Will my engine run on standard ecu??


rallypvc said:
There's 2 pipes on the iacv do they both go to vacuum box then or somewhere else? If so where?
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The two pipes as in where the coolant pipes would connect I assume you mean? they aren't for air flow.

Have a look at this thread
http://www.ek9.org/forum/engine/20020-idle-problem-iacv-faulty.html
Scroll down to bottom of my post where it details about cleaning it out. The port which has wire guaze/mesh(left side in pic) is where air enters and the hole to right which has no guaze is where air leaves the IACV.
 
Vtec6000 said:
The two pipes as in where the coolant pipes would connect I assume you mean? they aren't for air flow.

Have a look at this thread
http://www.ek9.org/forum/engine/20020-idle-problem-iacv-faulty.html
Scroll down to bottom of my post where it details about cleaning it out. The port which has wire guaze/mesh(left side in pic) is where air enters and the hole to right which has no guaze is where air leaves the IACV.
Click to expand...

Sorry ment those two holes/pipes lol which goes to vacuum box or is it both?
 
rallypvc said:
Sorry ment those two holes/pipes lol which goes to vacuum box or is it both?
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The right side port as your looking at iacv(one with no wire mesh over port) would need to be connected to vac box
 
Vtec6000 said:
The right side port as your looking at iacv(one with no wire mesh over port) would need to be connected to vac box
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Cheers for that mate I was going have a go at the iacv this weekend before turning the engine over you prob just saved me about 2 hours of f*#+~^g about
Thanks very much! ;)
 
Vtec6000 said:
The right side port as your looking at iacv(one with no wire mesh over port) would need to be connected to vac box
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Sorry one last question what has to happen to the port with the mesh do I just block it off?

Also do I have to pipe the water to it to make it work correctly?
 
rallypvc said:
Cheers for that mate I was going have a go at the iacv this weekend before turning the engine over you prob just saved me about 2 hours of f*#+~^g about
Thanks very much! ;)
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No problem:nice:
 
rallypvc said:
Sorry one last question what has to happen to the port with the mesh do I just block it off?

Also do I have to pipe the water to it to make it work correctly?
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You leave it open, air has to enter through there. Don't need water lines hooked up.
 
Vtec6000 said:
You leave it open, air has to enter through there. Don't need water lines hooked up.
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I've already made a little plate to screw down over the two holes at least now I know I'll need two holes in it I'll just tap the one over the none mesh side and screw in a 4mm hose adapter to it and run it to the vacuum box.

Have I got that all right now then? lol
 
King Aonghus ! :win:

Good thinking, i totally forgot about the IACV.
 
rallypvc said:
I've already made a little plate to screw down over the two holes at least now I know I'll need two holes in it I'll just tap the one over the none mesh side and screw in a 4mm hose adapter to it and run it to the vacuum box.

Have I got that all right now then? lol
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Yep:nice:

Rich777 said:
King Aonghus ! :win:

Good thinking, i totally forgot about the IACV.
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I have my moments:D
 
Cheers again for all help and suggestions from all who replied!

I'll report back about turning the engine over, if I remember I'll take some pics of the vac box set up and the modified iacv as well just in case anyone else try's something similar

Cheers guys ;)
 
rallypvc said:
Cheers again for all help and suggestions from all who replied!

I'll report back about turning the engine over, if I remember I'll take some pics of the vac box set up and the modified iacv as well just in case anyone else try's something similar

Cheers guys ;)
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Oh yes, great idea on the photos! Maybe a small write up too?
 
Interesting wee read this , something that i dont know that much about.

Am with tama i love individual throttle bodies :D
 
Did I not hear that PGM-FI was hacked to provide Alpha-N fuelling?
Someone better than me could tell for sure, but I am pretty sure that the ECU goes into alpha-n limp home mode if the MAP sensor is disconnected.
What will happen at start-up with the MAP sensor disconnected from a vacuum source is that you will be on the wrong part of the fuel and ignition map - quite what the map values are there will be interesting because in the normal order of running you shouldnt be able to pull zero vacuum at idle - so it will be an area of the maps that is usually unvisted.

If you start off over rich the fuel will wet the cylinders and thin the oil if run too long, as there will be no load on the engine nothing significant should happen, and you'd be amazed at how much fuel enrichment there is at cold start time.
If you start off too lean then you may find erratic idle and backfiring through the ITBs.

Once running and off the warm-up enrichments the lambda sensor should start working closed-loop and trim the fuelling as much as it can.

I've started an run cars with massively wrong fuelling - 1000cc injectors on a 1.8 engine with 256duration cams meant we had to change the oil by the time we got it idling because the oil level increased due to fuel making its way past the rings. With standard injectors theres not too much scope for that.
All in all because the engine speed is so low, and as there is almost no load on the engine theres really not much that can go wrong. The engine is more likely to stall than damage itself. Its at high revs and increased loads that you can start to run into problems.

Rob
 
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You may find that a vacuum box causes problems with pressure pulses, which can lead to erratic idling and low speed running.
Also you find that the MAP vales between 50% and 100% throttle lack resolution for clean tuning. I've seen 0% to 50% throttle read 40kpa to 95kpa (11kpa per 10% increase), but 50% to 100% read 95kpa to 102kpa (1.4kpa per 10% increase) meaning that mapping becomes close to impossible.
 
Ermm.... :s you lost me a bit there you obviously know a hell of a lot more about this than me are you a tuner or can you tune?

So your saying I could do away with the map sensor and vac box and run without them?
 
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