Got Her Running, But wont stay running...help?

Speedstang302 · August 20th, 2007, 01:38 PM

hey guys..installed the cam and other valvetrain stuff..and after bout 2 days of messing with the timing, it turns out that i just had the firing order ontop of the distributor wrong...well i finally go it started this morning, and she revs real high to start and then wont idle, just dies out..im not so great w/ this EFI stuff so i may have missed something..i do know one thing is that i dont have a vaccum line going to the fuel pressure regulator..just cant fined the missing line or what going to that..i also have 2 vaccum lines that going under the backside of the upper intake? dont know if those lines are to the right spot..(should have marked them at tear down) and also on the front underside of the upper intake is 2 spots for more vaccum lines..i dont have any extras laying around..please tell me what im missing and what goes where...thanks alot to ALL responses...

AdderMk2 · August 20th, 2007, 01:51 PM

It sounds like you have a HUGE vac leak which is causing issues with your fuel metering. Stop at a store, like autozone or advance autoparts and buy a couple vaccum tree plugs. Cover up any unused vac ports, and if you have to, insert a T into one of your vac lines, then run it to your FPR

Speedstang302 · August 20th, 2007, 09:28 PM

well i have 2 unused vaccum ports open under neath front side of upper intake.. the to on the back..one goes to the FPR? and the other to the MAP? but what and where is the MAP? and then i have this thing that has 4 vaccum lines coming out of it..one goes on smog pump hose..and where do the rest go????

AdderMk2 · August 20th, 2007, 09:31 PM

you shouldnt have any vac lines attached to the BAP sensor (what your calling a map sensor)

and none of those ports should be open.. at all.. plug them

Speedstang302 · August 20th, 2007, 09:44 PM

well im going with a website that had diagrams of the vaccum lines location..said something bout a MAP..well im gunna just go by all new vaccum lines..that way i'll have all im missing and with be label w/ were from and were to..best bet..or just plug all open stuff and connect FPR to Upper intake vaccum port..

AdderMk2 · August 20th, 2007, 10:38 PM

you dont need to follow a stock diagram... just plug up all the ports, and run a vac line from the intake to the FPR

92_LX_5.0 · August 20th, 2007, 11:20 PM

i know a few cars that i have messed with, if you adjust the screw on the bottom of your throttle body, you can make it idle higher...probably not the answer you are looking for but with a cam it might be the only solution...not to discredit the vacuum issue either, because that can cause a problem as well

Speedstang302 · August 21st, 2007, 12:54 AM

Originally Posted by 92_LX_5.0

i know a few cars that i have messed with, if you adjust the screw on the bottom of your throttle body, you can make it idle higher...probably not the answer you are looking for but with a cam it might be the only solution...not to discredit the vacuum issue either, because that can cause a problem as well

i know how to adjust that idle..but i have a vaccum leak and have no fuel pressure..so it just stalls..its starts right up and stalls immediatly..unless i peddle it..but it revs to like 6000rpm's when i start it...and when i give it a slight amount of gas to stay running it revs right up to 6k...

fastford3388 · August 21st, 2007, 01:39 AM

yeah, definately don't run a vacuum line to the MAP. that really screwed up my air fuel mixture when mine was connected

Speedstang302 · August 21st, 2007, 01:44 AM

Originally Posted by fastford3388

yeah, definately don't run a vacuum line to the MAP. that really screwed up my air fuel mixture when mine was connected

to be honest i dont know what or where that it...it was just on this diagram...it told me to run a vaccum from 1 intake vaccum to MAP and 1 to the FPR..so basically i just need to block all vaccum ports and get a T and connect manifold vac port to FPR???

Jobra98 · August 28th, 2011, 06:58 PM

was it like this??

Jobra wont stay running...just happen 1 hr ago?

August 20th, 2007, 01:38 PM	#1
Speedstang302 I Post Entirely Way Too Much 1996 Mustang GT 13.64@101mph Join Date: Apr 2007 Location: Massachusetss Posts: 5,799 iTrader: 1 reviews	Got Her Running, But wont stay running...help? hey guys..installed the cam and other valvetrain stuff..and after bout 2 days of messing with the timing, it turns out that i just had the firing order ontop of the distributor wrong...well i finally go it started this morning, and she revs real high to start and then wont idle, just dies out..im not so great w/ this EFI stuff so i may have missed something..i do know one thing is that i dont have a vaccum line going to the fuel pressure regulator..just cant fined the missing line or what going to that..i also have 2 vaccum lines that going under the backside of the upper intake? dont know if those lines are to the right spot..(should have marked them at tear down) and also on the front underside of the upper intake is 2 spots for more vaccum lines..i dont have any extras laying around..please tell me what im missing and what goes where...thanks alot to ALL responses... __________________ 1990 GT- 5.0L \|BBK Shortys\|VRS O/R X\| SLP LM1 Catback\|BBK CAI\| Centerforce Clutch\|MGW Short Throw\| Alum D/S\| 3.73's\| Steeda Springs...about as stock as a 5.0 comes now a days..much more to come

