94 z heads,cam,forged pistions gss340 walbro 255
125 shot first and second pull hard then at 3rd car falls on its face i checked all fittings and did a test shot with both fittings off to make sure it was spraying both fuel and nos and used a differant bottle
the only thing i can think of is that the cpu
in the car is reading to lean through the o2sensor and dumping a ton of fuel ?
now i do have tr55 in the car ...wtf i did it last year the whole summer and no prob
the only thing differant this year is a ported intake to match the heads ,,,maybe pulling vaccume up top with stock throttle body?????????

any help
thank you jeff

 

i'm a new to NX nos but, you have a bottle warmner?

 

no ..but the bottle had 1000psi

 

Have you checked to make sure your fuel pressure is not dropping?

 

yes ...it held at about 45psi


after i get this fixed and the plugs changed
i want to hit with 200 shot

 

You don't have enough fuel.

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SSMOKEM

1995 Impala SS "Cherry Bomb"
Best ETs: faster than my '65 pickup
Mods: 93% stock

My Super Impala SS Website

 

Had the same problem last weekend, but in all gears. No cause found yet. Going to change plugs (even though they looked fine) and check nitrous filter. Fuel pressure was good. N2O pressure was also good. Ran fine naturally aspirated too. Best ever actually. So any other ideas anybody?

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1995 383 Z28, black, M6, ARE heads, CC306, Crane 1.6 Gold, K&N Cold Air, 58mm TB, 30# injectors, LT1 Edit, SLP headers, 4" Mufflex, Spec Stage 4 Ceramic, SLP sfc, BMR Xtreme Duty TA and adjustable LCA's, stb, phb, Moser 9"(3.89,soft-locker), Nitrous Works, some Mickey T's on a set of Weld Pro-Stars, Harwood Cowl Hood, 98-up SS Spoiler.

 

bet its your FPSS, do you have it wired to cut the n20 noid off only? Could be shutting the n20 off and not the fuel which would make it waaaay fat. Test your FPSS, bet thats the prob. IMO

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96Z M6, 12 bolt Moser(3.73),NX wet kit(all the goodies),MSD 6AL,tayor spiro-pro,NGK tr-6,Star stage 2 kevlar,pcmforless programing, SLP CAI,!maf,LT4 NM,Flowmaster,Hurst roll control,BFG DR's,Pro 5.0,BMR DS loop...
13.52-103.8 mph
60ft. 1.99
no n2o times yet

 

well i put tr6's in and put a 150 shot in her and now its worse ,,,now it was jumping ,then falling over this time my fuel was all over the place jumping up and down
i just put in a walbro 255gss340 ...
the car runs great on motor but when i hit the hose it falls

 

after thinking and talking with some of detroit's finest
for some reason the fuel pump .is bad .not hooked up right ,,,maybe,,or just a pile of poop i hate my car

 

HOLD UP! I just read a thread on one of my vette forums and somone just had a prob with the solenoid opening then slowly closing down after time. I would check that first or borrow another solenoid before ya dropped the cash on a fuel pump. Hope this helps.

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94 Z28 M6 [R.I.P.] ( stupid stupid snowplow)
97 Corvette. MN6. All the goodies.
00 ZR600EFI Arctic Cat

 

i put the stock pump back in and sprayed the car and at the top of second begining of third the fuel pressure droped from 42to 20 psi under full load

what to do .............aghhhhhhhhhhhhhhhh

 

come on guys i still need help!!!!!!!!!!!!
help
help
help
.................ttt

 

I had the same problem, but only when the bottle was fresh, totally full...I think it had air in it or somthing (I purged it) after about 5 times trying to spray it, It ran fine on the juice...this has happened twice now.

Also, check to be sure both solenoids are opening, not just the fuel...this has also happened to me (bad connection)

Good luck,
-Scooba

 

the pressure of the bottle will not affect the fuel pressure droping to 20 psi
i have a fuel supply problem .
or a electric problem.... a short