Indications of a vacuum leak
10-09-02, 04:10 PM
#3
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...low vacuum reading on your boost guage, hissing from engine bay...
To fix, once you find the leak, plug it. This normally involves replacing the hose that is leaking.
To fix, once you find the leak, plug it. This normally involves replacing the hose that is leaking.
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10-09-02, 09:53 PM
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my idle is rough when i first start it once in a while. its KINDA hard to start here and there.
if im pushing the car hard, and i come to a stop quickly, or just put it in neutral, it will sometimes stall. it dips down close to stall speed when i put the clutch down.
but most of the time it idles alright, smooth, no misfiring or anything.
sometimes i get good power, sometimes i dont, its weird.
mike
if im pushing the car hard, and i come to a stop quickly, or just put it in neutral, it will sometimes stall. it dips down close to stall speed when i put the clutch down.
but most of the time it idles alright, smooth, no misfiring or anything.
sometimes i get good power, sometimes i dont, its weird.
mike
10-10-02, 12:48 AM
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well the power thing I am not really sure. The other problems seem to be kinda normal. Or at least normal to me with my 89T2. When I am crusing and put it in nuetral to brake the tach drops to about 300 rpms then moves up when I stop. My idle is normally about 700 but when it idles strange it is around 400.
What year is your fc?
if it is a S4 you can adjust your TPS otherwise I think it is kinda normal on a S5
What year is your fc?
if it is a S4 you can adjust your TPS otherwise I think it is kinda normal on a S5
10-10-02, 01:46 AM
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OK, for the "idle-drop-to-almost-stall" issue, clean your BAC, and give your TPS a thorough test (and ofcourse correct if necessary) 
As for the leaks, they should be relatively easy to discover. Either CC or starter fluid would do the trick (first will stall the engine if sucked through a leak, second will make the engine rev-up). Try to be thorough and methodical (dont go over and over the same spots).
Another solution is to just take off every plastic and rubber hose and check
For example, my TID was cracked, and no matter how much CC I sprayed, I couldnt find the leak. After I removed the TID for the first time, I immediately spoted the crack (kinda hard to miss it, the crack was like 5cm long )
As for the leaks, they should be relatively easy to discover. Either CC or starter fluid would do the trick (first will stall the engine if sucked through a leak, second will make the engine rev-up). Try to be thorough and methodical (dont go over and over the same spots).
Another solution is to just take off every plastic and rubber hose and check
For example, my TID was cracked, and no matter how much CC I sprayed, I couldnt find the leak. After I removed the TID for the first time, I immediately spoted the crack (kinda hard to miss it, the crack was like 5cm long )
10-10-02, 06:51 AM
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Your vacuum readings at idle are pretty good, assuming your idle is set at 750 rpms. If idle is set higher, it may not be as good.
For the big dip in rpm when you put in neutral or come to a stop:
check your dashpot
It is supposed to make contact at 2,100 rpm and dampen the closing of the throttle plates. This may help you.
Hugues -
For the big dip in rpm when you put in neutral or come to a stop:
check your dashpot
It is supposed to make contact at 2,100 rpm and dampen the closing of the throttle plates. This may help you.
Hugues -
10-10-02, 07:03 AM
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mine feels like its going to stall to when i push in the clutch and let it idle but my tps is at 1ohm, maybe i should try and adjust the dashpot just a little bit tho..hmm
10-10-02, 07:42 AM
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Originally posted by BlackFC_NYC
questions:
any prefered way to clean the BAC?
Dashpot? wheres it at? might the last thing i never heard of=)
questions:
any prefered way to clean the BAC?
Dashpot? wheres it at? might the last thing i never heard of=)
The dashpot is a little "spring", which grabs the throttle cable when you let off the gas and lets it return to its idle position smoothly, in order to prevent any sudden bucking of the car....Its located under the IC, top right corner of the engine as you are looking at it when you open the hood. Its "resting" position can be adjusted via a bolt, and you can experiment a bit, until you find the right spot....Shouldnt have anything to do with this problem though...
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