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#1
12-10-2007, 08:45 AM
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Won't start without starting fluid?
Hey guys, I've been fighting with my buddy's 90 gsx for a while now... we've finally gotten it started, but it seems it'll only start when you use starting fluid. Do you guys have any idea why this may be? Thanks in advance.
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1990 GSX PTE SC6152e, tubular manifold, FIC 650's, wiseco/eagle internals, dsmlink, TRE tranny, Apexi dp and cat-back, Apexi EGT and Boost Gauges and Turbo Timer, Megan Racing FPR, Walboro 255 Pump and much more to come. 
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#2
12-10-2007, 10:05 AM
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Re: Won't start without starting fluid?
Sounds like not enough fuel is getting there. Any leaks in the fuel lines? FP ok? Fuel Filter old?
__________________
2013 Chevy Sonic 1LZ Daily Driver, 1.4L Turbo, 6spd 75 Monte Carlo SBC 400 6.6L, Aluminum heads, Hurricane Intake... 12 Chevy Sonic 1LZ 1.8L - Traded 01 Pontiac Grand Am SE - RIP 95 Eagle Talon ESi-T 5spd - RIP 88 Oldsmobile Cutlass Ciera- RIP
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#3
12-10-2007, 01:05 PM
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Re: Won't start without starting fluid?
I don't know of any leaks... the fuel pump is supposed to be a newer walboro pump, but I haven't checked it out. There is a fuel pressure gauge... what should it be reading?
__________________
1990 GSX PTE SC6152e, tubular manifold, FIC 650's, wiseco/eagle internals, dsmlink, TRE tranny, Apexi dp and cat-back, Apexi EGT and Boost Gauges and Turbo Timer, Megan Racing FPR, Walboro 255 Pump and much more to come.
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#5
12-10-2007, 01:21 PM
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Re: Won't start without starting fluid?
You gauge should be reading about 42psi I think.
__________________
98 Eclipse GS Turbo Megasquirt 2 - Holset HY35 Turbo - Built motor - P&P Head and Intake - 3" Turbo back - FMIC - Greddy RZ BOV - Walbro 255 - Aeromotive AFPR - 650cc Injectors - Fidanza Flywheel - Zoom clutch - 13" Cobra Front Brakes - AEM WB - Devilsown meth injection - 3.55 Final Drive gear ratio 1981 Chevy Scottsdale 1987 Nissan 300zx - Chump Car 2001 BMW 325i - DD
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#6
12-10-2007, 01:47 PM
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Re: Won't start without starting fluid?
42psi is stock fuel pressure. When I installed my gauge, I had a leak. When the car sat overnight, it would drain the fuel lines from the filter to the rail, causing a hard start up, which sounds like you have. BUT, if it doesn't start at all, sounds like it's deeper. Find the pressure sensor and check for leaks. The Fuel pump may also not have been installed properly
__________________
2013 Chevy Sonic 1LZ Daily Driver, 1.4L Turbo, 6spd 75 Monte Carlo SBC 400 6.6L, Aluminum heads, Hurricane Intake... 12 Chevy Sonic 1LZ 1.8L - Traded 01 Pontiac Grand Am SE - RIP 95 Eagle Talon ESi-T 5spd - RIP 88 Oldsmobile Cutlass Ciera- RIP
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#7
12-10-2007, 02:05 PM
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Re: Won't start without starting fluid?
Fuel pressure should be 36-38 at idle. If the pressure drops slowly after you turn off the engine, you've got a leaky injector or a leak somewhere else. If it drops immediately after turn off, the fuel pump is bad. When was the last time the car was tuned up?
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95 Talon TSI AWD 97 Eclipse GST 
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#8
12-10-2007, 02:12 PM
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Re: Won't start without starting fluid?
As soon as my pump turns off the pressure drop pretty quick. I think I remember hearing that the walbro pumps dont have a check valve or something to hold the pressure like the stock pump does. And Im positive I have no leaks
__________________
98 Eclipse GS Turbo Megasquirt 2 - Holset HY35 Turbo - Built motor - P&P Head and Intake - 3" Turbo back - FMIC - Greddy RZ BOV - Walbro 255 - Aeromotive AFPR - 650cc Injectors - Fidanza Flywheel - Zoom clutch - 13" Cobra Front Brakes - AEM WB - Devilsown meth injection - 3.55 Final Drive gear ratio 1981 Chevy Scottsdale 1987 Nissan 300zx - Chump Car 2001 BMW 325i - DD
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#9
12-10-2007, 02:25 PM
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Re: Won't start without starting fluid?
