i recently lost my old motor to water (hydolock) i got a replacement ls motor installed. but now i seem to have and exhaust leak, sounds like its coming from the front near the manifold, now sometimes when i start to drive my car will sputter and the rpms will drop no matter how hard i press the accel. then it just pops back to normal...very confused, told it may be an o2 sensor. any ideas? my car sounds like ****

 

is it throwing any codes?
if it was the oxygen sensor it would show your cel.

 

the cel does come on once in a while but not all the time

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by diesel1245 &raquo;</TD></TR><TR><TD CLASS="quote">the cel does come on once in a while but not all the time</TD></TR></TABLE>

well if you have a CEL then there's your problem. is your car obd0?

 

not sure, 95 ls, i really dont know the difference