fuel questions

[josh38127]

I just got my car running AGAIN. When I drive it won't rev above 3500. When I am parked it rev just fine. However if I stall it up to 2000 then rev it a 4 inch flame will shoot out the tailpipe. I drove for 3 miles and it turned my tailpipe gold. Is this fuel cut? The car stock. I also have hacked the air can,but the lower honeycomb not removed.

 

[Gasolinebaptism]

I'll describe fuel cut for you.
The ECU will see knock, attempt to pull timing so it doesn't knock, if that doessn't work than the ECU will cut signal to the injectors. And since even when you are decelerating with foot off the pedal, there is still an explosion in the chamber, it gives a new feeling from the INTENSE compression braking. it's almost like hitting a brick wall.
If you're backfiring, I would thing your timing is off.

 

[Calan]

I'll describe fuel cut for you.
The ECU will see knock, attempt to pull timing so it doesn't knock, if that doessn't work than the ECU will cut signal to the injectors.

Fuel cut has nothing to do with knock or timing. It is simply the ECU cutting the signal to the injectors when it sees more air entering the engine (via the MAF) than it is programmed to handle.

http://www.dsmtuners.com/forums/frequently-answered-dsm-questions/186971-what-fuel-cut.html
DSM's and Fuel Cut

 

[josh38127]

Ok. thanks.. If my timing is off can that cause the black dust to appear on the inside of my tailpipe

Quote:
Originally Posted by Gasolinebaptism
I'll describe fuel cut for you.
The ECU will see knock, attempt to pull timing so it doesn't knock, if that doessn't work than the ECU will cut signal to the injectors.

Fuel cut has nothing to do with knock or timing. It is simply the ECU cutting the signal to the injectors when it sees more air entering the engine (via the MAF) than it is programmed to handle.




____________________________
Craig


how can I fix this

 

[Gasolinebaptism]

Well just about every car out there has carbon deposits in the exhaust. but to what extent is it?

And Calan is right. I knew what I was talking about at one point in my life though. haha

 

[Calan]

Ok. thanks.. If my timing is off can that cause the black dust to appear on the inside of my tailpipe

Originally Posted by Gasolinebaptism
I'll describe fuel cut for you.
The ECU will see knock, attempt to pull timing so it doesn't knock, if that doessn't work than the ECU will cut signal to the injectors.

Fuel cut has nothing to do with knock or timing. It is simply the ECU cutting the signal to the injectors when it sees more air entering the engine (via the MAF) than it is programmed to handle.

____________________________
Craig

how can I fix this

Updated my post with some links that may help you ^^^

 

[josh38127]

Its just like dust.. But it doesn't smoke ( Actually its like soot from a chimney)

 

[Gasolinebaptism]

Well it's common, my moms brand new honda civic with 25,000 miles has carbon build up.

 

[josh38127]

never mind i see them

Thank Calen.. I read it I now what is going on and I bet I can get her fixed.