Same problem new thread! GOT SCANNER!
Team Owner
Joined: Jul 2004
Posts: 28,331
Likes: 3,245
From: Hartford WI
Would this mean inputting a different year and/or eighth VIN digit when I first set up the scanner? For example input to the scanner, 86, then try 87, then try 88, and so on, until one configuration works? Also, I didn't hear a response back on the main fan running all the time the ignition is on, I don't think this is normal, is it?
Thread Starter
Instructor
Joined: Jun 2013
Posts: 138
Likes: 4
From: Apollo Beach Florida & Michigan
The fact you have cleaned or adjusted sensors does not necessarily mean they are functioning properly. A case in point, for some time, I have had an idle issue that I wrote off as part of a new engine and custom tune. Recently I started getting intermittent codes regarding the throttle position sensor. I checked the adjustment and it was right on. So I replaced the TPS with a known good sensor. The problem was solved.
If you had the wrong ECM, I doubt your car would even start and it should definitely not flash a normal Code 12. Code 12 is supposed to indicate a good ECM. And as far as all the codes go, I suspect a setup problem with the scanner. You should not be getting a bunch of erroneous codes for different year vehicles. If the scanner won't connect, that should be a clue that the setup is wrong or the scanner is not compatible.
Backtrack your steps to when the car last ran.
If you had the wrong ECM, I doubt your car would even start and it should definitely not flash a normal Code 12. Code 12 is supposed to indicate a good ECM. And as far as all the codes go, I suspect a setup problem with the scanner. You should not be getting a bunch of erroneous codes for different year vehicles. If the scanner won't connect, that should be a clue that the setup is wrong or the scanner is not compatible.
Backtrack your steps to when the car last ran.
Drifting
Joined: May 2013
Posts: 1,736
Likes: 31
From: Reno Nevada
The scanner should function using your 8th digit. Fans on is part of limp home mode brought on by your ecm, and or memcal failure. Put it back together again, try it, scan it and see if it pulls the same codes.
Team Owner
Joined: Jul 2004
Posts: 28,331
Likes: 3,245
From: Hartford WI
Thread Starter
Instructor
Joined: Jun 2013
Posts: 138
Likes: 4
From: Apollo Beach Florida & Michigan
Thread Starter
Instructor
Joined: Jun 2013
Posts: 138
Likes: 4
From: Apollo Beach Florida & Michigan
I'll do that after I get some Deoxit and spray the pins and connectors.
Team Owner
Joined: Jul 2004
Posts: 28,331
Likes: 3,245
From: Hartford WI
Thread Starter
Instructor
Joined: Jun 2013
Posts: 138
Likes: 4
From: Apollo Beach Florida & Michigan
Right now, I don't have a bunch of C-4 parts laying around. If it comes to buying another ECM or Medcal, I'll look for suggestions on what and where to buy them.
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Thread Starter
Instructor
Joined: Jun 2013
Posts: 138
Likes: 4
From: Apollo Beach Florida & Michigan
I should have kept the old ECM as you have suggested. Lesson learned! No, I kept the old Eprom/Medcal, and installed it in the remaned ECM.
Melting Slicks
Joined: Mar 2008
Posts: 2,141
Likes: 76
From: Santa Maria, CA
After looking at the manual, your scanner will not read the sensors on your 86. It will only retrieve stored codes. I suggest you place the scanner on the workbench and go back to reading codes with a paper clip. That will eliminate false codes from configuration problems. Verify there are no stored codes (Code 12 only).
When you plug in the scanner it puts the ECM in diagnostic mode. The fan will run in diagnostic mode. That's normal.
After you clean the terminals and verify the ECM is installed correctly, you should look into getting a tool that will give you more insight to sensor readings. Without more insight it is going to be very difficult to troubleshoot.
When you plug in the scanner it puts the ECM in diagnostic mode. The fan will run in diagnostic mode. That's normal.
After you clean the terminals and verify the ECM is installed correctly, you should look into getting a tool that will give you more insight to sensor readings. Without more insight it is going to be very difficult to troubleshoot.
Melting Slicks
Joined: Mar 2008
Posts: 2,141
Likes: 76
From: Santa Maria, CA
On another note, I would recommend investing in a good book. I bought "Corvette Fuel Injection" by Charles Probst. It's a good introduction to TPI systems.
The scanning method I recommend is to use a laptop. You can download the software from Tuner Pro RT. If you download the older version it is free. Also download the ADS files for your car. You'll need to purchase an ALDL cable. I got mine from www.aldlcable.com. They sell for $60. This will allow you to view all sensors and codes real time and record the data. The software allows recorded data to be converted to Excel. This setup has saved me a lot of money in parts.
The scanning method I recommend is to use a laptop. You can download the software from Tuner Pro RT. If you download the older version it is free. Also download the ADS files for your car. You'll need to purchase an ALDL cable. I got mine from www.aldlcable.com. They sell for $60. This will allow you to view all sensors and codes real time and record the data. The software allows recorded data to be converted to Excel. This setup has saved me a lot of money in parts.
