| [ Total Views: 1154 | Total Replies: 7 | Thread Id: 82100 ] |
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 ahoogah
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 posted on February 21st, 2010 at 12:15 PM |
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OBD1 software diagnosis assistance.
Hi Guys, I have installed an EJ22 into a T3 and after having fuel problems (sludgy fuel tank), the engine is running superbly.
It was said by a VW officianado that I will be disappointed with the conversion compared to the wasser boxer.
Well it doesn't sound like a VW engine nor pull like one, it is smooth, torquey and quiet and pushes the van along fast enough to warrant a careful
eye on the speedo.
The idle revs on an EJ22 cannot be adjusted manualy and as it is idling excessively, I need the assistance of someone with OBD1
software capabilities.
I do intend to get the necessary software etc. but really need a quick fix. Any assistance would be greatly appreciated.
Thanks,Dave.
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Joel
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| posted on February 21st, 2010 at 07:12 PM |
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this is a pretty common problem in all ej series engines
idle speed is adjusted by loosening and rotating the Idle air control valve
99.9% of the time high or low idles are not a software issue
its the IACV is gummed upwith carbon
try cleaning it out first
and then set the idle with it
process is pretty simple
http://www.ozliberty.com/home/suspension-and-handling/idle-air-control-valve-...
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ahoogah
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| posted on February 21st, 2010 at 07:34 PM |
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Thanks Joel,I removed the battery to start another vehicle and on re installing and starting the idle has dropped to an acceptable
level. I am thinking that with the fuel problems I was having, the ECU may have adjusted to suit and when I disconnected the battery the ECU may have
cleared. Appears all good now, but I will clean the valve.
Thanks for the link Joel.
Dave.
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ElusiveStranger
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| posted on February 24th, 2010 at 02:12 AM |
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| Quote: | Originally
posted by Joel
idle speed is adjusted by loosening and rotating the Idle air control valve
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No it isn't. It's done by the ECU, basically treating the ICV as a stepper motor
Edit: Should have added, follow those cleaning instructions but add some "witness marks" onto the IACV body and the actual valve - then you'll be
able to align it back up as to factory settings
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Joel
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| posted on February 24th, 2010 at 06:47 AM |
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damn you got me there bloke 
guess i shoulda added, you can tweak the speed if you have a IACV with slotted mounting holes, most do but some dont
ECU controls how much it opens but the valve itself is set at the factory,
usually they dont need moving, just cleaning
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ElusiveStranger
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| posted on February 24th, 2010 at 11:51 AM |
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Hehe. But seriously, loads of people think you adjust the IACV to alter tickover.
Above all, don't adjust it by using the throttle stop on the Throttle Body
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ahoogah
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| posted on February 25th, 2010 at 07:25 PM |
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Hey guys, I removed and cleaned the IACV as per the link and the problem seems resolved. I still have a slight flat spot on start off but that could
be due to changed inlet dynamics.
Thanks again, Dave.
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ElusiveStranger
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| posted on March 1st, 2010 at 09:15 AM |
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Yay 
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