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I was trying to help a friend out with his tpi car who lives in another state. He just experienced a code DTC - 53 System voltage too high. He replace his alternator and cleared the codes and no while driving for a while he gets a DTC -88 Internal reset of Electronic Control Module (ECM) and the car dies. I have never seen a code 88 on a 1227730 must be in the firmware. I assume the bad alternator voltage spikes killed the ecm? any thoughts on this
just checked my email, he is now getting a code 33 for 90-92 tpi sd map, and code 98 never seen that one before?
no 7730 mask has a code 98 or 88.
definitely sounds like a dead ECM/PROM.
just found the listing for 98 - Invalid PCM program, To try to help this kid out I gave him a v6 memcal that I did a cylinder select mod and has to solder in a 27c256 into the memcal. it was working great until he got the code 53.
Odd?
1995 LT1 has a 98 "98 Tach output signal showed incorrect potential voltage at PCM for 26 seconds. "
Here's a good page for codes but still no 98 or 88 for his car?
http://www.troublecodes.net/GM/
eaglemark I found that site as well, I know real odd ! I did not know if there were these codes outside the 8d mask and in the firmware. I leaning towards zapped ecm
Is he counting flashes wrong? Or is this off a scan tool?
He is doing the blink count. my first thought was a wrong count. got me confused on helping the guy.
Intermittent failures... strange codes..... inconsistent problems... It's a virus!!!! They're everywhere!!!!!! If he doesn't get it cleaned up right away he'll end up replacing everything electrical. Tell him to close any open windows then shut down and restart the car before going any further.
maybe he just needs to use windex to do a windows clean and kick the tires with some steel toes boots for a hard reboot
I posted this on tgo in hopes of getting the master of the $8d mask to chime in ( RBOB)