Vortec 454 Revs up high then dies HELP!!

[Tom P]

Thats good news. You could try resetting the computer by disconnecting the battery cables and holding them together. This will reset the fuel trims. Its possible your computer was trying to compensate for something and now you're seeing the side effects. If that doesn't work than I will still say you need to know what your fuel pressure is. Anything too low and the fuel wont atomize properly and you're slobbering. Right now I'm running at 46-48 psi which is low but good enough for now.

 

[Christian Steffen]

New injectors and a healthy application of gasket sealer seemed to do the trick. Now it's just running real rich. Thanks for the help guys

How rich are we talking? Glad to hear its running!

 

[Brice Edwards]

How rich are we talking? Glad to hear its running!

To the point where it sounds like it has a cam at idle and if its idling any lower then 1k and I give it gas, it bogs down and almost dies

 

[Christian Steffen]

Did you get something to datalog it with? Sounds lean rather than rich to me.

 

[Brice Edwards]

Did you get something to datalog it with? Sounds lean rather than rich to me.

I believe my obd2 reader can datalog. I'll see what it says on my lunch break

 

[Brice Edwards]

My code reader does get live data and datalog. what should I be looking for on it?

 

[Tom P]

Fuel trims to start

 

[Brice Edwards]

Fuel trims to start

Looks like its all the way on the rich side at idle then goes down once I hit the gas

 

[Christian Steffen]

Looks like its all the way on the rich side at idle then goes down once I hit the gas

So the fuel trims are negative then? Does not surprise me that they change when you hit the gas, that's normal.

What percentage negative are they?

 

[Brice Edwards]

So the fuel trims are negative then? Does not surprise me that they change when you hit the gas, that's normal.

What percentage negative are they?

25, the long term trims were at 50