1994 Chevy Truck sensors

Tiny
CDOWD
  • MEMBER
  • 1994 CHEVROLET TRUCK
  • V8
  • 4WD
  • AUTOMATIC
  • 120,000 MILES
My truck is running real bad I put new plugs wires and it still is running real bad now I no I dont have any oxagen sensors but it has never ran this bad before so what should I check and will it hurt it if it dont have a oxagen filter now I have it straight piped with no mufflers or catalytic converters
Thursday, April 9th, 2009 AT 9:26 AM

16 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check the fuel pressure and comeback with it we start here.
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Thursday, April 9th, 2009 AT 9:31 AM
Tiny
CDOWD
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  • 25 POSTS
Its good so what now
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Thursday, April 9th, 2009 AT 12:12 PM
Tiny
RASMATAZ
  • MECHANIC
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Scan the computer for code/s and then comeback.

BTW what was the fuel pressure reading?
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Thursday, April 9th, 2009 AT 5:46 PM
Tiny
CDOWD
  • MEMBER
  • 25 POSTS
60 psi
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Thursday, April 9th, 2009 AT 8:45 PM
Tiny
CDOWD
  • MEMBER
  • 25 POSTS
Ok do I have to have a oxagen sensor
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Thursday, April 9th, 2009 AT 8:47 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Yes sir-you need the oxygen sensor its job is to control fuel demand during closed loop operation.
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Thursday, April 9th, 2009 AT 9:34 PM
Tiny
CDOWD
  • MEMBER
  • 25 POSTS
Thanks so I need to hook one up but all I got is straight pipes no mufflers or cats so what do I do drill a hole and hook one up? Would this make my truck run real bad by not haveing one? Thanks for your help
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Thursday, April 9th, 2009 AT 10:11 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
My truck is running real bad-what do you meant by this-rough idle or what-
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Thursday, April 9th, 2009 AT 11:45 PM
Tiny
DCS1998
  • MEMBER
  • 41 POSTS
Rasmataz:
This cat has been starting new threads asking the same old question about his 1994 truck. He dont seem to listen to what people tell him to check!

I have read ALOT of your replys to people, and have found you to be very good at being able to troubleshoot via the internet.

There is just something about this guy that makes me wanna sit down, smoke a cigarette, drink a beer, watch a chick flick then blow my brains out with a.40 caliber!

*btw cdowd. Its OXYGEN, but I will ALLOW you to call it O2
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Friday, April 10th, 2009 AT 12:12 AM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
DCS1998 I appreciate your confidence in me. If people will listen to us they might end up learning something instead at times they try to educate us with something we've arleady learned thru experiences and certifying the ASE. In this particular case anything can cause a bad running engine-such as compression/fuel/ ignition problems etc
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Friday, April 10th, 2009 AT 1:05 AM
Tiny
CDOWD
  • MEMBER
  • 25 POSTS
No it runs good at idel. It just spit and spuders real bad when you drive it.
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Friday, April 10th, 2009 AT 6:46 AM
Tiny
RASMATAZ
  • MECHANIC
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Check the throttle position/manifold absolute pressure and knock sensors-
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Friday, April 10th, 2009 AT 7:25 AM
Tiny
CDOWD
  • MEMBER
  • 25 POSTS
Hey thanks so much its the oxgen sensor I did a test and it gave me a code the code was 13 which in the maual code 13 says oxagen sensor but I have on last? Ok I can not find were to hook the oxagen sensor up at because some one took it out so ther for I cant find the wire to plug the o2 sensor in at
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Saturday, April 11th, 2009 AT 8:18 AM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Heres the wires that goes to the O2 sensor-see below


https://www.2carpros.com/forum/automotive_pictures/12900_O2_wire_colors_1.jpg

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Saturday, April 11th, 2009 AT 9:25 AM
Tiny
CDOWD
  • MEMBER
  • 25 POSTS
Ok but my? Is what if I dont have them wires. Becase someone took them off and I dont have cats the y pipe has been cut off.
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Saturday, April 11th, 2009 AT 10:28 AM
Tiny
RASMATAZ
  • MECHANIC
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You need to do something about it-I've given all I got-you need to get a repair/service manual and track the wires.
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Saturday, April 11th, 2009 AT 5:20 PM

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