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vintage 1997 Boxster....
Shortly after I changed the oil, the revolutions at idle began to oscillate between 300 rpm to about 1200 rpm. Reading various forums identified the most common problem is a dirty throttle body, possibly the Oil Air Separator (OAS). Given the car has 34K miles and cleaning the TB has never been done, I figured it was time. The throttle body was indeed filthy with a very light oil-like coating, and same for the plenum to the cylinders. Having seen pictures of the effects of a bad oil separator, I figured mine was ok and what I observed was just buildup of 34K miles.
After a through cleaning I reassembled the TB and remounted it (what a PITA that was because each side of the 'T' plenum would not line up with their respective intake manifold). What a struggle.
Finally got it beat into submission and connected the vacuum lines and this is where I need some help. Standing behind the engine, on the extreme RHS there is a vacuum line with what looks like a check valve that goes into the RHS plenum. Got that inserted although is seems rather loose.
Now, on the LHS at the rear, when I had removed the TB, I noticed a very small (less the 1/8" OD), thin black hose about 6" long that was adjacent to the hydraulic fluid reservoir - I don't recall if I pulled this out of the 'T' plenum or where is should be plugged.
Can anyone offer any suggestions? Perhaps a drawing showing the vacuum lines attached the the TB plenum?
The car seems to run OK after the cleaning and I do not notice any strange behavior.
Insight much appreciated.
I'm new to Renntech and hopefully I follow the decorum correctly. If not I apologize. Anyway, I have a 2000 Boxster S. It has been sputtering on take off and gave codes that suggested the MAF was out. I disconnected the MAF wiring and it greatly improved the performance. I ordered a MAF and by the time it came in I believe my car went into Limp Mode. I installed the new MAF and cleaned the throttle body but it still acts like it is in limp mode. I also changed the spark plugs hoping this would help. The only code I'm getting off it now is P1118 and also the codes for missing on cylinders 2 and 3. Is it possible that is simply still in limp mode? If so is there a way for me to reset it?
So I was watching a YouTube video on how to clean my throttle body. It was very thorough except for one thing. It never mentioned anything about the two small tubes that insert into the gasket that connects the plenum to the intake manifolds. I've searched and can find no info on what these tubes are. I snapped one and am not looking forward to trying to run a new one. If I could just leave it off that would be best.
Today I tackled my first DIY service on a 2006 c2.
After the service the engine check light turned on, any help would be great!!! Here is exactly what I did:
- I wanted to check the spark plugs so removed 2 coils and 2 sp, I put them back on as they were clean. I plugged the coils back on, screwed them back on.
- changed oil and filter.
- change air filter, cleaned the Maf carefully with Maf cleaner without touching any component
- cleaned the inside of the throttle body as it was somewhat dirty. Dried it completely before putting it back on and changed the seal. Note that when I cleaned it I moved the internal part to clean thoroughly.
- topped off coolant
Thank you for your thoughts and tips!!!
Hello, I'm looking for a Diagram or Info on routing the throttle cable?
Recently had the engine out and upon reinstalling I'm finding the tab where the rear cable section (to engine) connects to the front cable section (to cockpit) doesn't have quite enough slack. If I reassemble correctly it keeps the throttle plate cracked open resulting in a 3000 RPM Idle! LOL
I have the Porsche factory PDFs that are floating around but have yet to see the cable routing & adjusting info. Currently I have the cable routed up over the manifolds and down the back next to the trans. Technically its laying on top of both resonance pipes and then drops down the back.
Thanks in advance if you can help.