hunterdan
Explorer Addict
- Joined
- October 21, 2004
- Messages
- 1,380
- Reaction score
- 1
- City, State
- Fairless Hills, Pa
- Year, Model & Trim Level
- 2010 Chevy Silverado
My 98 OHV sport has recently been acting up. I frequently make 100+ mile runs between Harrisburg and Philadelphia. The trip is almost 100% highway. Whenever I come to a complete stop or where the truck would just idle along after a long period of highway driving, it will idle rough, about 500 RPM or lower. Usually if I hit the gas it will take care of the idle and then idle normally. On my last 2 trips out to Harrisburg, I stopped at a rest stop about midway, the first time was to fill up, the latest was a coffee stop. Both times the idle would be rough when comming to a stop when idling, and then after about 5 minutes of highway driving again, the CEL came on. The code was read to be P1151 which I know is one of the O2 sensors. Both upstream sensors are just over a year old. I am also noticing a delayed acceleration when depressing on the throttle. It doesn't seem to be tranny related, but more like the engine is lugging, then all of a sudden its got more power and I start to pull away much harder. If I were to guess, I would say my problem is with the EGR system, but the P1151 code is throwing me off. I pulled the driver's side O2 sensor and sprayed cleaner in it trying to help. The really odd thing is, it only does it on my way to Harrisburg, never on my way back home to Philly. Also, my mileage out there was much worse even though i was cruising at 65, but on the way back I got over 20 mpg at 75+ mph. Any suggestions on what the problem may actually be? I have a homemade PVC intake, but have tried the stock intake tube and still had the rough idle. The CEL is a new development, although it goes out on its own after a day or so. The lack of power seems to be more prevalent after the rough idle has occurred, it was very bad on a trip to Bloomsburg a few weeks ago, but never tripped the CEL. Please help, any suggestions would be very helpful.
Dan
Dan