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94 gmc 1500 pick up O sensor


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dr.donut
User

May 30, 2019, 11:19 AM

Post #1 of 5 (272 views)
94 gmc 1500 pick up O sensor Sign In

Truck runs good but the O sensor blew out of the exhaust and I can't bring it to the muffler shop till tues. The sensor is tucked away in open air and I have a patch on the opening to keep it quite , will that cause any problems with air/fuel ratio ? Will it send a bad reading and run rich ? I bought the truck 8 years ago and it never had a catalytic converter , should it have one ? , always passed inspection but it's a friend and he really doesn't scrutinize too much .


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

May 30, 2019, 11:59 AM

Post #2 of 5 (265 views)
Re: 94 gmc 1500 pick up O sensor Sign In

A temp repair that should make it safe, AYOR. Look for Stainless Steel clamps like you might use for a hose. Marked on them "ss" usually but regular would do too short term. Make sure you can use two or three smaller ones end to end opening them up. Now just bent a coin as well as possible to match curve of pipe. Clamp tight right over that.
Tie wires and sensor if stuck away from anything with what works and can take some heat.
What you don't want it the super hot exhaust air blowing at who knows what and ruin it never mind the obnoxious noise that is HOT as it gets blowing out so stop that.
A good shop will fix or made a patch (1994??!!) over the hole with a threaded hole just right and make it work again for a sensor.
I really don't know how much that has to do with fuel delivery like OBDII vs a warning it isn't right and set a CEL to warn your that you are wrecking converter. Truck just has to be running well enough shouldn't make too much extra damage - the open hole would or could.
> Multiple clamps is so as it tightens you can still find one to tighten should be 8mm or 5/16th is the same use a socket.
Hope for the patch as taking the pipe off is near hopeless to save much right on to manifold an OMG that's too much work thing to do,


Tom



Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

May 30, 2019, 12:38 PM

Post #3 of 5 (252 views)
Re: 94 gmc 1500 pick up O sensor Sign In

Of course it will effect the air/fuel ratio. That is the sensors job to read fuel mixture in the exhaust.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



dr.donut
User

Jun 5, 2019, 11:10 AM

Post #4 of 5 (203 views)
Re: 94 gmc 1500 pick up O sensor Sign In

They cut out the small section and put in a new sleeve for the new sensor after the wrong one was delivered to them . They got the right sensor the next day . Service engine would come up when it got good and warm and would go away . Good to go now . Exhaust work is something I just don't get into anymore , an independent shop can do it for a good price .


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jun 5, 2019, 11:31 AM

Post #5 of 5 (200 views)
Re: 94 gmc 1500 pick up O sensor Sign In

Nobody does exhaust work any more. Custom shops do it better and cheaper.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.







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