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Discussion Starter #1
Hi all we have been having problems with our GTST for a while now. It will just cut out at random, any speed any rev hot or cold (but mostly hot). The problem started when i got a straight through exhaust put on (de-cat), but also the day before that i degreased the engine and we found water in the coil packs. We have took the car to a garage who specialises in skylines (they fitted the exhaust). And they have checked the following:
coil packs + amp
plugs
airflow meter
Items changed:
lambre sensor
fuel pump + filter
air control valve
Please can anybody help before she sells the car she has not blown her lid just yet but I think we are due a full moon soon.
 

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Did this 'Skyline Specialist' not give you an idea???
 

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Discussion Starter #5
Yes, we are thinking along those lines! I am going to take the car back to the specialist and he will loan me an ECU to try for a week. I did a self diagnostic test, which gave me a clear result on all items tested. I think it's going to be a case of eliminating one component after another, if the ECU trial doesn't give the answer.
 

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bla
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who are these skyline specialists, if they where that special theyd know straight away.....
 

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Discussion Starter #9
Skyline "Cutting Out" problem.

Hello all you Nissan Skyline Enthusiasts! I'm "Looby's" father in law!! We have just removed the "coil packs" and spark plugs. Given the coil packs a good clean with fine grade emery (wrapped around a fine round file) and then a few turns with steel wool. Got them nice and shiny! Checked condition and gaps on plugs. (Plugs are "iridium" type). Plug gaps were 0.8mm, and in good clean condition. Looked a kind of straw colour. No cracks in insulation. Tips were not worn. Made visual check of wiring harness to coil packs. Looks OK.
Put everything back together and started engine. Started fine, tick over at about 850 to 900 rpm. Idle smooth, no lumpyness, misses or hesitation. Left car engine ticking over for several minutes whilst we tidied up tools and cleaned ourselves up!. Car's engine suddenly cut out without warning (just as it has been doing) as if someone switched the ignition off. We checked if any lights or indications of something wrong were showing on the instrument panel. Only the usual lights were showing. It's totally baffling. (I'm from the era of Austin A40's and Ford Anglias, so I can't offer much more than the basic checks on engines. The Nissan Sykyline engine looks a truly formiddable monster!! There is a black rectangular component bolted to the top of the spark plug cover. It's quite thin, and about 3inches x 1.5 inches. It looks to have a plug of wires coming in on one side, and a set of wires feeding each of the Coil packs coming out of the other side. I thought it might be a "ballast resister" of some kind (like the old cylindrical capacitors that used to be fixed to the side of the old distributors). Does anyone know what this component is, and could it be failing and the cause of my son-in -laws Skyline engine cutting out problems?

Thanks to the gentleman in Scotland, who has offered the loan of an ECU. I will get my son in law to reply to you.

Regards,

Phil Edwards ("Looby's" father in law.
 

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bla
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So you have a 1995+ gtst... I think what your reffering to is the coilpack amplifier...
 

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might be worth trying an acv of the side of th plenum, i put my spare one on mine the other day while i cleaned my old one and the wife took the car shopping and rang me to say it kept stopping for no reason, put my old one back on and it fine now,i noticed you have checked yours but there is a screw on the side to alter tick over,
 

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Discussion Starter #12
We have changed the acc for a second hand one, then it was running a bit rough so I cleaned it out and it runs better now. I need need to check the idle it is currently set to about 900rpm, I think it should be lower than this.
When the throttle is released quickly it hunts for idle but if I ease off the throttle it's fine. Sorry forgot to mention my car is a 1994 'l reg' GTST.
 

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Always sideways
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The coilpack amplifier is a Spec 1 engine feature Shane, not a Spec 2. It features on any car with a Spec 1 engine so I doubt it appears on many engines 1995+ (maybe just a typo :))

But you are correct, what Phil is describing is the coil pack amplifier. I'm no expert but if the engine starts and ticks over ok for some time before shutting down I don't see how the coilpacks/amplifier could be the cause.
 
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