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Hunting Then Stalling

ltcree

By ltcree,
in General Maintenance

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ltcree Contributor

ltcree

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Posted (edited)

I have a '93 R33 gtst with a rb25det. Driving it last night it was fine got up this morning to go and clean it and it hunts then stalls. It'll idle fine for about 10-15 seconds then rpm starts to drop away and it stalls, if you blip the throttle when it does this it'll come back to idle fine again for about 10 seconds then do the same thing all over again.

Things i have checked:

Coil packs were replaced with spitfires about 3 months ago and the ignition module was replaced at the same time for a misfire problem.

O2 sensor was replaced about 6 months ago have checked it and is reading fine.

Checked the AFM seems to be reading fine, does lose signal or anything when idle drops.

IAC and AAC valves seem ok, compensating when cold and when loading up with A/C or full lock on P/S - removed and cleaned these anyway just to bew sure, no change. check TPS setting as well.

Checked resistance of coolant temp sensor changes with temp - not sure on resistances but seems ok.

No air leaks that are visable, went over all hoses with spray no change in rpm.

Other than that seems to run fine on the road, no change when its hot or cold. Otherwise I'll talk to Nissan tomorrow and see what they say.

Edited by ltcree
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https://www.sau.com.au/forums/topic/204247-hunting-then-stalling/
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