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Sometimes Car Won't Start When Warm

angusis2fast4u

By angusis2fast4u,
in Engines & Forced Induction

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angusis2fast4u Enthusiast

angusis2fast4u

Posted
Posted

So sometimes ill go for a drive, then stop turn the car off, come back 30 mins later and when I go to turn the car on it will turn over easily enough put it won't fire, if I push the accelerator then it comes alive but it will literally not fire unless i press the throttle... and this only happens when it's warm, it's running a Power FC and im starting to think whoever tuned it has no f**king clue.. it seems like they haven't haven't even bothered with a coldstart map or anything, just power runs....for 8 PSI...

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angusis2fast4u Enthusiast

angusis2fast4u

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  • Author
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Take it back to them and get them to fix the tune then? If your not happy and it has a running issue then they should fix it

The tune was done by the previous owner and was done a year or so ago. So wouldn't he have taken it back immediately if he noticed it was sheeeit? coldstart + A/C it just stalls when you take out the clutch, it's miserable to drive in the morning on the way to work haha

Does Nissan have some cold start sensor or relay or something? that could be on it's way out??

angusis2fast4u Enthusiast

angusis2fast4u

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  • Author
Posted

How come in post #1 it's a hot start problem, and in post #4 suddenly it's a cold start problem?

because it has both brah. And a tune would also cause hot start/cold start issues. And so would one of the sensors
hy_rpm Proficient

hy_rpm

Posted
Posted (edited)

Depending if it's overfuelling or under fueling when starting

Might be injectors leaking or cranking enrichment in tune once warm needing touch up but these are only guesses

Need to get the car properly diagnosed

Edited by hy_rpm
angusis2fast4u Enthusiast

angusis2fast4u

Posted
  • Author
Posted

Depending if it's overfuelling or under fueling when starting

Might be injectors leaking or cranking enrichment in tune once warm needing touch up but these are only guesses

Need to get the car properly diagnosed

I Called a shop to book it in to have a major look over this issue as well as retuning it.. only problem is that they are booked out until after WTAC and I wanted these issues sorted before then so I could drive down... :/ It has Deatschwerks injectors which could not be more than 3 years old so while that is a possibility i highly doubt it..

Am I allowed to name the company to see if anybody has had issues/similar issues with this company or is bad-naming not allowed?

angusis2fast4u Enthusiast

angusis2fast4u

Posted
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Posted

Where are you located? Lots of shops in NSW.

Im in brisbane, There are a fair few up here too but I really only trust this one shop with tuning, I might call some other shops though and see what they say

SargeRX8 Grand Master

SargeRX8

Posted
Posted

Do you have a datalogit? If you can get your hands on one. Backup your current tune the reinitalize the ecu. Let it do its cold start setup and then drive the car until its warm and shut it odf and restart it. If issue persists then its hardware at fault.

I had a cold start issue. Car would never start first go. After many people suggesting the water temp sensor, contact cleaner on the afm sensor had the car starting instantly every single time and improved drivability 10 fold.

Dose Pipe Sutututu Grand Master

Dose Pipe Sutututu

Posted
Posted

Try adding more fuel to the cranking table for that particular temperature it's being a little shit to start at.

Also if your injectors are dirty, this would also attribute to starting issues as it's leaner.

Has this developed recently?

angusis2fast4u Enthusiast

angusis2fast4u

Posted
  • Author
Posted

Try adding more fuel to the cranking table for that particular temperature it's being a little shit to start at.

Also if your injectors are dirty, this would also attribute to starting issues as it's leaner.

Has this developed recently?

Yes but I also bought the car recently but for the first month or so I never noticed it so that's why I'm not 100% on it just being the tune

And I don't have access to one man :(

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