August 20th, 2007, 01:51 PM	#2
AdderMk2 Banned Join Date: Aug 2007 Location: al-Ahhmadi, Kuwait Posts: 991 iTrader: 0 reviews	It sounds like you have a HUGE vac leak which is causing issues with your fuel metering. Stop at a store, like autozone or advance autoparts and buy a couple vaccum tree plugs. Cover up any unused vac ports, and if you have to, insert a T into one of your vac lines, then run it to your FPR __________________ [URL="http://providence.craigslist.org/cto/2148862880.html"]1994 Cobra For Sale[/URL] [SIGPIC][/SIGPIC] [QUOTE=Timm10221]Its only a 10 inch Tach that sits right in the center of the dash with LED lights and a Spinner bezel that has dimonds and gold plating.. And when you hit 4500 plus is sounds off (AAHHH SHITT) :cool:[/QUOTE]

August 20th, 2007, 09:28 PM	#3
Speedstang302 I Post Entirely Way Too Much 1996 Mustang GT 13.64@101mph Join Date: Apr 2007 Location: Massachusetss Posts: 5,799 iTrader: 1 reviews	well i have 2 unused vaccum ports open under neath front side of upper intake.. the to on the back..one goes to the FPR? and the other to the MAP? but what and where is the MAP? and then i have this thing that has 4 vaccum lines coming out of it..one goes on smog pump hose..and where do the rest go???? __________________ 1990 GT- 5.0L \|BBK Shortys\|VRS O/R X\| SLP LM1 Catback\|BBK CAI\| Centerforce Clutch\|MGW Short Throw\| Alum D/S\| 3.73's\| Steeda Springs...about as stock as a 5.0 comes now a days..much more to come

August 20th, 2007, 09:31 PM	#4
AdderMk2 Banned Join Date: Aug 2007 Location: al-Ahhmadi, Kuwait Posts: 991 iTrader: 0 reviews	you shouldnt have any vac lines attached to the BAP sensor (what your calling a map sensor) and none of those ports should be open.. at all.. plug them __________________ [URL="http://providence.craigslist.org/cto/2148862880.html"]1994 Cobra For Sale[/URL] [SIGPIC][/SIGPIC] [QUOTE=Timm10221]Its only a 10 inch Tach that sits right in the center of the dash with LED lights and a Spinner bezel that has dimonds and gold plating.. And when you hit 4500 plus is sounds off (AAHHH SHITT) :cool:[/QUOTE]

August 20th, 2007, 09:44 PM	#5
Speedstang302 I Post Entirely Way Too Much 1996 Mustang GT 13.64@101mph Join Date: Apr 2007 Location: Massachusetss Posts: 5,799 iTrader: 1 reviews	well im going with a website that had diagrams of the vaccum lines location..said something bout a MAP..well im gunna just go by all new vaccum lines..that way i'll have all im missing and with be label w/ were from and were to..best bet..or just plug all open stuff and connect FPR to Upper intake vaccum port.. __________________ 1990 GT- 5.0L \|BBK Shortys\|VRS O/R X\| SLP LM1 Catback\|BBK CAI\| Centerforce Clutch\|MGW Short Throw\| Alum D/S\| 3.73's\| Steeda Springs...about as stock as a 5.0 comes now a days..much more to come

August 20th, 2007, 10:38 PM	#6
AdderMk2 Banned Join Date: Aug 2007 Location: al-Ahhmadi, Kuwait Posts: 991 iTrader: 0 reviews	you dont need to follow a stock diagram... just plug up all the ports, and run a vac line from the intake to the FPR __________________ [URL="http://providence.craigslist.org/cto/2148862880.html"]1994 Cobra For Sale[/URL] [SIGPIC][/SIGPIC] [QUOTE=Timm10221]Its only a 10 inch Tach that sits right in the center of the dash with LED lights and a Spinner bezel that has dimonds and gold plating.. And when you hit 4500 plus is sounds off (AAHHH SHITT) :cool:[/QUOTE]

August 20th, 2007, 11:20 PM	#7
92_LX_5.0 Newbie Join Date: Jan 2007 Posts: 43 iTrader: 0 reviews	i know a few cars that i have messed with, if you adjust the screw on the bottom of your throttle body, you can make it idle higher...probably not the answer you are looking for but with a cam it might be the only solution...not to discredit the vacuum issue either, because that can cause a problem as well

August 21st, 2007, 01:39 AM	#9
fastford3388 Regular 1991 Mustang GT Join Date: Feb 2007 Location: Lisle, IL Posts: 367 iTrader: 0 reviews	yeah, definately don't run a vacuum line to the MAP. that really screwed up my air fuel mixture when mine was connected __________________ - '90 Mustang LX-Sold "Debbie" - '89 Mustang GT- Deceased "Lucy" - '91 Mustang GT-70,000 mi "The Unicorn"

August 28th, 2011, 06:58 PM	#11
Jobra98 95 5.0L COBRA 95 COBRA Join Date: Jul 2011 Location: Ridgeland, Mississippi Posts: 130 iTrader: 0 reviews	was it like this?? Jobra wont stay running...just happen 1 hr ago? __________________ Not All Who Wander Are Lost.

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