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engine revs strange 

 

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 Post subject: engine revs strange
Posted: Wed May 09, 2007 9:57 pm 
Getting Side Ways
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my sister just bought a ef the problem is the idle is rough and when you rev it it holds on to the revs the comes down really slowly anyone know what would do that .
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Posted: Wed May 09, 2007 10:06 pm 
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Idle stepper motor:

http://www.fordmods.com/forums/documents.php?doc=23

 

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Posted: Thu May 10, 2007 8:53 pm 
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Yep! On the money! Mine got flung to the s**t house and i don't run it at all!
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Posted: Thu May 10, 2007 9:21 pm 
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jrfttf wrote:
Yep! On the money! Mine got flung to the s**t house and i don't run it at all!


How? When mines disconnected it wont idle by itself
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 Post subject: Re: engine revs strange
Posted: Thu May 10, 2007 10:30 pm 
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mreb wrote:
my sister just bought a ef the problem is the idle is rough and when you rev it it holds on to the revs the comes down really slowly anyone know what would do that .



An EF falcon would do that.
it's pretty much just the way they are.

 

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Posted: Thu May 10, 2007 11:14 pm 
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yup mine does it to, esp noticable when you unplug it (winding the throttle screw in aswell) it wont do it but mornings are a B*TCH...

im running it in its slow down reving state atm, you get used to it..

 

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Posted: Thu May 10, 2007 11:20 pm 
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FordFairmont wrote:
jrfttf wrote:
Yep! On the money! Mine got flung to the s**t house and i don't run it at all!


How? When mines disconnected it wont idle by itself


Get asked this alot! I even had to start my car once with the bonnet up to prove the point to a mechanic!

My car runs a fairly large cam! All i know is that it is big as! I mean to the point when the car idles it tips side to side!

I have plenty of adjustment still in my idle screw! But i have never had to touch it!

As for the technicals on how mine idles without it im not too sure but i been told that the cam is the cause to it all!

I had it plugged up recently and all it did was not wanna drop the revs, so i unplugged it and yeah all has come good!

As for idle cold was a b**ch, but now i have no drama's since the screw has been adjusted to the right amount!
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Posted: Fri May 11, 2007 1:48 pm 
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It would be like that if the trans is in limp home as well.
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Posted: Fri May 11, 2007 2:07 pm 
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its all about emissions... If you dump the throttle then shut it again you get a load of smoke... so the ecu opens it up a bit to keep it cleaner
as a matter of fact it probably saves the bores from petrol washing too and gives you a longer life bottom end
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Posted: Fri May 11, 2007 5:40 pm 
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ok i changed the ICS ,oxy sensor,map sensor,TPS, checked spark plugs lowered the idle speed it was to high and its slightly better and also its got a really rough idle as well would resetting the ECU help ,i cant really think of anything else on these cars.
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Posted: Fri May 11, 2007 5:43 pm 
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Have you got access to someones ecu you can try?

Replace coil pack, check throttle cable movement? Cant be much more to try
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Posted: Fri May 11, 2007 5:47 pm 
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ohh yeh sometimes i can hear the injectors pulse really strangly like they all have a go at the same time then it has a bit of a mental attack straight after then back to normal .
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Posted: Fri May 11, 2007 5:58 pm 
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reset then drive it around for a week to let it re-learn all the changes you have made
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