It doesnt have to be overnight. Half an hour to an hour would do it. If you turn of your engine and turn it back on and its fine, then i think i'm right. It would not affect the rpm. Your engine would be normal once it starts up. The leakage is very slow. If you let it leak for over half an hour, then it'll lose pressure, but if its constantly running with engine on, the pressure is normal.

 

you use an chemicals to clean it or just water and cloth through it?

 

NOT SURE if anyone posted this, cuz i did not read the whole thread...but I had an odd starting problem, sometimes it would do nothing...other times it would strain then start. It turned out to be an antenna in the car that receives the signal from the chip in the key. I know its a long ****, but just putting it out there. Took my dealership like 4 days to figure out what the hell it was.

 

This is normal with our type of fuel injection...
You should pause for a moment when the ignition is on (this lets the fuel pressure build to an acceptable range)and then crank the engine for another full second or until it's running... If you crank too long the starter will wear a little so you have to use your judgment on this; you will hear it if you crank too long.

If you crank before the fuel pressure has reached it's operating range the attempt will fail and then it will take a much longer crank time (many more revolutions) for the system to adjust and sync itself for the next start. This is why when cranking after a failed start takes much longer.

If you give it enough time to pressure up the fuel rails, it will start the first crank every time.

 

I used Throttle Body cleaner and I wiped it with a cloth...I don't remember the brand but they had it at pepboys

 

the same has happened to me like 7 times and my momo has also said its happen to her. idk

 

thanks

 

What brand was it?

 

Mmmmkay. Here's what I did that fixed it (for me at least):

1. Disconnect battery
2. Remove MAF housing.
3. Clean MAF with CRC brand MAF cleaner (Per MAF Cleaner's instructions).
4. Let dry thoroughly.
5. Disconnect Z tube.
6. NOT NOT NOT disconnect TB wire.
7. Spray CRC TB cleaner onto butterfly valve, and TB intake pipe.
8. Wipe out with cloth, thoroughly. There was a LOT of gunk on this! Hadn't been cleaned in 108k miles.
9. Spray CRC TB cleaner onto rag, push butterfly open gently and rub back of butterfly valve and TB tube.
10. Repeated until no more black gunk was on the rag.
11. Reconnect everything.
12. Let car sit for two hours to make sure everything that could evaporate off did.
13. Started car. (Just fine as it always does during a cold start).
14. Warmed up car.
15. Stopped engine.
16. *Fingers crossed* Started it up while engine was warm.
17. Bingo! Engine started without any hesitation, surging, RPM fluctuations, etc.
18. Smiled and shut it off.

I should have checked separately whether it was the TB or MAF that needed cleaning. However, it must have been one of those two in my case.

Good luck with everyone else's engines! And thanks to those that pointed out cleaning the TB and MAF.

-andrew

 

anyone else have insights on this issue? Still not fixed and hard to duplicate for the dealer to see.

 

Do they check the throttle body thing during major service?

 

i have an 04 AT with 32K.. i experience the same problem.. i have an injen cold air intake.. i clean my air filter mabe about a month ago and reoiled the filter.. im pretty sure i didnt put to much oil on the filter.. but it sounds like my car is about to die when i start up.. only have i drive it for a long period of time does it stop. so idk.. maybe i might take the advice and clean the throttle body

 

mine has just started about 2 days ago- for some reason in the morning when i start up my car it starts fine- when i get to work and let it sit out in the sun (it's been getting real warm out here now) i hop in the car, turn the key , depress clutch all the way down, attempt to start and then i get engine hesitation big time- car doesn't shut off at all but the engine sits hesitating so i shut it off myself just so i don't mess anything up- repeat the steps again and 2nd time i get a little hesitation but engine fires up and acts normal- i don't get a CEL at all, so i guess i need to clean the throttle body?? I just recently had my 30k service done on my car , I thought they would have cleaned this or something

 

I had the same problem, and fixed it last weekend by removing the upper plenum and cleaning out the throttle body. After that, it starts right up with no issues every time.

 

i checked my throttle body and the MAF and both seem to be clean- however i checked my POP charger and it was dirty as hell- even had some gunk buildup- not sure if that would case my bad start up but i cleaned it out and am testing it today