problem starting

Fastpitchdad · May 20th, 2007, 11:05 PM

Hi,,

i just finished my motor and sc install,the car will only start if i hold the pedal to the floor,,then it starts and idles fine.couple ?'s what would be a
good starting point for fuel pressure and base timing,also wht should the wideband read at idle,,

thanks

steve

ChrisJ · May 21st, 2007, 06:26 AM

At idle I see it boune 14.7 - 15.4...

Hows your fuel pump? Your fuel regulator?My fuel pressure at idle sits right around 40...But I have a mod engine so mine is prolly different...

Fastpitchdad · May 21st, 2007, 06:44 AM

hey ,,

fuel pump in tank is a 255 walpro(new) new t-rex pump
fuel pressure is around 40-41 at idle
at idle i bounce from 14.9 - 15.9

regulator is new also aeromotive

TurboLX · May 21st, 2007, 07:31 AM

what size injectors are you running?

ChrisJ · May 21st, 2007, 08:07 AM

Do you turn the key foward and let the fuel pressure get to the right level before you start it?

Try that and see if it works then...

Fastpitchdad · May 21st, 2007, 09:19 AM

i'm running 42#'s,yea,,i turn the key and wait a second for the wideband to cycle and the fuel pressure come up,i'm gonna check the tps and iac(which is new),,

heres a pic of the motor

TurboLX · May 21st, 2007, 03:44 PM

whats your fuel pressure set at?

Fastpitchdad · May 21st, 2007, 08:04 PM

it's set at 42 with the vacum line on,,

94GTD1SC · May 22nd, 2007, 12:31 AM

Is that an FMU on the passenger side? If so, you shouldn't need it if you run 42's. I run the stock FPR with 42's, ditched the FMU and have 32 lbs of fuel pressure at idle.

Fastpitchdad · May 22nd, 2007, 06:34 AM

ok,,,,i'll try that,i'm new to the whole sc'd scene.is the 32#'s of fuel pressure be set with the vac line on or off the regulator.also. could the 42's set at 40#'s with the fmu be causing the hard start,

thanks

94GTD1SC · May 22nd, 2007, 08:44 AM

Keep the vacuum line on the FPR so it will work the way it was intended. Stock FPR's are 1:1 boost referenced so it will raise fuel pressure with boost as needed. Has your car been to a tuner since you sut the SC and 42's on it?

Fastpitchdad · May 22nd, 2007, 09:59 AM

no..the car hasnt been to be tuned,,i just finished installing the new motor and sc.i have a aeromotive fpr also not the stock fpr.

Fastpitchdad · May 23rd, 2007, 08:00 AM

hi..

well,,ran the car last nite again,,talked to a friend who does tuning.
the cars going in a week from this sat to be dyno tuned and a custom chip burned.

200 for the tune 300 for the chip,does that sound right

May 20th, 2007, 11:05 PM	#1
Fastpitchdad Regular Join Date: Aug 2006 Posts: 131 iTrader: 0 reviews	problem starting Hi,, i just finished my motor and sc install,the car will only start if i hold the pedal to the floor,,then it starts and idles fine.couple ?'s what would be a good starting point for fuel pressure and base timing,also wht should the wideband read at idle,, thanks steve

May 21st, 2007, 06:26 AM	#2
ChrisJ RLY SRS Join Date: Aug 2005 Location: Ft. Meade, MD Posts: 38,220 Blog Entries: 4 iTrader: 10 reviews	At idle I see it boune 14.7 - 15.4... Hows your fuel pump? Your fuel regulator?My fuel pressure at idle sits right around 40...But I have a mod engine so mine is prolly different... __________________ 2008 Acura TL Type-S - 2008 EB Ford Expedition - 2002 Boosted GT - Sold Facebook Google+

May 21st, 2007, 07:31 AM	#4
TurboLX I Post Entirely Way Too Much 1988 Mustang LX Turbo Join Date: Oct 2006 Location: NY Posts: 8,778 Blog Entries: 1 iTrader: 0 reviews	what size injectors are you running? __________________ 1988 LX Coupe 2.5L, GT35R, 44mm WG, 32psi, C16.

May 21st, 2007, 08:07 AM	#5
ChrisJ RLY SRS Join Date: Aug 2005 Location: Ft. Meade, MD Posts: 38,220 Blog Entries: 4 iTrader: 10 reviews	Do you turn the key foward and let the fuel pressure get to the right level before you start it? Try that and see if it works then... __________________ 2008 Acura TL Type-S - 2008 EB Ford Expedition - 2002 Boosted GT - Sold Facebook Google+

May 21st, 2007, 03:44 PM	#7
TurboLX I Post Entirely Way Too Much 1988 Mustang LX Turbo Join Date: Oct 2006 Location: NY Posts: 8,778 Blog Entries: 1 iTrader: 0 reviews	whats your fuel pressure set at? __________________ 1988 LX Coupe 2.5L, GT35R, 44mm WG, 32psi, C16.

May 21st, 2007, 06:44 AM	#3
Fastpitchdad Regular Join Date: Aug 2006 Posts: 131 iTrader: 0 reviews	hey ,, fuel pump in tank is a 255 walpro(new) new t-rex pump fuel pressure is around 40-41 at idle at idle i bounce from 14.9 - 15.9 regulator is new also aeromotive

May 21st, 2007, 09:19 AM	#6
Fastpitchdad Regular Join Date: Aug 2006 Posts: 131 iTrader: 0 reviews	i'm running 42#'s,yea,,i turn the key and wait a second for the wideband to cycle and the fuel pressure come up,i'm gonna check the tps and iac(which is new),, heres a pic of the motor

May 21st, 2007, 08:04 PM	#8
Fastpitchdad Regular Join Date: Aug 2006 Posts: 131 iTrader: 0 reviews	it's set at 42 with the vacum line on,,

May 22nd, 2007, 12:31 AM	#9
94GTD1SC Newbie Join Date: Feb 2007 Posts: 23 iTrader: 0 reviews	Is that an FMU on the passenger side? If so, you shouldn't need it if you run 42's. I run the stock FPR with 42's, ditched the FMU and have 32 lbs of fuel pressure at idle.

May 22nd, 2007, 06:34 AM	#10
Fastpitchdad Regular Join Date: Aug 2006 Posts: 131 iTrader: 0 reviews	ok,,,,i'll try that,i'm new to the whole sc'd scene.is the 32#'s of fuel pressure be set with the vac line on or off the regulator.also. could the 42's set at 40#'s with the fmu be causing the hard start, thanks

May 22nd, 2007, 08:44 AM	#11
94GTD1SC Newbie Join Date: Feb 2007 Posts: 23 iTrader: 0 reviews	Keep the vacuum line on the FPR so it will work the way it was intended. Stock FPR's are 1:1 boost referenced so it will raise fuel pressure with boost as needed. Has your car been to a tuner since you sut the SC and 42's on it?

May 22nd, 2007, 09:59 AM	#12
Fastpitchdad Regular Join Date: Aug 2006 Posts: 131 iTrader: 0 reviews	no..the car hasnt been to be tuned,,i just finished installing the new motor and sc.i have a aeromotive fpr also not the stock fpr.

May 23rd, 2007, 08:00 AM	#13
Fastpitchdad Regular Join Date: Aug 2006 Posts: 131 iTrader: 0 reviews	hi.. well,,ran the car last nite again,,talked to a friend who does tuning. the cars going in a week from this sat to be dyno tuned and a custom chip burned. 200 for the tune 300 for the chip,does that sound right

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