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-   -   Loud exhaust explosions, too much carbonization and fuel after the throttle valve (http://mustangforums.com/forum/5-0l-1979-1995-mustang/711241-loud-exhaust-explosions-too-much-carbonization-and-fuel-after-the-throttle-valve.html)

matheus.mattia 06-23-2014 07:28 PM

Loud exhaust explosions, too much carbonization and fuel after the throttle valve
 
2 Attachment(s)
While disassembling the throttle body, I noticed that had too much carbonization and fuel (actually leaked as can be seen on photo) right after the throttle valve (I had cleaned about 1 year ago)... Is this normal? Another problem that I have is the exhaust (it's seems to be) explode(really loud pops) some times when I accelerate and leave the car go by the inercia...

Why is there fuel there? Bad valve timing? And is this causing the exhaust pops?

Thanks!

dawson1112 06-23-2014 08:28 PM

The only way I know of for fuel to enter the throttle body is through the fuel pressure regulator. If it is bad it will let fuel leak past into the intake. Pull the vacuum line off of the FPR and if it is wet with fuel then it needs replaced.

The popping is from having an excess amount of unburnt fuel in the exhaust.

matheus.mattia 06-23-2014 10:29 PM

Quote:

Originally Posted by dawson1112 (Post 8401851)
The only way I know of for fuel to enter the throttle body is through the fuel pressure regulator. If it is bad it will let fuel leak past into the intake. Pull the vacuum line off of the FPR and if it is wet with fuel then it needs replaced.

The popping is from having an excess amount of unburnt fuel in the exhaust.

I'm gonna check this tomorrow... But a bad FPR will result in an excess amount of unburnt fuel in exhaust or the problems aren't related?

Thanks!!

dawson1112 06-23-2014 11:03 PM

Bad fuel pressure regulator with a leak in the diaphragm will buld to much pressure and also fuel sucked into the vacuum line to the intake gets pulled into the cylinders as well.

matheus.mattia 06-24-2014 05:05 PM

Quote:

Originally Posted by dawson1112 (Post 8401927)
Bad fuel pressure regulator with a leak in the diaphragm will buld to much pressure and also fuel sucked into the vacuum line to the intake gets pulled into the cylinders as well.

It wasn't wet, any other guesses?


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