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Author
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Topic: Stumped!
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RedLned
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Member # 4746
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posted
 
 
Hey All, i'm new to caFords so thanks for having me....so here is my problem....october 2003 i ran a 13.9@98.09 at firebird raceway FFW. At that time, I had stock good year tires, MAC cold air, flowmaster mufflers, tri-axe, and steeda underdrive pullies.. I had put the pullies on about a week before. intake was on for at least 5 months. On the way back from arizona, my check engine light came on. after a few days it turned off but i took it to ford anyway. They said there was no code entered in the system. To date, i have added frpp 3.73, BFG Gforce KD 255/40-17, My current runs at infineon have been in the 14.3 range with consistant 2.00sec 60ft. When i drive aggresivly the check engine light seems to come on, my friend told me it might be the intake? Also, i hear a faint whistle from under the car....i'm pretty sure I have an exhaust leak as well. ![[Confused]](confused.gif) If anyone can help that would be great, I really have no idea why i'm running so slow. Thanks! 2003 Gt 5speed ::Mac Lowering Springs, Mac CAI, Steeda Underdrive pullies, Steeda Tri-Axe, Flowmaster Mufflers, Bfg Gforce KD 255/40-17
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Brad
03 Gt Prem. Redfire 5spd
13.90@98.09mph 2.00 60ft
Posts: 20 | From: Bay Area | Registered: Aug 2004
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THE PUNISHER
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Member # 4333
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posted
you have a vacuum leak somewhere on the intake manifold. That is causing you the power loss.
Posts: 382 | From: San Jose | Registered: Mar 2004
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RedLned
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Member # 4746
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posted
easily fixed?
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Brad
03 Gt Prem. Redfire 5spd
13.90@98.09mph 2.00 60ft
Posts: 20 | From: Bay Area | Registered: Aug 2004
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BlackNGold
CaliforniaFords.com
Moderator
Member # 655
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posted
First off I would judge the cars performance more on trap speeds rather than ET's...Trap speeds reflect the cars power more...
Your friend could be right on the intake effecting your computer...Try switching your intake back to stock at the track and see if it makes a difference....
Good luck... ![[patriot]](graemlins/patriot.gif)
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-SLOWER TRAFFIC KEEP RIGHT-
Posts: 5132 | From: Bay Area, CA | Registered: Dec 2001
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88DroptopGT
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Member # 2535
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posted
If it is a vacuum leak, then it is easily fixed. You either re-connect the line that is loose or replace it with some similiar sized tubing from Vatozone or Kragen.
Posts: 3978 | From: 707 | Registered: Mar 2003
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RedLned
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Member # 4746
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posted
Alright thanks, I installed my intake about 5 months before the light came on, so i'm hesitant about that. Is there a possibility of cracked manifold?
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Brad
03 Gt Prem. Redfire 5spd
13.90@98.09mph 2.00 60ft
Posts: 20 | From: Bay Area | Registered: Aug 2004
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94gt
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Member # 3060
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posted
Check around for cracked vaccum lines, I found 3 partially cracked ones when I saw one that was a clean break oneday... an ounce of prevention can save a lot of headache ![[Smile]](smile.gif)
also, if noone else has said it, welcome to the board
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2020 Explorer ST
2011 Silver Raptor 'Screw
Posts: 5777 | From: Beavercreek, OH | Registered: Jul 2003
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RedLned
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Member # 4746
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posted
Thanks man, glad to be here. Well some peices of the intake were loose so i'll check that out. Going to infineon next weds so ill test it out. Thanks again!
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Brad
03 Gt Prem. Redfire 5spd
13.90@98.09mph 2.00 60ft
Posts: 20 | From: Bay Area | Registered: Aug 2004
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RedLned
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Member # 4746
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posted
So i bought a code scanner at kragens today and pulled my check engine light code. "cylinder 4 misfire" What could cause that? Spark Plug? Running Rich? Thanks guys
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Brad
03 Gt Prem. Redfire 5spd
13.90@98.09mph 2.00 60ft
Posts: 20 | From: Bay Area | Registered: Aug 2004
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THE PUNISHER
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Member # 4333
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posted
cap, rotor, or wires might be out.
-David
Posts: 382 | From: San Jose | Registered: Mar 2004
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66 AC COBRA
Nitrous King
Member # 904
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posted
quote:
Originally posted by The Punisher:
cap, rotor, or wires might be out.
-David
i think the cap and rotor isnt the problem ![[Razz]](tongue.gif) , on a 4.6gt ![[Big Grin]](biggrin.gif)
but yeah i would change all the spark plugs and them make sure all the wires are pushed on all the way, they probably need to be changed anyway
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FFR AC Cobra
72 Vega - WCHRA Extreme 10.5
Posts: 6280 | From: Winters | Registered: Feb 2002
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MrMagooo
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Member # 2542
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posted
hey if u figure it out tell me i keep throwing up number and number 7 misfire code and can't figure it out. i change the coils from #1 to 4 and #5 to 7 and still have the problem, then changeed the spark plugs and still have the rpoblem, so i went as far as changing the injectors and still the problem, i was also told a vacuum leak but haven't found one yet but am still looking
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99 Laser Red GT
02 954 RR
Posts: 17 | From: Williams | Registered: Mar 2003
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RedLned
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Member # 4746
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posted
i found a crack on my mas so im sealing that up, maybe thats the vacume leak...what mods have you done to your car?
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Brad
03 Gt Prem. Redfire 5spd
13.90@98.09mph 2.00 60ft
Posts: 20 | From: Bay Area | Registered: Aug 2004
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MrMagooo
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Member # 2542
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posted
cold air, 75mil throtle body, bssini x pipe with cat,flows,c&l upper plenum,short throw,clutch quadrent, adjustable cable and fire wall adjuster, 3.55 gears with ta cover,diablo chip which has never worked need to have it retuned,the rest has been in body stiffening and suspension everythings been on for awhile didn't thorw codes until month or so ago
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99 Laser Red GT
02 954 RR
Posts: 17 | From: Williams | Registered: Mar 2003
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