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Car Won't Start When Its Hot!

Country Cruzin

By Country Cruzin,
in Engines & Forced Induction

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Johnny Veteran

Johnny

Posted
Posted

Yeah mate same boat here, i have a power fc though and i think its something do do with fuel/ignition timing vs intake temps on startup?

never sure but last 2 days its been hot and my car has taken a couple of attempts to start.....same in very cold-start conditions.

The Dan Grand Master

The Dan

Posted
Posted
:D ignition module or coil packs or something else???

any help appreciated

What ECU do you have?

Yeah mate same boat here, i have a power fc though and i think its something do do with fuel/ignition timing vs intake temps on startup?

never sure but last 2 days its been hot and my car has taken a couple of attempts to start.....same in very cold-start conditions.

Go into 'settings' then 'cranking' and have a look at the 50deg and 80 deg settings.

Change the 80deg to 9.0 and the 50deg to 10.0 and see if it starts easy for you.

Johnny Veteran

Johnny

Posted
Posted
Go into 'settings' then 'cranking' and have a look at the 50deg and 80 deg settings.

Change the 80deg to 9.0 and the 50deg to 10.0 and see if it starts easy for you.

oh mad, ill take a look at my controller and report back. Thanks man

Country Cruzin Collaborator

Country Cruzin

Posted
  • Author
Posted (edited)

Apexi power fc, nah mine wont start at all when its hot.

Bought an fitted a new ignition module wasn't that. it was a waste of $900

still have to push start it when its hot :D very embarrising in the middle of town.

ordered new set of splitfires should arrive tuesday

*oh sorry i meant when the engines hot not the air temp.

Edited by Country Cruzin
lolar33 Rookie

lolar33

Posted
Posted

yeah i agree with stevel, sounds like its the starter motor, make sure your alternator is also working though and your battery is ok. should be 13.6ish-14.5ish volts when the car is running(at the battery). and if your battery is over 3 years old id almost consider it f'ed.

adis Experienced

adis

Posted
Posted

Im very confident its the starter motor. I had the same problem 2 years ago when i had a FORD PROBE. Same deal, wouldnt start on odd occasions. Changed the starter my self (easy to do) and the problemm was fixed. Give it a go i say

R31Nismoid Grand Master

R31Nismoid

Posted
Posted
Apexi power fc, nah mine wont start at all when its hot.

Bought an fitted a new ignition module wasn't that. it was a waste of $900

still have to push start it when its hot ;) very embarrising in the middle of town.

ordered new set of splitfires should arrive tuesday

*oh sorry i meant when the engines hot not the air temp.

wont be coil packs either as others have said... push starts = starter motor.

gfunkk Rising Star

gfunkk

Posted
Posted

my mate had this issue, check this thread out

http://www.nissansilvia.com/forums/index.p...=356831&hl=

"yea i had this issue on my rb it was voltage drop ( once the car gets hot the power to the starter is actually less cause the voltage has more resistance in the wire)"

Country Cruzin Collaborator

Country Cruzin

Posted
  • Author
Posted

:) No not the starter motor, motor turns over quite easily for the first six attempts than starts to slow down as the battery gets flatter. just wont fire up.

the reason i think it could be the coils is it runs fairly rough on idle after driving/thrashing it for a fair while, seems to miss a bit down low.

only started doing it since i had a lot of work done to it boost turned up to 20 psi ect. the mechanic said the coils mightn't keep handling it.

an that was his guess of the problem.

dano4127 Veteran

dano4127

Posted
Posted

did you try changing the cranking values as dan said - I have had this exact problem you are describing put up with it for months till I called into ERD last weekend and he has the car hot starting in a matter of minutes...

Douse Collaborator

Douse

Posted
Posted

I have the same problem starting mine when its hot. Not the starter motor as the engine turns over fine. If i don't get it started on the first attempt, it wont start at all....just keeps turning over...

However (don't ask me how i figured it out), if I disconnect the first injector and try again, she will start, then I plug in the injector power again :D:(

I reckon it is over fuelling or something because I can smell the fuel in the engine bay, and black smoke comes out of the exhaust after it starts.

Any other ideas?

BTW im running a NISTUNE remap. Would take it back to the tuners but some 'champ' rear ended me so I have been following that up....

DECIM8 Grand Master

DECIM8

Posted
Posted

Reason is Starter motor, I have it right now.

Unfortunately the starter is fairly expensive. Either the heat shield has been removed in perhaps a clutch install or the starter is shitted itself.

it will eventually die, until then it may start with abit more gas and longer ignition.

secondly its not the tune... at all.

douse sounds like a fueling issue with ur car.

to fix replace starter, install a heat shield. it stops working because the starter absorbs heat and it requires more power to fire. you may want to try run a bigger ground first, check the power at the starter first warm vrs cold. or perhaps warm car up let it sit for 20-30 mins when it absorbs most heat and then hook up a jump start see if it fires then this may mean the battery is rooted.

Finchy33 Enthusiast

Finchy33

Posted
Posted
What ECU do you have?

Go into 'settings' then 'cranking' and have a look at the 50deg and 80 deg settings.

Change the 80deg to 9.0 and the 50deg to 10.0 and see if it starts easy for you.

My 33 has a PFC. When it's really cold it cranks and starts but I have to keep revs up above 1000RPM for a few seconds with the throttle, otherwise it sort of bounces revs and stalls.

Is this a cure or any other ideas???

Cheers,

Ben

blind_elk Grand Master

blind_elk

Posted
Posted
However (don't ask me how i figured it out), if I disconnect the first injector and try again, she will start, then I plug in the injector power again :D:P

I reckon it is over fuelling or something because I can smell the fuel in the engine bay, and black smoke comes out of the exhaust after it starts.

Sounds like a faulty temp sender. The ECU thinks the engine is still cold, so it adds lots of fuel for a "cold start"
Country Cruzin Collaborator

Country Cruzin

Posted
  • Author
Posted

Go into 'settings' then 'cranking' and have a look at the 50deg and 80 deg settings.

Change the 80deg to 9.0 and the 50deg to 10.0 and see if it starts easy for you.

will this change the tune at all??

dont know much about tuning at all, just know it was dyno tuned for hours an was told that, down low on cruise he has kept it as lean as possible an at 20 psi its running rich but on its limit of knocking. an a slight change to the tune an the engine's buggered.

still waiting on new coils should arrive any day they've bn sent. other wise i'll have to plan a trip back to brissy an let mark figure it out.

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