ADM

Can you update your website with the details please

No...thats called being a wanker

This line bothers me. "Drives a motor vehicle, in a public place, in a race between vehicles, a vehicle speed trial, a vehicle pursuit or any competitive trial to test drivers' skills or vehicles" Especially...."Any competitive trial to test drivers skill or vehicles" That could be applied to almost anything that’s performed on the road. It’s so subjective and the police can use this to impound our vehicles on the spot, completely bogus. There is no defence for this legislation.

Hi cowie165 I use NissanDataScan v1.5 which I purchased for $30, not sure about the free/demoware options. Although for only $30 you might aswell purchase the real thing. http://home.curl.aunz.net/tpkolo/DataScan.htm http://www.plmsdevelopments.com/consult_if.shtml

The R32 GTR’s are supposed to idle at 950rpm. If the AAC is working correctly this will be the lowest the factory EPROM will allow it to idle. The work shop manual states that to set idle correctly, the AAC solenoid should be unplugged (or disabled via consult) and the idle speed should be set via the AAC idle adjustment screw to 900rpm. I guess this ensures the AAC solenoid regulates idle at the EPROM determined 950rpm. Of course if there is an issue such as a vacuum leak and the idle is artificially held above 950rpm then the ECU has no control (via the AAC) to regulate the idle. . If you have a consult program you can observe the AAC percentage vary to hold the idle at 950 rpm. Of course this only occurs at idle and only if the TPS idle switch point activates and provides the idle flag to the ECU. Again the consult will show the idle flag activate, followed by the AAC valve working to hold 950 rpm.

In fact with a bit of squeezing with long nose pliers its possible to shut of all possible leaks from the other air chamber feeds. On the front side (does that make sense) you have two feeds to the blow off valves and the carbon canister. On the rear side there is a single vacuum line that feeds the brake booster. In my case blocking all these off made no difference to the idle speed. So my problem is not an air bypass system issue. However, I only replaced the two throttle body gaskets but not the intake manifold gasket as that would have involved removing the associated water cooling components as well. That’s the only other place that I could imagine there may be an air bypass style leak occurring. I have an aftermarket fuel regulator on the car which I no nothing about. In fact I’m not sure what impact that could have on idle speed. Does any one know? Other than that I might flick the air flow meters for a spare set just to see if that makes a difference ( although the consult shows it shouldn’t

I’ve had a very similar problem with a 1100rpm idle. This is really starting to annoy me as I recently pulled the complete intake manifold and throttle bodies off to inspect and fix any suspect components, but on reassembly still have the same high idle. I found the Air Bypass Valve was seized. So I opened it and fixed it where with a 12v input it closed within the factory recommended time. The AAC spring was shagged. I destroyed the plug on the AAC while opening it and had another made. I checked all hoses for cracks and cleaned all components including the throttle bodies. The throttle body gasket did seem to be worn, so I replaced all gaskets. The timing is right, the consult reports that all signals are within factory specs but it still idles at 1100rpm. This is so frustrating. I’ve also tried three different EPROM’s with no change in idle. For those of you wanting to test some of the components on the GTR. At the back and underneath the inlet manifold you will see three hoses. The first is the supply to the AAC valve and the second is the supply to the Air Bypass valve. Disconnecting these and plugging them will effectively remove both the AAC and Air Bypass Valves from the idle equation. Blocking the feeds to the CC is also easily done. From there it becomes more difficult as all the hoses that may be causing the leak into the idle control chamber are all hidden under the intake manifold. I’ve had the whole lot apart and still can’t find what’s causing this. I’ve also tried removing the throttle body rose jointed arms so the individual throttles were completely closed, of course with no improvement. As far as I can see it needs to be a leak in the system somewhere, bypassing air around the throttle bodies, but I certainly can’t find it. Under the intake manifold there are two major feeds that bypass the throttle and are connected to an ‘air bypass chamber’ of sorts. Branching off from this chamber is a myriad of hoses that provide vacuum and idle control functions. Blocking these two major feeds would prove or disprove a vacuum leak, but it involves removing the intake manifold and throttle bodies which is a lot of work to simply test a theory. At this point I’m going to live with it as I’ve had the car in the shed for too long. I hope someone gives this a go at some point to see what happens.

Did you receive my PM aswell?

Did you receive my PM?

PM Sent

PM Sent

Thanks Ben, Yeah it’s an awesome road, one of my favourites. Andrew

This is a very late response I know, but Hi Beno33, yes that was me going for a blap in the hills. It was Lobethal Rd and they weren’t blind corners per se. I’ve been driving that road for almost 20 years and there are many sections where it’s safe to pass as it’s possible to look up the road (its up hill) past the corner to check for traffic. Not the best time to be driving that road anyway, with to many commuters heading back home. However, nice to see another line out there giving it a go... GTR’s running stock boost by the way and my 1.8na 1600 is just as quick on that piece of road…Crazy Datsuns!!!

NGK V-Power 8" R5671A-8 Are a copper 8 heat range and are already gapped to .8mm Its what Tilbrook Auto and Dyno have been using in their boosted Skylines for several years now.

Bradkazz, Any chance you could respond in relation to the acticle above and explain what actually happens in practice.