Engine Performance problem
2003 Dodge Dakota 6 cyl Two Wheel Drive Automatic 83k miles
My vehicle is very slow to accellerate. I have an OBD2 diagnostic software suit from OBDCOM. There is no MIL set. There is a puffing/hissing sound coming from my engine bay: I have not replaced anything yet it is still stock. I have captured data from both O2 sensors, and Engine RPM and generated a graph. At around 2500 RPM which is very hard to maintain manually my Primary O2 sensor's readings are very erratic. Shouldn't it stabilize at a constant environment. I also noticed the secondary sensor going above 1v is this an issue?
I believe the problem is due to an exhaust manifold leak letting ambiant air into the system. I would like to be a little more positive about this before I spend money on those. Also a secondary question. If I replace the exhaust manifold will there be much benifet if I replace them with headers? Thank you for your time!
have the same problem?
Thursday, August 13th, 2009 AT 11:16 PM