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Nm35 Surging Idle At Startup

lom

By lom,
in Four Door Family & Wagoneers

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lom Apprentice

lom

Posted
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Hey everyone. In the last few days I acquired a 2003 Stagea NM35 250t RX to keep my '89 Silhouette company ...so i'm a newb to turbo engines and imports ...can't believe how much of a pain the stock Bose system is to repair/replace! ...Anyway, I have noticed rough idle/surging at startup combined with black smoke from exhaust for up to 5 minutes when cold and also after sitting for a few hours ...within 10 minutes the surging subsides ...could it be an oil seal somewhere? It feels like it's going to stall but doesn't. Love my Nissans but in no way a mechanic, though not afraid to give repairs a go. Have already scoured the forums and internet for possible solutions but haven't seen the exact same issue yet ...any ideas anyone? Thanks!!

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scotty nm35 Grand Master

scotty nm35

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Hey Lom, welcome mate.

These are fairly complicated cars to work on, for most maintenance you will need a scanner to diagnose, especially handy with faults like yours. I would start with making sure the revs are correct, it could help with the stalling to clean the throttle, but be aware, don't move the throttle plate when you do.

Have you checked the plugs at all? What mods have been done? Havs the engine light been on at all?

Probably best to get it checked over by someone who is familiar with the M35, there are a few common faults to look over which most have by now. Things like sway bar links, compression rod bushes, passenger side rocker gaskets and others will most likely need replacement if they haven't been done already. Where are you located?

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lom Apprentice

lom

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Hey Scotty, thanks for your welcome and advice! No mods have been done by me, though i think the previous owner had changed the exhaust. No engine lights have been on at all and haven't checked plugs yet though it was serviced a few days before I purchased - haven't had it even for a week ...tbh, compared to the R31, the engine bay is quite overwhelming! The issue only occurs when the engine has cooled. I'm in Melbourne's northern suburbs ...happen to know of anyone who knows their way around the M35? Cheers mate

scotty nm35 Grand Master

scotty nm35

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You are welcome to bring it down here, i'm in Hampton Park.

Is it something you can get fixed under statutory warranty I wonder? I would be pretty pissed buying a car with problems. Was it through a dealer?

lom Apprentice

lom

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Cheers Scotty, i appreciate it mate ...i have a warranty so i'll give the dealer a call ...was hoping it'd be something simple that i'd missed in my extensive searching that i could fix myself ..aside from this issue, drives well as far as i can tell once engine warm ...but you got me worried now haha

lom Apprentice

lom

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Posted (edited)

Just a quick update for those interested, had the local mechanic hook it up to the scanner and no errors/faults were detected ...this may be because the engine was warm so will be leaving it overnight next week so he can start when cold ...thinks it's most likely the throttle body that needs a clean as Scotty has already mentioned

Edited by lom

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