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Son has a recon 202 in his torana now with yella terra head ( 9 port )and mid range cam.
The engine only has a 350 holly on it now to get it over the pits before installing the triple carbs he has.
The mechanic had problem getting it to idle and had to just about wind both mixture screws out and then it had to idle at about 900 - 950 RPM.
It's also a bastard to get it to idle when first starting it,even with the choke.
He has had problems lately with the car wanting to stall at lights as the engine starts to stall.
Have just had a good look at it and have been looking at the new PCV valve he installed ( apparently it was the replacement one for an LH Torana )
the existing PCV valve was connected to the air cleaner not the inlet manifold like it is now.
When you remove and block off the PCV valve the engine RPM drops to about 500 rpm and runs fine.When you remove your finger the RPM rises and the PCV valve is still drawing air.I think this is why the carby had to have the idle mixture screws wound right out and I believe the PCV valve is the incorrect one due to the new location into the inlet manifold.
Now after completing my story does anyone else wish to comment.
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Hi Fitzi,
PCV systems are sometimes made inoperative which can have bad consequences.
Those Holden 6's are designed to run with a function PCV.
Not sure what model Torana you have but there are two main systems that would cover most Toranas.
1st type has a vented oil filler cap and a PCV valve drawing air in through the filler cap and via thc PCV valve to the base of the carbie.
The 2nd type has a sealed cap and air is drawn in through a 90 degree elbow attatched to the air cleaner and out via the same route as above.
These two systems must never bee mixed up or engine damage can occur.
Your Torana will be unlikely pass a pit inspection if it has the later system and not connected properly.
If you have the earlier system and the vented cap has been replaced with a sealed cap it will blow your gaskets and not run properly.
Mike
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the difference in rpm with the PCV valve blocked and open is diagnostic to how rich/lean the motor is running. what is the clearance (if any?) between the accelerator pump and the screw adustment? my guess is that you have the accelerator pump activated at idle Edited by user Wednesday, 7 July 2010 1:01:04 PM(UTC)
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Old holdens brought on the spot, quick decision, cash paid. |
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Rank: Member
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quote:
Originally posted by Mike81973
Hi Fitzi,
PCV systems are sometimes made inoperative which can have bad consequences.
Those Holden 6's are designed to run with a function PCV.
Not sure what model Torana you have but there are two main systems that would cover most Toranas.
1st type has a vented oil filler cap and a PCV valve drawing air in through the filler cap and via thc PCV valve to the base of the carbie.
The original engine had the pcv valve connected to the air cleaner with I think a normal cap.
The engine now has a pcv valve connected to the inlet manifold and a breathable cap.You can get partially open pcv valves and closed valves depending on the pressures in the engine.
Think its got the wrong pcv
The 2nd type has a sealed cap and air is drawn in through a 90 degree elbow attatched to the air cleaner and out via the same route as above.
These two systems must never bee mixed up or engine damage can occur.
Your Torana will be unlikely pass a pit inspection if it has the later system and not connected properly.
If you have the earlier system and the vented cap has been replaced with a sealed cap it will blow your gaskets and not run properly.
Mike
Purpul Police
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