnecessary. I just find it odd that the car runs worse AFTER adding the cleaner.

Finally - and please pardon my ignorance - I also have a bottle of Swepco 503 cleaner. Would it be unnecessary - or even dangerous - to add that as well, considering that I just added the Red Line? I've been trying to educated myself as much as possible about my new toy, but I obviously have a long way to go. Many thanks for any suggestions.

No trip to dealer should be necessary. I replaced the battery in my key fob last year following the intructions in the owners manual. Pry off the cover, R&R the CR2032 battery observing polarity, put cover back on. Good to go.

Thanks for that. I know that may have looked like a stupid question, but I've discovered there's rarely anything easy when dealing with Porsche. Thanks again.

Hello. I recently purchased a '99 Boxster, and I've been doing all the research I can. I have a keyfob that unlocks the doors and the trunk. I keep seeing posts about codes needed. Do I need to go to a Porsche dealership if I just need to replace the battery? The nearest dealership is 200 miles away. Thanks in advance.