Help!!!!!!
Postmaster
Joined: Aug 2005
Posts: 4,728
Likes: 8
From: Cleveland, TN
Here is a VERY good write up on checking for DTC codes.. Fuel Injection Technical Library » How To Run a Self-Test
Mountain Pass
Joined: Jan 2014
Posts: 214
Likes: 37
From: Madison Ohio
Its a 93. A $20 code reader is not going to say it needs a tuneup, IF the o2's are working its not going to flag with a code. The fact there working does not mean there reading correct. a 93 OBDI will NOT test the o2's like a newer system will do. Unless he has a check engine light on the code reader is not going to tell much.
Tuned
Joined: Oct 2012
Posts: 440
Likes: 8
There are codes that won't throw the CEL. I work in the automotive field and I see this all the time. Dumping the codes on an electronically controlled engine should ALWAYS be the first thing you should do whether or not you have a CEL currently on.
Senior User
Joined: Oct 2013
Posts: 411
Likes: 0
Or we should ask ohiofordfarm for some $$$ he clearly has extra to just start replacing things and throwing money without using logic.
My father in law has been a mechanic for over 30 years and the FIRST thing he does is check for codes not just doing $100 tune ups and $20 each o2 sensors. Just saying the $20 code reader is that cheap BECAUSE its a 93.... NOT because its not effective
My father in law has been a mechanic for over 30 years and the FIRST thing he does is check for codes not just doing $100 tune ups and $20 each o2 sensors. Just saying the $20 code reader is that cheap BECAUSE its a 93.... NOT because its not effective
Junior User
Joined: Jan 2014
Posts: 86
Likes: 0
From: The Golden State
Evan, does your truck have a manual or automatic trans? And what axle code appears on your door tag?
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New User
Joined: Jan 2014
Posts: 11
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My transmission is automatic. As for the rear end. I know that the gears were replaced. I want to say a 3.73 but I could be thinking of something else.
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New User
Joined: Jan 2014
Posts: 11
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Alright Evan, please do this.
Find this:
Pop the hood, its right in front of the drivers seat. On the inside of the fender, right near the brake fluid reservoir. They might be hiding under a cover that says DIAGNOSTIC PORT.
Connect it this way:
Just use a piece of scrap wire or even a paper clip.
Grab a piece of paper, or what I like to do is put my phone into video camera mode and film it. Hop in the drivers seat, turn the key to run but don't start your truck. Watch the check engine light, it will start flashing. Record all of this, your codes will be 3 digits in length. (ie: flash flash flash PAUSE flash flash PAUSE flash LONGER PAUSE, code 321)
Then come back here with the results and we'll have you fixed in no time. If you need more help just ask me.
Find this:
Pop the hood, its right in front of the drivers seat. On the inside of the fender, right near the brake fluid reservoir. They might be hiding under a cover that says DIAGNOSTIC PORT.
Connect it this way:
Just use a piece of scrap wire or even a paper clip.
Grab a piece of paper, or what I like to do is put my phone into video camera mode and film it. Hop in the drivers seat, turn the key to run but don't start your truck. Watch the check engine light, it will start flashing. Record all of this, your codes will be 3 digits in length. (ie: flash flash flash PAUSE flash flash PAUSE flash LONGER PAUSE, code 321)
Then come back here with the results and we'll have you fixed in no time. If you need more help just ask me.
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New User
Joined: Jan 2014
Posts: 11
Likes: 0
It's good to know that I have the support that I need from everyone here to get my truck back in good working order. I will try to reply back as quickly as I can so that we can keep the ball rolling. Thanks.
Junior User
Joined: Jan 2014
Posts: 86
Likes: 0
From: The Golden State
I can't believe that this only just occurred to me: is your 8 MPG average based on mostly city driving, mostly highway driving, or a pretty even split?
New User
Joined: Apr 2015
Posts: 4
Likes: 0
Is the STI Connector the single/gray connector with the yel/bk wire
Also, the link to the EEC check (in Read me First) is broken - for me..
Also, the link to the EEC check (in Read me First) is broken - for me..
Alright Evan, please do this.
Find this:
Pop the hood, its right in front of the drivers seat. On the inside of the fender, right near the brake fluid reservoir. They might be hiding under a cover that says DIAGNOSTIC PORT.
Connect it this way:
Just use a piece of scrap wire or even a paper clip.
Grab a piece of paper, or what I like to do is put my phone into video camera mode and film it. Hop in the drivers seat, turn the key to run but don't start your truck. Watch the check engine light, it will start flashing. Record all of this, your codes will be 3 digits in length. (ie: flash flash flash PAUSE flash flash PAUSE flash LONGER PAUSE, code 321)
Then come back here with the results and we'll have you fixed in no time. If you need more help just ask me.
Find this:
Pop the hood, its right in front of the drivers seat. On the inside of the fender, right near the brake fluid reservoir. They might be hiding under a cover that says DIAGNOSTIC PORT.
Connect it this way:
Just use a piece of scrap wire or even a paper clip.
Grab a piece of paper, or what I like to do is put my phone into video camera mode and film it. Hop in the drivers seat, turn the key to run but don't start your truck. Watch the check engine light, it will start flashing. Record all of this, your codes will be 3 digits in length. (ie: flash flash flash PAUSE flash flash PAUSE flash LONGER PAUSE, code 321)
Then come back here with the results and we'll have you fixed in no time. If you need more help just ask me.
Senior User
Joined: Jun 2012
Posts: 463
Likes: 0
From: Rohnert Park Ca.
Yes its the single connector with yel/blk wire's
Posting Guru
Joined: Nov 2004
Posts: 1,137
Likes: 2
From: Asheville, NC
I'd still suspect a faulty thermostat if the temp gauge drops when you take off.
Do the easy stuff first.
My T'stat was OEM. Replacing it brought the gauge up to normal ranges, and also cause the ECC to come to life and start working properly.
Do the easy stuff first.
My T'stat was OEM. Replacing it brought the gauge up to normal ranges, and also cause the ECC to come to life and start working properly.
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