Fueling & Injection Fuel Pumps | Injectors | Rails | Regulators | Tanks

Guys in need help bad

Old 07-22-2013, 05:43 AM
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OK, History went to Milan 5 weeks ago, My car runs 11.70-1180 1st run 11.85 thats cool then 1290 then 139 then 14.9 then 15.9. So I went and got a wideband and a new Grannitilli MAP 83mm one so I do a run last night again at
Milan and again 13.85 at 99MPH 1.99 60foot and use to get 1.60 I launch at 3500 and it hooks well then it falls it it face badly. I dotice my fuelpump is at 60psi but going threw the gears it goes to 50psi. It never did that and in half a day my fuel pressure drops to 0psi and it use to stay at 45psi for weeks. Do I have a fuel pump problem. And itd a 6speed stage 3 H/C loon tube headers EVERYTHING my wideband is at 13.0 under full throdle Livernois tuned it and i just bought the HP tuner because i am so ****** lost I am ready to jump a bridge. Please help me I have a big race in Aug2-3. Thanks for reading guys Thank you Ken.
Old 07-22-2013, 09:06 AM
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13.0 is too lean. check fuel pump voltage, check fuel pump, check wiring.
Old 07-22-2013, 09:41 AM
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thanks
Old 07-22-2013, 12:33 PM
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Tell us more about your set-up. Fbody I would assume? Without knowing much it sounds like a pump, but could be a line leaking ever so slightly.

Devil is in the details.

D
Old 07-22-2013, 07:20 PM
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Found out why my car ran ****. Found out you do not run race gas with cats. The cats were all melted and jammed in my y pipe. So I just want people to know that race gas is a NO NO.
Old 07-22-2013, 09:32 PM
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i'm betting the cat temp protect portion of your tune was off. never heard/seen that before, but I don't have cats.
Old 07-23-2013, 12:38 AM
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How many miles in the cats? You went 11.70 with factory cats?
Old 07-23-2013, 07:37 AM
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kook cats with y pipe and about 1000 Miles.


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