P0171 and P117B after Edelbrock SC FIXED

[CSG Mike]

Comparing DI to PI use and trims indicate electric fuel pump is fine.

[snowtaipan]

Originally Posted by steve99

if you have not already checked make surexthe DI computer has all 3 mount bolts tight especially the bottom hard to get one, if its not earthed weird stuff happens

I added an additional ground wire to time this out.

[snowtaipan]

Originally Posted by CSG Mike

Comparing DI to PI use and trims indicate electric fuel pump is fine.

Per Edelbrock I pulled the fuel supply line to test. Standard was 50-75 PSI I was at 59psi at idle. After turning off pressure slowly dropped from 59 to 40 over probably 7 minutes, then held at 40 for over 10 until I released pressure. So that's a double confirmation.

Also that fuel line is a pain in the ass to remove and even worse to reinstall.

[snowtaipan]

Originally Posted by tomm.brz

he has no significant misfire

also it has same behaviour both while using PI or DI
with DI ltft is even higher since the tendency of the stock injectors to lean out a bit because they are unbalanced in respect of the DI
to me the suggestion of Edelbrock is a bit of a waste of time, but since you can... do it
I took a look at all of his logs, the trims and all the other values (afr, injectors opening time and fuel quantity) look ok
Ltft goes high with maf voltage under 1.3volts, but to me, it's high because it really needs that extra fuel caused by a wrong maf scaling down there

The car even idles not bad, when i had a intake vacuum my idle would rise by itself and swing a lot and throw huge quantity of fuel that immediately be seen from logs and an extreme smell and ample from exhaust
Maybe i'm wrong and it's mechanic, hope you resolve

I'm really starting to lean this way. I know for a fact my idle was at 850-900 before install. It's also developed what I hope is an annoying noise (3 kinds of noise a car makes: annoying, expensive, and the kind where you light it on fire and collect insurance.)

I put a stethoscope on it and it's 100% conferring from the TB, and it's new.

[snowtaipan]

I'm really hoping Edelbrock can figure this out, not just for me but do the next guy doesn't have issues.

[Irace86.2.0]

Originally Posted by snowtaipan

I'm really starting to lean this way. I know for a fact my idle was at 850-900 before install. It's also developed what I hope is an annoying noise (3 kinds of noise a car makes: annoying, expensive, and the kind where you light it on fire and collect insurance.)

I put a stethoscope on it and it's 100% conferring from the TB, and it's new.

That is with the car in the on-position but not running? Is it the high pressure fuel pump without fuel or something?

[snowtaipan]

Originally Posted by Irace86.2.0

That is with the car in the on-position but not running? Is it the high pressure fuel pump without fuel or something?

IGN ON. It's 100% from the throttle body.

This car isn't being very appreciative... Dropped $5k on a really well reputed supercharger and she's just fighting it!

[Irace86.2.0]

Originally Posted by snowtaipan

IGN ON. It's 100% from the throttle body.

This car isn't being very appreciative... Dropped $5k on a really well reputed supercharger and she's just fighting it!

You removed the harness from the throttle body position sensor, and it stopped making the sound?

[snowtaipan]

Originally Posted by Irace86.2.0

You removed the harness from the throttle body position sensor, and it stopped making the sound?

Used a stethoscope

[Irace86.2.0]

Originally Posted by snowtaipan

Used a stethoscope

Try removing the harness from the throttle actuator/position sensor then try turning to the on-position. If the noise goes away then it is likely not anything mechanical/electrical with the throttle body, right?

[tomm.brz]

boys.... that noise is super normal with ignition ON
you becoming paranoic with leaks and problems that don t exist!

[snowtaipan]

Originally Posted by tomm.brz

boys.... that noise is super normal with ignition ON
you becoming paranoic with leaks and problems that don t exist!

I'm not paranoid, my car's it to get me, it's the monkeys in the back yard man! They're ninjas hired by the mafia to ruin me

[Ultramaroon]

It's normal. Yours is actually super quiet. I thought by now that you guys would be working on dbw stuff. No?

[Irace86.2.0]

Originally Posted by Ultramaroon

It's normal. Yours is actually super quiet. I thought by now that you guys would be working on dbw stuff. No?

I couldn't remember off hand, and I can't recall the last time I listened to the engine bay without the car running, but in the on-position. Even then, my electric water pump might be louder.