Around 43 with hose off, approx 33 with hose on.

On boost it should increase 1:1

 

You should be aware by now that there's no way in hell a stock FPR can control the pressure of a 450 pump.

Likewise "speed density" on fuel temp isn't speed density so it'll never work right either.

The tune will change with the weather.


You're also going to see a spike in fuel pressure when the hobbs switch operates.


Changing injector latency is pointless because the required latency depends on fuel pressure which in your case is now a variable.

You're the one continually giving out the misinformation.


Your bad tuning melted a plug electrode then blew the head gasket.

Not quite "running great" ?


It's called "creeping death".
It gets worse with time.

https://www.evolutionm.net/forums/ev...-up-boost.html

https://www.evolutionm.net/forums/ge...ark-plugs.html

 

With a pump controller it can. I speak from experience.

 

OP already knows the fuel pressure is out of spec but chose to ignore it.......from here.


https://www.evolutionm.net/forums/ec...-afr-help.html

 

This guy.

 

Actually he isn't. If you take some time to get out of your red mist you will see he is taking the steps to find out what is going on with his fuel pressure.

 

Fuel pressure it was tuned for won't cause new issues. Slight tune changes due to weather also won't cause this large of an issue.


Something is going on, you should not have had to adjust your tune as much as you did, suddenly seeing -12 trims, adjusting, then seeing -12 trims again means something is amiss. That doesn't just "happen".


Does your car still have the fuel pressure solenoid? If it does, it could be stuck closed, so your FPR isn't seeing vacuum to drop fuel pressure in low load situations, and its not seeing boost to raise fuel pressure.

 

The fuel trims only wacked out once not twice. I have the fuel pressure solenoid deleted. Fpr goes straight to manifold. It got real cold here in southern california lately so im guess thats why my trims got whacky.

I still think its spark related. Im gonna throw some new plugs in soon.

I feel like it became less sputtery with the smaller gap at 0.19. Maybe my coils are tired. I measured resistance. Its with in spec but you never know.

 

The difference is when I realize I'm wrong about something I will want to correct myself, because unlike you, I would rather admit when I'm wrong and move on. I also don't claim to be certain of things im not certain of. Notice how i couched my statement with "You would think"? Thats because I'm not claiming my answer as fact. You on the other hand like to preach fuel pressure like its a certainty but TBH I have never seen you give a single piece of supporting evidence to back up any of your BS claims. Like the 450 claim of over running the regulator...sure it might over run the regulator with the pump at full tilt and the injectors doing nothing, but in reality it never operates that way.

 

I just ignore the guy.

 

Is there any way to datalog injector duty cycle? Just to see what the ECU is telling the injectors to do at that moment.

 

Of course, Evoscan logs IPW and therefore IDC.

Just IPW itself doesn't tell the whole story though.

 

yes i logged the stutter but idc seems fine. no drop off or something.

 

How do i upload my logs?

 

Then it's not fuel cut commanded by the ECU.

It's a stutter and not a "I just hit a brick wall and my car wants to throw me through the windshield", right?