Only seems to happen once in a blue moon, notably when it is a colder wetter day.
Noticed lately sometimes that my idle will decide to be about 1200rpm. I could use the car later in the same day and it will be normal at 800rpm. Something is obviously amiss though but where should I start to look?
I'm thinking so far;
check for vac/boost leaks.
TPS voltage.
the idle control valve?
Ok so yesterday I started off by doing a boost leak test. Had to bung the oil dipstick tube as the air came outta there. Anyway I found a big leak on the hose that clamps onto the hardpipe behind the drivers headlight - sorted that out.
However I have air escaping from the spot in the pic. Middle of the plenum towards the front, where the ribs bend down into the centre. Took the thottle cable cover off to see but I cant tell where it's coming from in there. Certainly cant see any piping. What can it be?
95 TT jspec auto.
Only seems to happen once in a blue moon, notably when it is a colder wetter day.
Noticed lately sometimes that my idle will decide to be about 1200rpm. I could use the car later in the same day and it will be normal at 800rpm. Something is obviously amiss though but where should I start to look?
I'm thinking so far;
check for vac/boost leaks.
TPS voltage.
the idle control valve?
Ok so yesterday I started off by doing a boost leak test. Had to bung the oil dipstick tube as the air came outta there. Anyway I found a big leak on the hose that clamps onto the hardpipe behind the drivers headlight - sorted that out.
However I have air escaping from the spot in the pic. Middle of the plenum towards the front, where the ribs bend down into the centre. Took the thottle cable cover off to see but I cant tell where it's coming from in there. Certainly cant see any piping. What can it be?
Would be good to get some better opinion :)
jay
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Edited by dublove