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Engine Shuddering On Start Up

r34gttt

By r34gttt,
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r34gttt Newbie

r34gttt

Posted
Posted (edited)

Hi guys,

Recently during the mornings when I start up my skyline it seems to shudder a little. The oil pressure remains at 0 for a few seconds and rises as soon as the shuddering stops. When I bought the car it didn't have this problem. Also this only happens when the car is first started, subsequent ignitions don't have this problem. Any ideas as to why this occurs??

Thanks in advance.

EDIT: I forgot to add that the car is completely stock, no mods whatsoever.

Edited by r34gttt
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https://www.sau.com.au/forums/topic/312205-engine-shuddering-on-start-up/
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Cadavre Enthusiast

Cadavre

Posted
Posted

A sparkey can connect it to their diagnostic computer, or if you have a search through the forums I am pretty sure you can use the paper clip method on a 34 to check if there are any codes on the ecu.

If it shudders for that long or less its probably nothing to worry too much about, that being said - my 34 GTT does not shudder at all when starting.

r34gttt Newbie

r34gttt

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  • Author
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A sparkey can connect it to their diagnostic computer, or if you have a search through the forums I am pretty sure you can use the paper clip method on a 34 to check if there are any codes on the ecu.

If it shudders for that long or less its probably nothing to worry too much about, that being said - my 34 GTT does not shudder at all when starting.

It's strange. This morning when I went to start it, it didn't shudder at all. Very odd. Maybe it has something to do with the cold weather. I'll have a mechanic look at the ecu in a couple of weeks when I get it serviced.
Duncan Grand Master

Duncan

Posted
Posted

well the good news is oil pressure relates directly to engine revs. so if revs are 0 or even under 300 would expect the oil light to be on.

need to find out why idle is not stable at 800 or whatever it should be - these cars have a beautiful idle when healthy

quarkgun Proficient

quarkgun

Posted
Posted

This also started happening to me recently, and i also suspected it was due to oil. I changed my oil to a 5-30w (was a 10-40) and it happens less, though it does still happen once in a while. I'm wondering if it isn't the oil pump. My car has only done "61000" kms, but maybe it's time to do the 100k service and change the oil pump. Not sure if you can check the health of the oil pump either... the pressure seems to be fine, but like your experiencing, sometimes on startup it will want to stall and the revs drop right down.

It also sounds silly, but it doesn't seem to happen when i hold the key in the 'start' position a fraction of a second longer than i ordinarily would... does that indicate a tired motor?

r34gttt Newbie

r34gttt

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It also sounds silly, but it doesn't seem to happen when i hold the key in the 'start' position a fraction of a second longer than i ordinarily would... does that indicate a tired motor?
I think we may have the same issue. My motor's barely done 55000ks though so it's very odd.

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