Starting delay sometimes

[pwuser160043413886]

vitz 2008.
my car starts normally in the morning, after driving of 9-10 kms and rest of 30-50 minutes it starts after 3-4 seconds delay. but if the rest period is long i mean 3-4 hours. it starts normally again. what is the reason.? car runs smoothly. no check engine light come on dashboard panel.

[Hassan1991]

Does the Stater cranks the same way as in cold?

[pwuser160043413886]

in cold it cranks normally.
if i drive 9-10 kms then swithed off. do some rest of 30 minutes it takes 3-4 seconds to start. but if rest is of 2-3 hours then it starts normally without delay.
in the morning i mean after 14-16 hours it starts normally.

[pwuser160043413886]

if i turn on the ignition in the morning. it cranks normally. i take drive 9-10 kms. i turn off the engine. i turn on engine immediately then it starts normally. but if i wait it for 30 minutes then it take some delay in start of 3-4 seconds. engine round is full. if i wait 3 hours it starts normally again without delay. very weird situation i think

[Hassan1991]

how does the starter cranks when it take 3-4 seconds ?

[pwuser160043413886]

well it sounds like engine is getting power slower and slower. engine is taking his full round. and i want to tell that i am using only high octane. the problem is not before that.

[Hassan1991]

Ecu has timing mapped for regular fuel.
100% High octane is never recommended on stock cars.
you should check the spark plugs.
do you see any black carbon in exhaust pipe?

[pwuser160043413886]

there is no black carbon.
i recently changed the plugs to new genuine denso plugs from toyota. but the problem was before that.
what is ecu.?and what do you mean by stock car.?

[Hassan1991]

ecu (electronic control unit) , stock means in factory state.
if you have an obd2 device connect it.
and share the results. you are using car on high octane, your fuel trims would be disturbing.

[dms664]

There are only two components that can go wrong here. The battery or the starter. Before you touch the starter, get the battery checked. I am confident that the battery is the problem in this case. Loan a battery and switch to it when problem arise. If it starts then its clearly battery problem. If car still does not start then try pouring water over the starter motor solenoid (small cylinder like part attached to starter motor) and ask someone to start. If this resolves the problem then its sticking solenoid, just get it serviced. It gets carbon deposit inside which any electrician will clean it throughly with petrol and apply thin layer of engine oil over the solenoid piston. Another culprits can be the bushes inside the starter but first thing first check the battery.

[pwuser160043413886]

i scan through the toyota tab. there was no error. not any single fault.they were also confused. but my friend from toyota suggested me to next time fill the tank with 50 50 ratio. half normal petrol and half high octane.then there will be no problem.
at present time i am not facing any problem. the signs i am discussing these are of 1 month before. there is no problem i am facing. and i am 100 percent sure. it will be due to high octane. ok. thanks for your help.

[pwuser160043413886]

yes. sounds interesting. good info. thanks for sharing good thoughts.i will check it.

[aziz.rehan]

Check fuel pump pressure

[pwuser160043413886]

it is alright dear.

[aziz.rehan]

How old is the battery?

[Hassan1991]

if you have the results of fuel trims when you scanned. do share them.
yes it will not throw error code until trims go above the limit.

[pwuser160043413886]

new. 1 month old. 11 cell. osaka

[pwuser160043413886]

ok dear. i will share if i find something

[pwuser160043413886]

problem was solved a week ago.
the problem was due to safety valve of the fuel pump.
not ecu problem. not solenoid problem.
not problem due to high octane.