Quote:
Originally Posted by thstone
Great looking car - that paint is beautiful for a 15 year old car!
What did the mechanic who did the PPI say about this problem? That would be the most trusted information.
I hate to say this, but relying on what the seller told you is .... well, let's just say that the information he provided might be questionable. I say this because if the problem had actually been diagnosed down to one particular "sensor", then he would have told you the exact part number that was needed to remedy the problem. Even more likely is that he would have fixed the problem before selling. Since he didn't provide this info, then he probably had someone look at the car for 2 mins and they said, "Its probably a sensor" and this is what he passed on to you.
For reference, 99 Boxster's have a throttle cable, not E-gas, so there is no TPS (throttle position sensor).
The idle control valve mounts to the side of the throttle body and maintains the idle RPM's. The ECU will adjust the idle RPM to account for the added load on the engine when the a/c is on.
In my experience, there are a number of components that influence idle RPM's and might be the source of the symptoms that you are experiencing (MAF, ICV, TB, air leak, ECU, temp sensor, etc).
My suggestion would be to have a competent mechanic look at the car to find the source of the issue.
Maybe someone else has had this exact problem and can help with a more specific fix based on their experience.
And if you were/are a US Navy Seal, thank you for your service!
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Thanks for the insight! I went against my better judgement and just had a fellow Porsche enthusiast here look at it with me and he agreed that it could be the MAF or throttle body being dirty. The guy was an honest person, sometimes you can just tell these things, and he had a very detailed log of fixes he's done.
The MAF has been changed out twice and it does have a K&N air filter in there. My friend said to keep things simple I'd probably be better off switching to a normal filter to make sure it isn't messing with the MAF and between that and cleaning the throttle body I should have a good start anyway.
Haven't done any work on Porsche's before but I'm going to give it a try next week after finding a writeup on how to clean it out. Any tips/tricks would be appreciated.
I am currently in the Navy, not as a SEAL. I came up with the name a while back just as a play on words. Don't want to be accused of claiming anything I'm not >.<