Thread: Idle Problem

Unfortunately, I didn't get to the bottom of the issue due to the language barrier. I think that maybe he tightened the accelerator cable, but presumably that is just holding the engine above the base idle???

Might be better to loosen back off and adjust the idle by the adjuster?

Originally Posted by westonben

Boxer, it does say that adjustment of the TPS is not possible??

However, I've got a spare TPS if you need it. I'm sure we can come to some agreement!

Well... it isn't adjustable, but it can be with a little file or drill bit.

So I did that and it didn't make a lick of difference to the tune. So I put it back to std.

Boxer, now my own problems are sorted I can think about other peoples!

What is your problem? Burning too rich? What have you tried already and what flavour disco have you got?

Ben

Nah, honestly, everything seems fine on mine now. The Boxer touch with some valuable info off this forum and the internerd got it running sweet. It even idles like a charm!

And if by flavor, you mean model? It's a plated 95, sold 96 V8i Manual. Sounds like a V8 Supercar

Something to consider & check.


After playing with this problem for a few years & trying a lot of things, today I fitted a full set of NGK BPR5EY spark plugs.

Somewhere along the line I had fitted NGK BP6ES. This is a colder plug & with no internal resistor. Why, how? I dunno, but I had for some stupid reason. Don't ask 'cos I don't know.

The BPR5EY has a resistor, is a tad hotter & has the all singing all dancing Y shaped electrode tip. The original OEM Champion also was a resistor plug.

********** NGK Frequently Asked Questions ********

Part of my problem has been sooting up & not self-cleaning & with no resistors who can say how that may have played merry hell with the ECU electronics. Consequently, the idle has been haphazard, to say the least.
Tonight, I saw a whole heap of improvement. An idle that can be controlled & the idle responding up when the air cond is switched on. This has always been a bit crap.

Ok, they are clean new plugs, but according to the book of words if they self-clean & reduce ignition "noise" then I may well be in front after all this time.

Was the non - resistor plug playing up with my electrics? I don't know but if you Google "Resistor Spark Plugs" there has been a lot published on this..

I pose this question because it's possible others or previous owners may have inadvertently fitted non - resistor & cooler plugs & may be one of the causes of what seems to be a common problem with the 3.9 V8i & the 14CUX system.

I'm not saying it will fix a particular problem you may be having, but it might just pay to check what plugs you have fitted just in case.

0700 update.

Very cold engine overnight.



Hit key start, rpm immediately jumped to apx. 1500 on the std. onboard tacho.

Within 2 secs had dropped to 1000 rpm.

Sat there at a nice steady idle & the rpm slowly dropped down as the engine warmed.
I would not normally drive this way with a long warmup, but just let it warm a tad & then drive off allowing the Efi controls to take over.

Am I on a winner? Hopefully, as "she" has never idled as well as this from cold in her short teenage life.

I think I've had a good win tune wise too!. I'm just past a third of an 85 litre tank and have just clocked 268km. Normally I'd be just struggling to get to 200 by half tank! And the car is going great. YET!

I'll start a new thread here, but all of this new mileage has been in 4WD... Thanks to a trip to the dyno. If you think you can help, please click here

http://www.aulro.com/afvb/discovery/...tml#post791201

As a reference this is a good read.

Scroll down to Idle Air Valve & you can see why we have problems.


http://www.g33.co.uk/fuel_injection.htm