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Engine Specific Info and Questions => IDI Engine => Topic started by: ilikevwdiesel on July 31, 2008, 08:52:00 pm
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I am going to install a 91 1.6 NA motor in my 82 Caddy. The IP has some kind of solenoid on the lower front. It has a small steel tube running up to the top of the pump. What does this thing do? Do I have to power it or can I just leave it? I have no clue what it's for. Anyone?
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That's likely a timing solenoid that's part of an emission control system... safe to leave it disconnected.
It also makes it sound like an 1.9 pump from an AAZ ??? Sure it came from a 1.6 ??
Could well be... lots of variations out there... I just never heard of a 1.6 pump with the timing solenoid.
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there was a 1.6 (eco) with the alt, compensator.They also have the "ksb "(timing solenoid)
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Well there ya go.... ;-)
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there was a 1.6 (eco) with the alt, compensator.They also have the "ksb "(timing solenoid)
Ya but what does it do?
Looks like when it's energized it blocks that port.
What's the point.?
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there was a 1.6 (eco) with the alt, compensator.They also have the "ksb "(timing solenoid)
Ya but what does it do?
Looks like when it's energized it blocks that port.
What's the point.?
It alters the timing slightly... IIRC: couple of degrees maybe... and was triggered during deceleration to (slightly) reduce emissions. Many gassers use a similar technique on the distributor.
Very subtle effect, more than compensated for by running the slightly advanced timing we all run, so safe to leave connected or disconnected... to me disconnected is simpler. ;-)
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My pump is an alt converted pump so I have this on mine.
I thought I had read somewhere to run 12v keyed to it for more advance but is this the case?
Doesn't the little bypass tube allow pump pressure to go to the wrong side of the pump? As in wouldn't that stop the piston from advancing?
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My pump is an alt converted pump so I have this on mine.
I thought I had read somewhere to run 12v keyed to it for more advance but is this the case?
Doesn't the little bypass tube allow pump pressure to go to the wrong side of the pump? As in wouldn't that stop the piston from advancing?
Yup... I think it has power normally and then the power is removed to retard the timing a bit. On the other hand, I've heard that the solenoid itself is the reverse of the stop solenoid... closed with power and open without.
Dunno for sure... but I'm pretty sure its effect is subtle. Advanced and retarded are relative terms, and so I just leave it unpowered and advance the static timing a bit instead... one less solenoid to jam/leak/burst into flames ??!! ;-)
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You want it powered.
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You want it powered.
Thats what I thought, and it is.
I think I can just put a regular cover on it though and plug the hole in the top then i wont have to deal with it..
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You want it powered.
why?
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I believe the reason for charging it is when it blocks that port it stops the internal pump pressure from going to the wrong side of the advance piston so it would be harder for the piston to move to the advance position, when blocked the piston can more more freely to the advance position earlier.
I hope that makes sense..