Hey guys. I recently upped the boost to 15lbs today and went out for a rip to get some baseline numbers

I richenned up all my boost portion and got it running at about 10.8:1 up to about 10 psi. I then gave it and went for 15psi in 3rd gear and as soon as the boost gauge shot up past 12psi or so the number leaned out crazy fast.

Went into turboedit and added 20% fuel, the number in the cell is 20.62

I ran that car on this and did the pull in fourth gear this time and once again @ about 4k rpms and 13+ pounds the numbers started leanning out fast

The car is an 88 Crx si, dsm 450's, turboedit running a gm 3 bar map sensor and walbro high flow pump. Adjustable FPR set at 41 or so psi

I need some help on this. Let me know what I can do

Thanks guys

 

are you 100 percent sure you have turbo edit set on gm 3bar, because it sounds like its cutting out right at where the stock map sensor blanks out...?

 

i dont know, it runs to 15psi without throwing a code, just goes dam lean

Dont know how to check though

 

it may not throw a code, im not sure tho...id just go into your basemap and double check to make sure ure set up for a gm 3 bar and you don't have like a rev limiter or something set...can't hurt to check

 

 

raise your fuel pressure.

 

Say I up teh fuel pressure to 46psi or something like that

Is there a forumla to get my maps back to normal pretty easily??

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by AudioXtremes &raquo;</TD></TR><TR><TD CLASS="quote">raise your fuel pressure. </TD></TR></TABLE>

What is your fuel pressure off vacuum?

 

What type of fuel regulator are you using? if it is the B&M, ebay, etc (cheap). Those regulators won't hold high pressure at all because you are using the stock diaphram. You should get a Holley or AEM, etc.

Check you injectors, they may not be fully functional or just saturated.

If all of this checks out then it may be time to try BRE instead turboedit and it may be time to get larger injectors.

 

I didnt think bre supported boost but its been a while since I looked at it.

 

Well I just turned the boost down to 10 psi and as soon as it hits and hold @ 10psi at around 4000rpm the a/f start to rise quickly again, its runs in the 10.5:1 range until 10psi and then just skyrockets

It was never like this before

I also turned down the **** on the BNM pressure regulator about 2 spins, my air fuels at idle changed so it richenned up and I raised the pressure (no gauge to support this anymore, my marshall one aparently crapped out)

So Im stumped and dont know what to do

Need some help, could my b&m regulator be messed somehow, wouldnt it be failing at other areas as well or is it under stress when under boost? I do have 2 stockers


Modified by W O T at 9:18 AM 6/25/2006

 

Have you tried putting your stock map back in and tuning it at 10psi to see if it holds then?

 

ALrighty, I'll swap back in a stock regulator tonight

Kinda sucks but hopefully this is an easy fix and this is actually the problem.

 

I put the stock regulator in, it definetely raised my fuel pressure and I had to redo my entire tune, got it dandy tonight and went boosting, its still set to hold @ 10psi and the ******* numbers just keep leaning out, I dont know what to do here

 

did you ever check on your file to see if you have it set on gm 3bar?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nappyroots827 &raquo;</TD></TR><TR><TD CLASS="quote">did you ever check on your file to see if you have it set on gm 3bar?</TD></TR></TABLE>
First thing I would have done you just cant install a 3 bar and call it a day.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nappyroots827 &raquo;</TD></TR><TR><TD CLASS="quote">did you ever check on your file to see if you have it set on gm 3bar?</TD></TR></TABLE>


Ditto.. Make sure of this above all.

 

yes its set to 3 bar