Stage 5, +40s, etc, going LEAN under BOOST? - Page 2 - Turbo Dodge Forums : Turbo Dodge Forum for Turbo Mopars, Shelbys, Dodge Daytona, Dodge SRT-4, Chrysler PT Cruiser, Omni and more!
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post #16 of 77 Old 02-26-2017, 06:09 PM Thread Starter
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Re: Stage 5, +40s, etc, going LEAN under BOOST?

Alright, well, I very dangerously mounted my fuel pressure gauge up inside the car for now.
Here's a video of a little run on the highway I just did.
This is in 5the gear
And i turned my grainger valve down low.
As you can see, at zero vacuum, 0 psi boost, my FUEL is at 60psi. Which should be good.
And when I dip into boost, my fuel pressure does seem to rise about 1 psi per 1 psi of boost.
But my a/f is still around 15! Keep in mind, this is about 2/3 throttle. But still, it should be richer than stoich, right?
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post #17 of 77 Old 02-26-2017, 06:11 PM Thread Starter
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Re: Stage 5, +40s, etc, going LEAN under BOOST?

Maybe I am fine at this level, but I am kind of nervous about trying more PSI, or even more throttle...
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post #18 of 77 Old 02-26-2017, 11:40 PM Thread Starter
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Re: Stage 5, +40s, etc, going LEAN under BOOST?

Like at even 5 psi of boost, isn't 15.0 a/f considered too lean? Or am I wrong here?
Thanks!
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post #19 of 77 Old 02-27-2017, 04:53 AM
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Assuming your A/F guage is accurate, that is too lean.
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post #20 of 77 Old 02-27-2017, 05:02 AM
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Do you have access to a scan tool? If you have good fuel pressure under load and good fuel, that should rule out the fuel system. Hard to believe all 4 new injectors would have a problem. I would look for computer related issues. Do the inputs make sense? O2, MAP, etc.
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post #21 of 77 Old 02-27-2017, 05:43 AM
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Re: Stage 5, +40s, etc, going LEAN under BOOST?

Something else to consider:

You said you are running an LC-1 wideband. Did you replace the stock narrow band with it? Did you install the wideband in the same spot as original? If so, that could be part of your issue. The widebands are supposed to be more downstream than the narrowbands.. The direct exhaust heat will damage the widebands over time in the stock location. Are you using the 0-1V narrowband output from the LC-1?

Maybe something else to look into.
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post #22 of 77 Old 02-27-2017, 07:27 AM
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Re: Stage 5, +40s, etc, going LEAN under BOOST?

As posted above regarding your wideband, Once you verify you are actually lean here are Chryslers Diagnostics for Driveabilty with no fault codes or Codes 51/52.

I would start with Map Calibration.
https://www.turbododge.com/forums/f4/...agnostics.html

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post #23 of 77 Old 02-27-2017, 10:29 AM Thread Starter
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Re: Stage 5, +40s, etc, going LEAN under BOOST?

Quote:
Originally Posted by AndyJ01 View Post
Do you have access to a scan tool? If you have good fuel pressure under load and good fuel, that should rule out the fuel system. Hard to believe all 4 new injectors would have a problem. I would look for computer related issues. Do the inputs make sense? O2, MAP, etc.
Sadly, no access to a scan tool.

The injectors are not new...i bought them used from a guy on this website.
I'm starting to suspect them. When I put in the adjustable FPR before, the hex nut above the o-ring on it galled the fuel port on the fuel rail and would cut any new o-rings put. So I used a deburring tool to take the burrs out out the port port on the rail.... and i think i blew out all the shavings but I'm paranoid some little bits maybe ended up in the injectors.

Maybe it's worth sending them out for a cleaning? Is there a way i can test them?

Quote:
Originally Posted by AndyJ01 View Post
Do the inputs make sense? O2, MAP, etc.
Hmm, don't really know what that means.

Thanks Andy!!
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post #24 of 77 Old 02-27-2017, 10:41 AM Thread Starter
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Re: Stage 5, +40s, etc, going LEAN under BOOST?

Quote:
Originally Posted by 83scamp View Post
Something else to consider:

You said you are running an LC-1 wideband. Did you replace the stock narrow band with it? Did you install the wideband in the same spot as original? If so, that could be part of your issue. The widebands are supposed to be more downstream than the narrowbands.. The direct exhaust heat will damage the widebands over time in the stock location. Are you using the 0-1V narrowband output from the LC-1?

Maybe something else to look into.
Here's how I am running it:

I put a bung in about 16" downstream of the turbo. Just as the instructions recommend. Then put the LC-1 O2 sensor in. The sensor is about 4 months old probably.

I am using the output wire on the LC-1 to feed the computer.

The stock O2 sensor is still in the stock port..
Funny thing. Yesterday, for shits and giggles, I plugged the stock sensor back into the harness and unhooked the LC-1 from the computer. Still had the lc-1 gauge hooked up though. And it ran like crap!!! Showing super lean on the gauge, like 21 a/f. Weird. So i hooked the LC-1 sensor back into the computer and it ran okay again.
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post #25 of 77 Old 02-27-2017, 10:41 AM Thread Starter
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Re: Stage 5, +40s, etc, going LEAN under BOOST?

Wondering if i should call Cindy at FWD Performance.
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post #26 of 77 Old 02-27-2017, 10:51 AM
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Re: Stage 5, +40s, etc, going LEAN under BOOST?

I'm wondering if you actually got +40's?
Used could mean anything, seller could have had a few sets and grabbed the wrong ones?
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post #27 of 77 Old 02-27-2017, 10:56 AM
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Re: Stage 5, +40s, etc, going LEAN under BOOST?

Quote:
Originally Posted by Keith Alto View Post
I'm wondering if you actually got +40's?
Used could mean anything, seller could have had a few sets and grabbed the wrong ones?
+40's will have the part number on the side of them. At least the set I have does...

Easy enough to check.
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post #28 of 77 Old 02-27-2017, 10:57 AM Thread Starter
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Re: Stage 5, +40s, etc, going LEAN under BOOST?

Quote:
Originally Posted by Keith Alto View Post
I'm wondering if you actually got +40's?
Used could mean anything, seller could have had a few sets and grabbed the wrong ones?
I'll check but it was running perfectly on these injectors for several weeks until recently.
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post #29 of 77 Old 02-27-2017, 08:37 PM Thread Starter
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Re: Stage 5, +40s, etc, going LEAN under BOOST?

Guys, is there a way to "squirt" the injectors with the fuel rail off and see if they are spraying good?
Might be a stupid question.....
Just don't wanna spend $100 on getting my injectors restored if they are already fine.
Thanks
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post #30 of 77 Old 02-27-2017, 08:42 PM
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Re: Stage 5, +40s, etc, going LEAN under BOOST?

Quote:
Originally Posted by jenkins71 View Post
Guys, is there a way to "squirt" the injectors with the fuel rail off and see if they are spraying good?
Might be a stupid question.....
Just don't wanna spend $100 on getting my injectors restored if they are already fine.
Thanks
Yes, with one of these, this is used to run an injector balance test along with a fuel pressure gauge, I have owned one since 1989.

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