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swill424242
10-20-2009, 06:14 AM
Engine Surges Underload between 2500 and 3000 RPM's my mechanic has no clue i have changed the fuel filter and o2 sensor and there is no codes

gtopaul
10-20-2009, 08:31 AM
Fuel pressure test first. Catalytic convertor check 2nd.

swill424242
10-20-2009, 08:56 AM
ok question say it is my cat how do i test it to find out its my cat ????????????

gtopaul
10-20-2009, 02:22 PM
ok question say it is my cat how do i test it to find out its my cat ????????????

There's actually a probe that a good shop will have that can be used to test the exhaust.