Engine Performance problem
2003 Chevy Prizm 4 cyl Front Wheel Drive Automatic 150000 miles
Hi, At approx 100k started pinging, attributed to bad gas at independent station, switched to shell/chevron
better results but somedays ping somedays not. Went
up to premium, no ping or not much. At 130k chk eng lite came on p0420, days later lite out only to come on for days then out. At 150k lite stays on, checked
codes, now have p0171 and two p0420's. Mileage
had remained in 32-34 mpg range, now 28-31.
I am a medical courier so drive 150-200 mi a day, 70-
80% freeway 65-70 mph, so this premium gas is
hurting and now the drop in mpg makes worse.I
can't afford to take to a shop that's going to do
the parts changing routine to just find out days
later the lite comes on again. Thanks for ur help
have the same problem?
Tuesday, May 5th, 2009 AT 11:18 AM