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skybox 32

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Posts posted by skybox 32

    Idle Issues

    in General Maintenance

    Posted

    Its probably an air leak somewhere in the engine bay or in the exhaust. Have you had a new exhaust installed? Aparently there's mechanic automative type stethacope that you can buy at any automotive shop that can help with detecting air leaks...Hope that helps...

    thanks for all the responses.. im goin to get a mate to do a ecu diag so as to track down the culprit.. atm it could be a range of things. so ill keep you guys posted when i get the results

    Idle Issues

    in General Maintenance

    Posted

    I have the same problem on my car and it's the IACV valve (cold idle valve)

    that needs cleaning because it's sticking.

    A way to avoid the stall is applying a little bit of throttle when starting

    the engine or crank the engine for a longer period.

    I noticed IACV valve replaces the choke on the dash of older 80's style Nissan's

    and is known as a automatic choke, that I think is controlled by ECU.

    The valve inside the IACV valve can stick due to being dirty or can't be repaired

    thus needs to be replaced.

    The IACV valve on the RB20DET is located on the bottom half of intake plenum,

    just behind the throttlebody. If you follow the rubber hose from AAC valve to

    J pipe that goes over the top of motor, you'll find a T section and the single

    hose from that T section leads to IACV valve.

    What you need to do is remove the IACV valve and spray down where the single

    hose connects to IACV valve and remove / clean out the built up dirt. Then check

    the movement of the valve inside the IACV valve with a flat head screw driver. If

    still sticky, then replace the IACV valve.

    Before refitting IACV valve, adjust the screw on IACV valve so the valve is fully

    open. Can't remember which direction it was.

    Basically how it works is IACV valve is fully open when engine is cold and

    slowly closes when the engine warms up. Once the engine is warm, ACC valve

    takes over to supply air to intake plenum. I think IACV valve adds extra air to

    intake plenum which combats the rich mixture in the cylinders when engine

    is warming up.

    Sometimes one or both of these valves can cause problems and need replacing.

    Other area's to look at with similar symptoms can be air leaks in intake piping,

    faulty or misadjust TPS and o2 sensor failure.

    I hope the above helps. :P

    THanks for your insight skyper.. me an a mate ( mechanic) last night blocked off the IACV valve and the related hose to see if that would help when we cranked it over. Still was hunting bad upon start up, so we changed it back. He mentioned that Ill try clean out the valve and let you know...

    Also found when driving home from work today that it is starting to run a little lean. There was a burble on idle and when i drove the burble would go away. Now it seems after accelerating a little and taking my foot off the accelerator i can hear the burble.. Could this be another issue? or related? Maybe an air leak somewhere?

    And yes, i have the right plugs in :(

    Idle Issues

    in General Maintenance

    Posted

    Have you adjusted the TPS correctly. If it is "off", it won't send a "throttle closed" signal to the ECU, and the engine will idle fast.

    Have you adjusted the AAC correctly?

    Have you had the injectors cleaned?

    Don't understand about the diagnostics test. Nissan are the ones who will have the diagnostics tool - you don't need one. I might be able to recommend someone, but they might not be in the same area as you.

    Hi!

    Thanks for the swift reply.

    As far as the diagnostics tool goes, what i meant was that I didnt have a diagnostics tool but didnt want to go to Nissan who would prob charge an arm and a leg to do a diagnosis. Id rather try eliminate every possibility before chekin diagnostics.. ;-)

    As for the TPS and AAC I have only adjusted roughly by idle level as I dont have access to a R32 Manual. I purchased the r32 Specs on CD off ebay so that should be coming soon. Is there a more accurate way of adjusting the TPS and AAC?

    I am living in the Ringwood area by the way.

    Cheers

    Idle Issues

    in General Maintenance

    Posted

    Hi guys!

    I have a crappy idle issue with my r32 gts-t and have done a bit of investigating on the forums.

    1. I have cleaned and replaced the acc controller.

    2. I have eliminated the possibility of TPS. (Changed that over)

    3. Changed the Crank Angle

    I still cant seem to work out why the idle is so rough on start up... and rises when engine is warm to around 1100 rpm when decelerating at the lights

    I havent changed the plugs yet i will do that shortly.

    Is there anything else that could be making this idle hunt / want to stall so much?

    I have moved the TPS a little higher to compensate the low idle and adjusted the aac.

    I know that there is an issue with skylines regarding this as i have read the forums.. Just wondering if there is any other suggestions.

    Does anyone know a decent / cheap electronics place to get the diagnostics checked out. im a bit hesitant of going to Nissan just yet as i dont have a diagnostics tool.

    Gauges

    in General Maintenance

    Posted

    Hi guys,

    I dont have any aftermarket gauges on my gtst r32 yet and was just wondering what everyone has?

    oil pressure, boost and water are obviously the main ones i need. just wondereing what brands people have :)

    Rear Brake Light

    in General Maintenance

    Posted

    Just wondering if the R32 gtst comes stock with the rear brake light inside the car. I have one on mine, but it keeps falling down. Ive tried everything to stick it up there from outdoor double sided tape, to some silicon crap. Any recommendations?

    Cheers :(

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