Edelbrock Proflo 4

[Fastereddie]

Just reloaded the map it’s the default

10-4, I have never messed with the pf-4. Just noticed it. I would double check all your settings. Is the afr stuck at 11 all the time?

 

[skunked]

His fuel pressure seems low to me. Mine never drops below 47.

 

[Bent77]

And it went from -30 to 0 on the trim. I’d check the O2 function next

 

[Bent77]

His fuel pressure seems low to me. Mine never drops below 47.

Shouldn’t make a huge difference at idle, but filter could be plugged if it’s supposed to be 58psi

 

[Chevk587]

Which map? And did you get the IAC and idle set correctly

Yes when it’s working right then all of a sudden it takes off and no matter which way I turn the adjustment it doesn’t recognize it .

 

[Bent77]

Back up and redo the procedure exactly as the manual states. If you try to do it outside the IAC set portion of the program, you’ll just piss it off

 

[Chevk587]

Which map? And did you get the IAC and idle set correctly

Yes when it’s working right then all of a sudden it takes off and no matter which way I turn the adjustment it doesn’t recognize it the map is 5017.

 

[Chevk587]

View attachment FullSizeRender.mov

 

[Bent77]

You should set that timing and then stop messing with it

Seems like it’s happier though

 

[Chevk587]

Back up and redo the procedure exactly as the manual states. If you try to do it outside the IAC set portion of the program, you’ll just piss it off

I have a few times now . Runs great for awhile I’d say 5min or so then all of a sudden it takes a hard right lol . Timing is 12* before TDC IAC between 5 and 15 %

 

[Bent77]

The computer is adding and subtracting timing, so when you unlock it and relock it, it’s pissing it off. Set it and leave it

Next thing to look at is why the fuel trim is -30 and the AFR is 11 something. Should smell rich if it’s that high

The hard right is probably when it’s trying to sort the idle vs AFR. It should be able to stay near 13.5:1 for idle

 

[Bent77]

Still swinging from 9 to 33 degrees on the advance?

 

[Chevk587]

The computer is adding and subtracting timing, so when you unlock it and relock it, it’s pissing it off. Set it and leave it

Next thing to look at is why the file trim is -30 and the AFR is 11 something. Should smell rich if it’s that high

The hard right is probably when it’s trying to sort the idle vs AFR. It should be able to stay near 13.5:1 for idle

Definitely rich where should I start ?

 

[skunked]

Shouldn’t make a huge difference at idle, but filter could be plugged if it’s supposed to be 58psi

he’s using an adjustable FPR aren’t you too?
@Chevk587 have you cycled the key on watching the fuel pressure reading?

 

[Bent77]

Have an open exhaust or a leak on the bank with the O2? It may be adding fuel to try to burn oxygen not being introduced through the throttle body

 

[TankedUp]

My go to is fuel filter. Every time I’ve had a Hiccup with mine that fixed it right up. But your could be o2 sensor. Just my .02 cents but I’d swap fuel filter. See what happens.

 

[Chevk587]

he’s using an adjustable FPR aren’t you too?
@Chevk587 have you cycled the key on watching the fuel pressure reading?

Comes in at about 50psi then drops fast to about 15psi

 

[Chevk587]

My go to is fuel filter. Every time I’ve had a Hiccup with mine that fixed it right up. But your could be o2 sensor. Just my .02 cents but I’d swap fuel filter. See what

Have an open exhaust or a leak on the bank with the O2? It may be adding fuel to try to burn oxygen not being introduced through the throttle body

there is a small leak on the passenger side would that effect it ? Brand new filter.

 

[Bent77]

Comes in at about 50psi then drops fast to about 15psi

Time out

change the filter and start over, otherwise the FPR is fooked

 

[TankedUp]

there is a small leak on the passenger side would that effect it ? Brand new filter.

Missed that. May have had a drink or two. I’m no help. Carry on. HaHa.