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YOUR RESEARCHDid some stuff today...
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Check coolant tank
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Performed · outcome unconfirmed · Original poster
I also for the hell of it checked the coolant tank.
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Performed · outcome unconfirmed · Original poster
My car has been idling poorly lately, so I cleaned the following the carb cleaner:
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Performed · outcome unconfirmed · Original poster
Next I cleaned the MAF with the special electrical cleaner.
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I also inspected the BMC filter and it was a little dirty but not bad.
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This feeling was the same when I changed the stock exhaust to B&B headers-
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My car has been idling poorly lately, so I cleaned the following the carb cleaner:
ICV, throttle body/blade inside and behind, holes for ICV on TB. It didn't seem that dirty but did leave black carbon onto the rag.
Next I cleaned the MAF with the special electrical cleaner.
I also inspected the BMC filter and it was a little dirty but not bad. I had a new stock one so I tossed it in there just for the hell of it to see if the BMC made a difference or whatever.
I previously taped up the holes on the bottom of the airbox to give the intake cooler air and not hot air from the engine. I believe this was a bad idea after all was said and done - the test drive-
I also for the hell of it checked the coolant tank. It was actually a little low and I happened to have 1qt. of the Porsche coolant so I tossed it in there.
I really wonder why the antifreze level was low?
I replaced the coolant tank about a year ago and didn't really bleed the system that much just a 100 mile drive with the flap up.
The other concern was that I had to have my heads time certed when the bolts broke off. - A possible inference is that there is a crack or leak in the head from which resulting in the coolant loss, but the car has been running fine otherwise so I cannot say.
The start:
The car took a while to catch while starting because of the residual carb cleaner in the intake- no big deal.
It was wierd only hearing the exhaust instead of also hearing the loud sucking the bmc makes -ssssssss (after the air pump turned off)
The car NOW idles great.
Before it would go
idle, idle, idle, dip, idle
now it is constant with no dip, and more notably the idle is infinitely smoother now.
I cannot say that the smoother idles isn't a combination of all of the factors but the result is great.
I changed the bmc out to the stock to see if the bmc made a noticeable difference or not.
My impressions upon driving
I let the car warm up and then I jumped on the freeway and immediately noticed how much SMOOTHER the car ran throughout the RPM
It was a lot more linear and pulled great to redline.
IT also seemed to rev to readline significantly faster if you can believe that!
I ran it through the gears and I was pretty impressed to say the least.
What I really found is that, while the BMC maybe gives a couple of ponies and maybe because I untaped the holes in the airbox it now sucks more air- the end result is that the car has significantly more torque now!
I don't know if the ecu like the stock filter better or holes or anything else I did but the car has not only more torque across the board but it has more LOWER
This feeling was the same when I changed the stock exhaust to B&B headers-
The car pulled significantly better through the rpm and had more torque lower
A huge notable imporvement again back to the idle:
The car is MUCH easier to drive not only from a start but THROUGH the gearchanges because it's smoother.
The VERY intersting thing with the idle is that before when I say put in the clutch from driving to stop at a light, the rpm would always do a weird pause before returning to the static idle
Likely this was the not so great hand-off to the ICV.
Now it drops right on down without pause!
It makes it soooo much sooother it's rediculous.
Needless to say I am stoked! The car has more torque all around, is smoother all around, idles better, is easier to drive both upshifts and downshift rev mathcing is better, and the handoff to the icv at a light is unnoticable!!!
wooo hooo!
SPR,
I have the same idling irregularities. For the slow ones amongst us, could you explain what ICV, TB ,BMC are? I know what MAF is, but what was the electrical cleaner you used?
Thanks,
Jason
Thanks all. ICV is the idle control valve it is on the left side of the throttle body. The contact cleaner that I used which IS plastic friendly - the Necessary criteria, is called puretronices contact cleaner. I picked it up at fry's for 3.49. Just look for something simular that is plastic friendly and doesn't leave a film. BTW I could not have done any of it without the help from 1999Porsche911 Thanks! Sean
When you cleaned the MAF, did you spray the entire unit, or only the part that goes into the hose?
I would like to clean my ICV as well, do you have any pics of the ICV, I want to make sure that I understand what part this is.
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