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2 problems I found, (1) If this occurs after 30min cool down, change front O2 sensor (also excess oil on intake can foul sensor and reduce fuel mph). (2) battery slides into computer harness disrupting input/output sensor readings/signals. Put 1" or thicker spacer on rear battery clamp to hold...

my 97 four burner has plenty of power, bought it used, has larger air intake and exhaust, and possibly larger injectors, so I'm told.

try placing a 1 inch spacer on rear battery clamp to push battery away from computer wiring harness. it bumps into harness and disrupts signals to and from sensors

also noted that battery was sliding into PCM connectors, placed rubberized mat under battery and added 1" spacer to rear battery clamp to help push battery forward to help stop irratic firing. Finally after researching 20 cool down backfiring/stalling and talking with auto tech, suggested 02...

Now have a muffled backfiring/stalling after a 25min cool down. Noticed my evaporator surge valve/solenoid was not working, also lines contained deposits, and main line to intake manifold contained large carbon deposits. Replacing valve and canister, could be having a problem with vapors not...

4th owner to wrangler 97. Had problems with backfiring/sputtering/loss acceleration. went to every site tracking down this problem. Finally followed steps to clean PCM (powertrain control module located above battery on passenger side) connectors, and secured them with wireties. Also secured...