Hi, for about a week now when starting ("cold") it starts cranking and sometimes (almost everytime) i hear like a BIG...... "explosion". Ok the sound is like a "pop" but a damn big pop and im scared it will be the starter, i can get a video with sound, but since it happens 70% of the time i could not be sure to get it, also it started after i "tightened" the alternator/ac belt tensioner, but a friend of mine said that is not the problem since it does not give anymore problems than that.


BTW: when i said cold is what could you expect of a first start but at 87-97 Fahrenheit

 

i have the same problem did you find the problem why your car is doing that i seem to not able to

 

I've heard about this before, I think it's an intake backfire. Do a search.

 

can the s crank pulley be afecting this i changed it to unortodax

 

sounds like timing belt jumped a tooth but i think urs has a chain

 

Useless info without a video

 

i will take the video now... so around 1:00 pm i will have it.

 

agreed. as ****ty as it sounds... a 'burp' through the intake almost always indicates a timing problem.

 

not really if you know how to work on an engine and have worked on them for a while.

 

how could my car have jumped a thooth? how could this happen? (is that is the problem), i took a video but the "pop" sound didn't happened (tried like 8 times) but the sound does happens it just happens that today is my unlucky day

 

Does it start rough?

 

well... when it does the "pop" i starts at the 2nd try, otherwise the 1st

 

well does the car start and run after? or just crank and make this pop noise?

 

starts and runs after.. sometimes second try, otherwise 1st

 

if it was the timing chain id expect it to run rough, check fuel pressure, spark plugs?