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Author
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Topic: o2 sensor ?'s
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johnson50
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Member # 4608
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posted
 
 
i ran a diagnostic test and 41 and 91 came up. those two numbers are my o2 sensors. i changed the o2 sensors and again 41 and 91. and also my car runs like shit. has no power and exhaust pops when the throttle is mashed down. it hesitates and just plain runs like shit. ![[Mad]](mad.gif)
one more ?, if i have a o/r h pipe, should i get a check engine light from the o2 sensors because i have no cats or what? please help.
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2003 10th anniv. cobra
2.3l gen2 Whipple
AED Tuned
HP/TQ: too much!
Posts: 256 | From: fairfield/suisun | Registered: Jun 2004
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silverLX
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Member # 3207
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posted
The O/R H wont make it run different or throw a code. Sounds like your car has either too much or too little fuel pressure, or the timing is off.
Good luck!
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88LX hatch 410w
88LX vert gears, exhaust
95GT H/C/I
Posts: 1613 | From: Sonoma County | Registered: Aug 2003
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johnson50
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Member # 4608
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posted
nope, timing is good. don't know about the fuel system. if you turn the key to the on position but not start the car, should the fuel pressure stay up or should it bleed down. because my pressure bleeds down to 0 in about 10 seconds.
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2003 10th anniv. cobra
2.3l gen2 Whipple
AED Tuned
HP/TQ: too much!
Posts: 256 | From: fairfield/suisun | Registered: Jun 2004
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9cobra9
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Member # 4470
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posted
huh, i also have an o/r h without cats and have a check engine light on. i cant really notice a differance in the way the car is running but the light is on. would my aftermarket headers throw te code on or would mil's be good enough to take it out?
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Red 1999 Cobra #1227
cai, bbk headers, offroad h-pipe, short shifter, 3.73's, magnaflow mufflers, LTW flywheel and 04 cobra clutch,
co-owner of PWA
Posts: 1145 | From: Fremont | Registered: May 2004
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Jeff S
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Member # 371
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posted
Have you changed/added any parts recently? What does your fuel system consist of?
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'90 Mustang LX: 8.53 @ 157.92 w/ 1.33 60' on DR's
'10 ZR1: FOR SALE
'14 E63 S: RENNtech ECU
'04 Gallardo: UGR TTG
Posts: 2121 | From: San Jose, CA | Registered: Aug 2001
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94gt
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Member # 3060
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posted
quote:
Originally posted by 9cobra9:
huh, i also have an o/r h without cats and have a check engine light on. i cant really notice a differance in the way the car is running but the light is on. would my aftermarket headers throw te code on or would mil's be good enough to take it out?
do you have the MIL eliminators? those are mandatory on modulars when running any o/r mid pipe
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2020 Explorer ST
2011 Silver Raptor 'Screw
Posts: 5777 | From: Beavercreek, OH | Registered: Jul 2003
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johnson50
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Member # 4608
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posted
yes, i just swaped out a new 306 longblock. for a fuel system, i have 24 pound injectors, regulator, gauge, and 155 lph pump. the pump is new but i have a feeling it is bad.
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2003 10th anniv. cobra
2.3l gen2 Whipple
AED Tuned
HP/TQ: too much!
Posts: 256 | From: fairfield/suisun | Registered: Jun 2004
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04mustanggtkibby
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Member # 4202
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posted
I put my stock o2 sensors and tied the cords together on my Off road H. It wont run right if you dont got mil eliminators? I wans just going ti buy a programer. ![[burnout]](graemlins/burnout.gif)
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-Ford For Life-
Posts: 108 | From: Vacaville | Registered: Feb 2004
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