Since when was it 36-38? Mine sits at 42.
Oh, GSX. Got ya.
__________________
2013 Chevy Sonic 1LZ Daily Driver, 1.4L Turbo, 6spd 75 Monte Carlo SBC 400 6.6L, Aluminum heads, Hurricane Intake... 12 Chevy Sonic 1LZ 1.8L - Traded 01 Pontiac Grand Am SE - RIP 95 Eagle Talon ESi-T 5spd - RIP 88 Oldsmobile Cutlass Ciera- RIP
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#10
12-10-2007, 02:43 PM
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Re: Won't start without starting fluid?
420a is 42psi, 4g63T is 36-38.
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95 Talon TSI AWD 97 Eclipse GST
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#11
12-10-2007, 03:11 PM
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Re: Won't start without starting fluid?
techniacally...
95 420a - Has an adjustable fpr, 42psi full vac. 48-50psi 0 vac. 96+ 420a - 48psi
__________________
98 Eclipse GS Turbo Megasquirt 2 - Holset HY35 Turbo - Built motor - P&P Head and Intake - 3" Turbo back - FMIC - Greddy RZ BOV - Walbro 255 - Aeromotive AFPR - 650cc Injectors - Fidanza Flywheel - Zoom clutch - 13" Cobra Front Brakes - AEM WB - Devilsown meth injection - 3.55 Final Drive gear ratio 1981 Chevy Scottsdale 1987 Nissan 300zx - Chump Car 2001 BMW 325i - DD
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#12
12-10-2007, 06:52 PM
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Re: Won't start without starting fluid?
There are a couple of things that it could be.
1.Fuel pump is losing prime(odd for it being new) 2.Fuel Filter is stopped up and wont allow gas through 3.Not getting proper spark so check the plugs and wires<<I have had this prob before) Any check engine lights btw?
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#13
12-15-2007, 10:16 AM
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Re: Won't start without starting fluid?
Okay guys... I swapped out fuel pumps with another that I knew worked... and we primed it up and got it to run, and after sitting overnight, the fpr gauge is now reading zero... So I'm guessing that I am losing fuel somewhere. There are no visible leaks, I'm trying to think of where I may be leaking. Would a bad injector ring cause this problem? Thanks for all the help again!
__________________
1990 GSX PTE SC6152e, tubular manifold, FIC 650's, wiseco/eagle internals, dsmlink, TRE tranny, Apexi dp and cat-back, Apexi EGT and Boost Gauges and Turbo Timer, Megan Racing FPR, Walboro 255 Pump and much more to come.
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#14
12-15-2007, 10:23 AM
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Re: Won't start without starting fluid?
Your not going to hold fuel pressure over night. My car will sit for 5 min and lose all the fuel pressure. The fuel pump should cut on as soon as you turn the key and it only takes it a second to prime. You may still have a leak though if your having trouble starting the car.
A bad injector o ring wont loose your prime bc the injectors will be closed. It will leak fuel all over your motor. No good
__________________
98 Eclipse GS Turbo Megasquirt 2 - Holset HY35 Turbo - Built motor - P&P Head and Intake - 3" Turbo back - FMIC - Greddy RZ BOV - Walbro 255 - Aeromotive AFPR - 650cc Injectors - Fidanza Flywheel - Zoom clutch - 13" Cobra Front Brakes - AEM WB - Devilsown meth injection - 3.55 Final Drive gear ratio 1981 Chevy Scottsdale 1987 Nissan 300zx - Chump Car 2001 BMW 325i - DD
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#15
12-15-2007, 10:57 AM
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Re: Won't start without starting fluid?
Hmm, I was under the impression that the fuel line was always pressurized... the fuel pump won't turn on unless the ignition is on and your cranking the motor, so you always have to start dry like that?
__________________
1990 GSX PTE SC6152e, tubular manifold, FIC 650's, wiseco/eagle internals, dsmlink, TRE tranny, Apexi dp and cat-back, Apexi EGT and Boost Gauges and Turbo Timer, Megan Racing FPR, Walboro 255 Pump and much more to come.
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