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Luke: 1989 4ws auto in Yorkshire

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tt85
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Post by tt85 » Fri Apr 24, 2015 10:11 pm

Wayne2014 wrote:
Vtecmec wrote:What were the revs at when you unplugged the IACV cable? You say the engine was rocking which suggests it may be too low.

On the 4th gen (yours is probably similar) it should be about 500rpm (from memory).

Unplug the IACV, turn off all the electrics, then set the idle by turning the screw to about 500ish rpm then plug it back in.

Cheers Vtec!

That was the plan after looking up on PreludePower - but they suggest 770rpm ...

Hi Wayne, With all the trouble you have gone through to try and get this idle problem fixed, you might as well keep the car once its fixed.... By the way you do know I have a 74k engine, if it doesn't get fixed and you decide to change the engine which will probably be better in the long run, you know where I am! ;)
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Wayne2014
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Re: Luke: 1989 4ws auto in Yorkshire

Post by Wayne2014 » Fri Apr 24, 2015 11:11 pm

tt85 wrote:
Wayne2014 wrote:
Vtecmec wrote:What were the revs at when you unplugged the IACV cable? You say the engine was rocking which suggests it may be too low.

On the 4th gen (yours is probably similar) it should be about 500rpm (from memory).

Unplug the IACV, turn off all the electrics, then set the idle by turning the screw to about 500ish rpm then plug it back in.

Cheers Vtec!

That was the plan after looking up on PreludePower - but they suggest 770rpm ...

Hi Wayne, With all the trouble you have gone through to try and get this idle problem fixed, you might as well keep the car once its fixed.... By the way you do know I have a 74k engine, if it doesn't get fixed and you decide to change the engine which will probably be better in the long run, you know where I am! ;)
Lol
No more garage bud soon, so with Luke park outside 24/7 365 days - it would be difficult to maintain him :(

Ref engine - lol - thanks :lol:
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tt85
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Post by tt85 » Sun Apr 26, 2015 8:04 pm

;)
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Wayne2014
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Re: Luke: 1989 4ws auto in Yorkshire

Post by Wayne2014 » Mon Apr 27, 2015 2:48 pm

Well
Dry today - so opportunity to reset BASE IDLE screw on top of throttle body ...

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Anyway,
Left it in P - it rev up/down between 1000-1500rpm
Pop bonnet
Remove IACV plug - it stopped rev up/down and settled on 1100rpm
Engine vibrated a bit until it settled to a smoother hum...

Turned BASE IDLE screw....
That screw was soooooo lose, had to turn it about TEN times! :shock:

As screw tightened and settle at 600-700rpm, I stopped ...


And...its all good :D :Hello:
Nice just need a good week of testing!
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Wayne2014
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Re: Luke: 1989 4ws auto in Yorkshire

Post by Wayne2014 » Mon Apr 27, 2015 2:52 pm

[youtube]yfMFZSGSbT4[/youtube]
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RattyMcClelland
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Post by RattyMcClelland » Mon Apr 27, 2015 5:10 pm

Wayne2014 wrote: Remove IACV plug - it stopped rev up/down and settled on 1100rpm
Did the revs starts boucing again once the IACV was plugged back in? Thats your issue. The high base idle didnt help either obviously.
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Wayne2014
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Re: Luke: 1989 4ws auto in Yorkshire

Post by Wayne2014 » Mon Apr 27, 2015 5:34 pm

RattyMcClelland wrote:
Wayne2014 wrote: Remove IACV plug - it stopped rev up/down and settled on 1100rpm
Did the revs starts boucing again once the IACV was plugged back in? Thats your issue. The high base idle didnt help either obviously.
Well
I switched off engine 1st.
Then replug IACV and started Luke up, and he was fine.
So much more SMOOTHER and QUIETER now :D
Maybe too quiet??? Eeeek! :shock:


Forgot had to reset ECU (no tools with me to disconnect battery).
So braced myself driving home (as I was fixing it during my school - run).

Drove fine.
Got home - disconnect battery.
Waited.
Reconnected.
Drove again - and it was fine :P

If that fixes it (will give it a week or 2) - then I suspect maybe that screw comes loose (base idle screw) after a while???

Will see....feel MUCH better selling Luke like this (than before having that yo-yo rev)!!!
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Wayne2014
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Re: Luke: 1989 4ws auto in Yorkshire

Post by Wayne2014 » Fri May 01, 2015 7:53 pm

One week on

Drove a few times
Tonight in traffic and on bypass

N is fine
P is fine

:vtec:
:Hello:
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Craig_85
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Post by Craig_85 » Fri May 01, 2015 9:58 pm

Good to hear!
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Wayne2014
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Re: Luke: 1989 4ws auto in Yorkshire

Post by Wayne2014 » Mon May 04, 2015 1:35 pm

Sadly selling now :(

I thank everyone on here for all your help, tips, advice and banter since joining ...


For sale link here:
http://www.ludegeneration.co.uk/prelude ... 15913.html
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