Lately I have been noticing small "pops" in my exhaust. When the engine is idling, the pops sound like small puffs of air popping near my engine and/or headers. There's no patten to the popping, but they happen fairly frequently. When the rig is in gear and I am driving, the pops result in significant engine cut-out. And at around 4-5k RPM in 3rd gear, my acceleration flat-lines even though I may be only going 55 MPH or so.
- On the trail, my engine stalls for (more or less) no reason sometimes. For example, it stalled this weekend when I crawled over a 6" rock right before I crawled up a 5' rock wall without event. After it stalls, I can get the engine to start back up, but it sometimes takes a bit of effort for everything to turn over.
- Occasionally the rig will idle low to the point of almost stalling. This is most noticeable when the engine is idling. And it typically happens when I start the rig up.
Relevant parts of my build:
- 2008 JK fed with 93 octane gas
- 3.8L V6 with RIPP supercharger/header tune
- Stock manual transmission
- RIPP Stage 2 supercharger kit with 10psi pulley
- 180 degree thermostat
- RIPP long tube headers with aftermarket hi-flow cats (x2)
- Flowmaster HP-2 exhaust
No MIL/CEL/idiot light indicator on the dash.
My thoughts on possible root causes:
- One or more bad spark plugs and/or cables
- One or more bad injectors
- Vacuum leak*
- Exhaust leak
*since the engine idles low occasionally (rather than idling high), I am thinking that a vacuum leak is not as likely as the others.
Any idea on what could be causing my problems? If you were me, where would you start with diagnosing the problem?
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.