My 1990 348 ts has a strange problem. Runs fine part of the time. Just drove it 400 miles home from Dallas with no problems. Drove it this a.m. with no problems. Then, later this afternoon, I started the car and it was hesitant in starting, then when I drove the car after starting it the power was reduced by half. Then, the "check engine 1/4" light came on, went off, and kept coming on and going off. The car never resumed full power. I am guessing that cylinder bank 1/4 is shut down. Any ideas on where to start on this one? A month ago, the same thing was occuring except this time it was the "Check Engine 5/8" light was on. Same circumstances, same loss of power issue. When I sent the car to Dallas for another, unrelated repair, the mechanic could not find a stored code in the ECU, nor could he get the "Check Engine" light(s) to come back on. So, here I am at! I'm just glad it didn't happen during my 400 mile trek home!! Any ideas or suggestions would be greatly appreciated. Also, does anyone know how to interpret the codes, and how to get them? Thanks!