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Old 05-16-2018, 04:53 PM   #1
rms2005
 
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missing out at wot=stumped

hey guys I could sure use a hand here, I think i might have a fuel pressure issue but not sure. car was on the dyne last saturday after cam and bolt ons and ran fine. I drove it for a day or two (no wot)and its fine this morning my little boys says go fast daddy, alright here we go but not so fast like. seems to run fine except for wot. after i dropped him off i made a couple hard pulls and it does it pretty bad. not down low in say 3rd gear but if you hammer it 1st it does it, hammer it in 2 from about 3k does it. changed plugs and wires for giggles. checked and cleaned maf. sprayed starting fluid over anywhere air could leak. got out the sct x4 and its showing about 19psi. seems awful low to me but does the sct read it at the pump or up at the rail or does it matter. driving me nuts cause i just bought this thing, done the work and now this. had it about three months and have driven it about 200 miles. no codes by the way.
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Old 05-16-2018, 05:25 PM   #2
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just took it out right now again and it seems like it runs fine before everything gets heatsoked. ran fine several pulls for 8-10 minutes then runs like crap again. kinda feels and sounds like an old rev limiter that drops cylinders.


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Old 05-16-2018, 05:53 PM   #3
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What mods have been done to the engine?
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Old 05-16-2018, 09:23 PM   #4
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Originally Posted by 1911 1LE View Post
What mods have been done to the engine?


tsp stage 3 cam, headers, exhaust and cai. and dyno tune


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Old 05-16-2018, 09:40 PM   #5
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Man, Iím no paid shill for anyone but Iíve been hanging around here long enough to know that if Ted Jannety, Ryan at GPI, or Dyno Steve didnít do your tune on your Camaro, post mods, yer Fooked. My nightly prayers include, Ďplease Lord, let these guys still be around when I finally mod MY Camaro!
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Old 05-16-2018, 10:12 PM   #6
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While ryan is a good tuner and I'm running GPI cam, those are by far not the only three. They are really just the three talked most about on C5.
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Old 05-16-2018, 10:30 PM   #7
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While ryan is a good tuner and I'm running GPI cam, those are by far not the only three. They are really just the three talked most about on C5.
And represent goodly portion of a fairly large group who share similar vehicles. Hard to argue with that
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Old 05-16-2018, 11:12 PM   #8
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Fuel pressure? AFM gauge reading? Injectors? I had this happen on occasion and i was running out of fuel. It was not frequent, but happened at WOT after I had been running for a while. After I upgraded injectors, pump and fuel rail the problem disappeared.
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Old 05-17-2018, 08:48 AM   #9
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Was the 19lbs at idle? That is very low. I'm running around 60lbs, give or take, at the rail. Under load, it dips a little, a pound or two. Sounds like you do have a fuel delivery issue.
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Old 05-17-2018, 10:34 AM   #10
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The pressure sensor is forward of the fuel tank in the feed line.
The pressure, key on engine off command pump on with scan tool should be 50-60 psi.

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Old 05-17-2018, 11:54 AM   #11
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What part of S. Central Texas are you at?
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Old 05-17-2018, 02:42 PM   #12
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i am in new braunfels, 25 miles east of san antonio. the 19lb is coming from the handheld but it is pretty consistent 19 everywhere which kinda leads me to believe thatís just what the sct is reading. i was leaning toward changing the pump today but since it shows 19 when cold and runs fine then shows 19 when heat soaked runs like crap i donít know if the sct is misreading it or what the heck the deal is. iím going to try to find a gauge to put on the rail. iím not really getting how it can runs so bad and not throw a code also.


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Old 05-17-2018, 03:11 PM   #13
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You know one of the best tuners is in your backyard? HPT
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Old 05-17-2018, 03:25 PM   #14
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Originally Posted by Moto-Mojo View Post
Man, I’m no paid shill for anyone but I’ve been hanging around here long enough to know that if Ted Jannety, Ryan at GPI, or Dyno Steve didn’t do your tune on your Camaro, post mods, yer Fooked. My nightly prayers include, ‘please Lord, let these guys still be around when I finally mod MY Camaro!
They're talked up here, but go to other forums and you'll barely see their names mentioned. GPI gets mentioned but jannetty and RDP are hardly mentioned.

Ls1tech isn't too kind to jannetty or RDP... Check out some threads there if you want more info
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