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Old 04-26-2010, 03:26 PM   #16
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Disconnect both terminals on your battery and touch them together for about 10 seconds (don't touch the battery when you are doing this). This discharges any capacitors in the system. Then hook your battery back up, and your PCM will default back to factory settings. Over time they learn driving habits and other crucial info from their environment for better performance. I recommend doing this when buying a used OBDII vehicle and when moving so your PCM can adapt to its new home/driver.
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Old 04-26-2010, 04:19 PM   #17
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Quote:
Originally Posted by 97Trans-AM View Post
Disconnect both terminals on your battery and touch them together for about 10 seconds (don't touch the battery when you are doing this). This discharges any capacitors in the system. Then hook your battery back up, and your PCM will default back to factory settings. Over time they learn driving habits and other crucial info from their environment for better performance. I recommend doing this when buying a used OBDII vehicle and when moving so your PCM can adapt to its new home/driver.
ok I will give it a try, to I need to leave it unplugged for an extended period? or just touch them and hook it back up?
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68 Firebird 400, YC 400, Hbeam rods, ported 670 heads (2.11i, 1.77e valves), 1.65 RRs, Torker 2 intake, Nodular Crank, Eaton Limited Slip, 3.55 gears, M20 M4
65 Impala SS 327 Camelhump Heads, 650 carb, M20 M4 12 bolt 3.73 gears
91 Jeep XJ 2 door. 4X4 NP 231 TC, AX15 M5
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Old 02-26-2013, 06:04 PM   #18
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Thread necro.

I am having the same problem on my 96 Firebird formula. I can't seem to figure out what is causing this flow issue. Can I just put my hand over the top part of the EGR valve where the tube connects, to check for vacuum?

I also have longtube headers. They have a bung and everything but we are having a pinch issue with the tube that comes off of there.
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Old 05-20-2013, 10:42 AM   #19
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Thread necro.

I am having the same problem on my 96 Firebird formula. I can't seem to figure out what is causing this flow issue. Can I just put my hand over the top part of the EGR valve where the tube connects, to check for vacuum?

I also have longtube headers. They have a bung and everything but we are having a pinch issue with the tube that comes off of there.
I still havent fixed this, I was rebuilding my exhaust system (im thinking that my cutouts were causing back pressure problems in the primary where the EGR connects and causing the computer to think the EGR was acting up.)

BUT while I was working on this my OPTI took a crap, and since I just moved and was remodeling the new house, I hadnt had any time to work on it, now that the garage is not filled with boxes and furniture, I have started to work on it again.

I really think there is a leak which is causing the code
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68 Firebird 400, YC 400, Hbeam rods, ported 670 heads (2.11i, 1.77e valves), 1.65 RRs, Torker 2 intake, Nodular Crank, Eaton Limited Slip, 3.55 gears, M20 M4
65 Impala SS 327 Camelhump Heads, 650 carb, M20 M4 12 bolt 3.73 gears
91 Jeep XJ 2 door. 4X4 NP 231 TC, AX15 M5
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