Hello, I inherited my Dads '91 LX 2.3l after he died and have a few problems. Check engine light came on, tach would jump 200 to 300 rpm, gas mileage dropped almost in half. I put a scanner on it and replaced the TPS, EGR, and the egr pressure sensor. Car seems to be running better, the rpm's have settled down but still throwing a 332 code( egr not opening). Any ideas? I hate to just swap parts, gets expensive quick. Thanks in advance!