problem starting

Fastpitchdad · May 21st, 2007, 12:05 AM

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, 07:26 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, 07:44 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, 08:31 AM

what size injectors are you running?

ChrisJ · May 21st, 2007, 09:07 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, 10:19 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, 04:44 PM

whats your fuel pressure set at?

Fastpitchdad · May 21st, 2007, 09:04 PM

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

94GTD1SC · May 22nd, 2007, 01:31 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, 07:34 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, 09:44 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, 10:59 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, 09:00 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 21st, 2007, 12:05 AM	#1
Fastpitchdad Regular Join Date: Aug 2006 Posts: 131	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, 07:26 AM	#2
ChrisJ MuchCoolerThanGTsetGO 2002 Mustang GT SLOW Join Date: Jun 2006 Location: Shepherdsville, Kentucky Posts: 16,286	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... __________________ My Junk www.myspace.com/cjobe

May 21st, 2007, 09:07 AM	#5
ChrisJ MuchCoolerThanGTsetGO 2002 Mustang GT SLOW Join Date: Jun 2006 Location: Shepherdsville, Kentucky Posts: 16,286	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... __________________ My Junk www.myspace.com/cjobe

Threads Similar to: problem starting
Thread	Thread Starter	Forum	Replies	Last Post
Problem w/ Starting Car	Speedstang302	5.0 Mustangs	21	October 29th, 2007 10:48 AM
Problem starting up	sbx213	5.0 Mustangs	5	March 12th, 2007 12:46 AM
problem starting	mustangman0001	5.0 Mustangs	3	March 4th, 2007 02:52 PM
Starting Problem	97_4.6L_Stang	Modular Mustangs	5	January 23rd, 2007 11:01 PM
Car Starting Problem In My 03 GT	autostang03gt	99-04	3	November 13th, 2006 02:09 AM

Sponsored Links	Remove Advertisements
Forums at Modded Mustangs Advertisement

May 21st, 2007, 07:44 AM	#3
Fastpitchdad Regular Join Date: Aug 2006 Posts: 131	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, 08:31 AM	#4
TurboLX IT'S TURBO TIME 1990 Mustang LX Turbo 9.71@141.6 mph Join Date: Oct 2006 Location: NY Posts: 8,756	what size injectors are you running?

May 21st, 2007, 10:19 AM	#6
Fastpitchdad Regular Join Date: Aug 2006 Posts: 131	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, 04:44 PM	#7
TurboLX IT'S TURBO TIME 1990 Mustang LX Turbo 9.71@141.6 mph Join Date: Oct 2006 Location: NY Posts: 8,756	whats your fuel pressure set at?

May 21st, 2007, 09:04 PM	#8
Fastpitchdad Regular Join Date: Aug 2006 Posts: 131	it's set at 42 with the vacum line on,,

May 22nd, 2007, 01:31 AM	#9
94GTD1SC Newbie Join Date: Feb 2007 Posts: 23	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, 07:34 AM	#10
Fastpitchdad Regular Join Date: Aug 2006 Posts: 131	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, 09:44 AM	#11
94GTD1SC Newbie Join Date: Feb 2007 Posts: 23	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, 10:59 AM	#12
Fastpitchdad Regular Join Date: Aug 2006 Posts: 131	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.

All times are GMT -4. The time now is 07:45 PM.
Contact Us - Modded Mustangs - Top
Modded Mustangs is ©2005-2008, All Rights Reserved, And is Not Affiliated with Ford Motor Company. Forum is powered by vBulletin ©2000 - 2008, Jelsoft Ent. Ltd. & SEO by vBSEO 3.1.0 ©2007, Crawlability, Inc.

May 23rd, 2007, 09:00 AM	#13
Fastpitchdad Regular Join Date: Aug 2006 Posts: 131	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