R32 Gtst Hesitates When Cold

[buggor34]

Hey guys,

My brother also owns an R32 gtst & when his engine is cold (left overnight) it hesitates on acceleration. If you keep the same peddle pressure it will hold back for a second then eratically rev harder as normal. Is this a normal thing? or maybe an issue? Having said that it operates fine once the car is at normal operating temp.

Thanks guys

[Rekin]

mmm i think its a common problem for r32's. I remember reading a thread about it.

Just let the car warm up whilst driving slowly and it should be fine

[Al]

It does obviously have a problem as it is not normal behaviour.

If he has an aftermarket ecu, it could just need a tune.

[Rekin]

http://www.skylinesaustralia.com/forums/in...hesitating+cold

the problem is in the ECU.

it is nissans way of warming up the engine with minimal stress on the engine. it goes into rich and retarded mapping up until something like 3300rpm or until you put your foot down a bit more.

do it next time you drive it cold, keep your foot at the same level and get to around 3300 and you will notice a sudden rush as the fuel and ignition maps have gone back to normal.

it is completely normal

[Al]

That doesn't sound right. The manual advises to drive easily when cold, till temps are normal, so why would they make the engine run shit at low rpm, doesn't make sense.

When warming up all tunes run rich with retarded timing, but apart from a lack of power, this should not effect drivability.

[buggor34]

thanks guys, looks as though its normal. Ill tell him to warm up the car before he goes driving it. Thanks

[Rekin]

That doesn't sound right. The manual advises to drive easily when cold, till temps are normal, so why would they make the engine run shit at low rpm, doesn't make sense.

When warming up all tunes run rich with retarded timing, but apart from a lack of power, this should not effect drivability.

The above is just a quote from the link i provided.

I am not sure whether this is normal or not, although most r32's seem to have this problem. Would like to know the answer to this problem

[Memph]

mine does that too.

i dont mind. its like a reminded not to go too fast when its cold

after about 1 or 2 minutes of driving. its completely fine.

[WazR32GTSt]

its a common issue

i personally think its got something to do with the oxygen sensor needing to be warm/hot to operate

it seems like when its off boost it has no power at all, but when it comes into any boost at all it jumps into life like it normally would

[RCEBNR]

mine does it too... doesnt matter if i let it warm up either then drive, always has this 'flat spot' like stepping on a rotten tomato for the first min or 2. jsut normal driving too not thrashing

[nisskid]

so does a very strong smell of fuel in the cabin sound about right, i have a straight through exhaust which may or may not have a cat?

the smell wears off once its warm and has been running for a while.

[skylinegtts]

ive got this problem aswell

[nisskid]

bump, would love to know this.

[Rekin]

I dont smell any fuel in morning start ups..

[Simon-S14]

neither do i.

check your fuel lines nisskid and make sure they arnt perished through and leaking

[Ruffels]

mine did this.... turned out my TPS was unplugged LOL... plugged her back in and good as gold doesnt do it anymore!

[nisskid]

neither do i.

check your fuel lines nisskid and make sure they arnt perished through and leaking

yeh i figured it would probably be a leak in the line, weird thing is, it only smells when its cold and running, so unless for some reason the leaks would close up when its warm, doesnt really make sense.

do u 2 have straight through exhuasts, cats?

[Rekin]

Only have catback exhaust.

Uploaded a video of my daily cold start. Anyone have similar?

As you can see/hear, the key is turned for a while, then it jumps to life and falls back to zero. a blip on the throttle brings it back to life and idles normally...

Cheers

[Andyn]

Rekin that is exactly what mine does each morning. If i get it some revs it starts fine. Otherwise it has issues starting.

[nisskid]

yeh mine does the same, it would seem most do this, im just more interested in the fuel smell part, anyone here have a straight through? Renkin urs sounds pretty quite so i would assume uve got a decent exhaust on urs.