Thread Starter
Instructor
Joined: Jun 2013
Posts: 138
Likes: 4
From: Apollo Beach Florida & Michigan
After looking at the manual, your scanner will not read the sensors on your 86. It will only retrieve stored codes. I suggest you place the scanner on the workbench and go back to reading codes with a paper clip. That will eliminate false codes from configuration problems. Verify there are no stored codes (Code 12 only).
When you plug in the scanner it puts the ECM in diagnostic mode. The fan will run in diagnostic mode. That's normal.
After you clean the terminals and verify the ECM is installed correctly, you should look into getting a tool that will give you more insight to sensor readings. Without more insight it is going to be very difficult to troubleshoot.
When you plug in the scanner it puts the ECM in diagnostic mode. The fan will run in diagnostic mode. That's normal.
After you clean the terminals and verify the ECM is installed correctly, you should look into getting a tool that will give you more insight to sensor readings. Without more insight it is going to be very difficult to troubleshoot.
Melting Slicks
Joined: Mar 2008
Posts: 2,141
Likes: 76
From: Santa Maria, CA
Cleaned the ECM , Medcal, and several other plug/jacks above the pass side foot well, with Deoxit spray. Repeatedly connected & disconnected the circuits, then reconnected the battery and shorted ALDL. Within seconds I got the 12 code but no others. In the past it was difficult to get anything but a steady SES light. I reconnected the scanner, of course there should be no codes, with the battery disconnect reset. The scanner showed six codes but this time they were 41, 45, 46, 52, 54, 63. slightly different than the previous scan. As you suggested, forget the scanner. Tried to start the car, just cranks, and a fuel smell, tried WOT to clear flooding, but no luck. If the 12 code is saying everything is OK. What next? Injectors?
Thread Starter
Instructor
Joined: Jun 2013
Posts: 138
Likes: 4
From: Apollo Beach Florida & Michigan
On another note, I would recommend investing in a good book. I bought "Corvette Fuel Injection" by Charles Probst. It's a good introduction to TPI systems.
The scanning method I recommend is to use a laptop. You can download the software from Tuner Pro RT. If you download the older version it is free. Also download the ADS files for your car. You'll need to purchase an ALDL cable. I got mine from www.aldlcable.com. They sell for $60. This will allow you to view all sensors and codes real time and record the data. The software allows recorded data to be converted to Excel. This setup has saved me a lot of money in parts.
The scanning method I recommend is to use a laptop. You can download the software from Tuner Pro RT. If you download the older version it is free. Also download the ADS files for your car. You'll need to purchase an ALDL cable. I got mine from www.aldlcable.com. They sell for $60. This will allow you to view all sensors and codes real time and record the data. The software allows recorded data to be converted to Excel. This setup has saved me a lot of money in parts.
Drifting
Joined: May 2013
Posts: 1,736
Likes: 31
From: Reno Nevada
Personally, I know that the Moates.net cable will work with Datamaster.
http://www.moates.net/aldu1-and-cabl1-p-127.html
Datamaster is more user friendly than the free ones and can be used 20 x for free.
http://www.ttspowersystems.com/DataM...ownloads2.html
Cumberer's recommendation may be right. This is my opinion alone. I've built a webpage with instruction how to use it too! 10k resistor is required for the 7165.
http://www.moates.net/aldu1-and-cabl1-p-127.html
Datamaster is more user friendly than the free ones and can be used 20 x for free.
http://www.ttspowersystems.com/DataM...ownloads2.html
Cumberer's recommendation may be right. This is my opinion alone. I've built a webpage with instruction how to use it too! 10k resistor is required for the 7165.
Thread Starter
Instructor
Joined: Jun 2013
Posts: 138
Likes: 4
From: Apollo Beach Florida & Michigan
Disconnected MAF, and tried to start, left MAF disconnected & gave it a couple of shots of starting fluid, reconnected MAF and repeated starting fluid, foot off gas pedal, then on pedal with various stages of TB opening. Tries to start but won't catch!
Team Owner
Joined: Jul 2004
Posts: 28,331
Likes: 3,245
From: Hartford WI
Check the spark quality. Ground a plug and plug the wire in and crank. All 8 should give you a blue flame.
Thread Starter
Instructor
Joined: Jun 2013
Posts: 138
Likes: 4
From: Apollo Beach Florida & Michigan
Personally, I know that the Moates.net cable will work with Datamaster.
http://www.moates.net/aldu1-and-cabl1-p-127.html
Datamaster is more user friendly than the free ones and can be used 20 x for free.
http://www.ttspowersystems.com/DataM...ownloads2.html
Cumberer's recommendation may be right. This is my opinion alone. I've built a webpage with instruction how to use it too! 10k resistor is required for the 7165.
http://www.moates.net/aldu1-and-cabl1-p-127.html
Datamaster is more user friendly than the free ones and can be used 20 x for free.
http://www.ttspowersystems.com/DataM...ownloads2.html
Cumberer's recommendation may be right. This is my opinion alone. I've built a webpage with instruction how to use it too! 10k resistor is required for the 7165.
Drifting
Joined: May 2013
Posts: 1,736
Likes: 31
From: Reno Nevada
http://www.scotthansen.net/data.html