Hes reading 90 psi at idle and not in boost. Drops 1/3 right after/as car gets into boost

 

Change the fuel filter. Something is wrong.

If the guy is as big as you say, he should be able to fix it

 

Are you running a wideband? Or just using lambda off the stock narrow band and assuming the injector is performing as listed (TLDR if you mentioned the addition of a wideband)

 

I have a wideband yes. Car was idling at 14.7 when i last ran it still on pump gas. He tunes off lambda which he got to 1 with

 

Any idea what your A/F or lambda was at WOT with your prior tune?

 

the thing on the fuel rail is a fluid damper. If he is really getting 90 psi of fuel pressure (double check with another gauge) then it has to be either fuel pump, fuel filter, or the line from the factory regulator

 

Thats bull your getting charged for two tunes. Sounds like an *******, if there was such an issue he shouldn't have put so much time into it.

 

Dont know for sure my old wideband quit on me months ago

Ok thank you. Now to source one or all of those parts.

Oh this is so much fun ()

 

Hmm i wonder why i never got a code for any of this tho...

Al, i may have to say forget the retune from sound performance and just limp the car your way next weekend lol

 

Start with the fuel filter, but I'm kinda doubting that your seeing 90 psi of fuel pressure.

Someone that knows cobalts (Alan) would be much better off tuning/diagnosing issues than a LSX guy

 

See in retrospect it would have been better for me to replace my pump with a nice ethanol pump then i would have replaced the filter lol

 

Get a rsfs or brfs. Pick a nice e85 pump and call it a day.

 

why would they continue to tune the car knowing there is an issue...I'd be kinda pissed

 

Yeah... What doesn't make sense is it's dropping to where it should be at all times.

Just let me know Adam. I have a local dyno rented out the 19th

 

Ohhhhhhh shiiiiit. I heard there's gonna be some broken records goin on!? What kind of shenanigans you up to?

 

Well Al, considering there's no gaurantee the shop will properly tune me even after this B.S. is fixed and the price they charge compared to you i think i'm gonna have to bring it your way on the 19th!

 

I don't want to say I told you so, but....

 

That sucks adam...

 

Just let me know


And stone if you want part of it, you'd better hurry.

 

would have been fine had my fueling been right dude, this fail has nothing to do with the tuner besides perhaps the fact that he could have found out sooner instead of tuning it as is, but that's really my responsibility i guess.

 

rice sounds like the intanke regulator is sticking I would replace the filter and drop the tank and check out the regulator

 

I take it the ss's use the same regulator and filter as a base model? because autozone and napa never carry ss specific parts

 

I always purchase from Tom at CED when it comes to parts like this.

Give Tom a call.

 

I did hes gotta get back to me

After calling another gn dealer they say gm only sells the pump and sender deal together and its 40p+ bucks and he wasnt sure if that includes the regulator.

 

the regulator is on the outside of the tank? this is quite confusing to me as to be expected

or are there two regulators? i know i've seen something that i think is a regulator on the outside of the tank up on the rail