krisj
Newbie
Last year I moved to the Atlanta area. Metro area ATL requires passing emissions testing for vehicles under 25 years old. I lived in Tallahassee, FL for many years and there is no emissions testing there.
My truck is a '94 3/4 ton 5.7 with about 250k miles. It runs pretty well considering it's age, but failed emissions due to high HC and high NOx on both 25/25 and 50/15.
On 25/25 test HC(hydro carbon) ppm was 178. Up to 131 is allowable...FAIL, and NO(nitrogen) ppm was 2510. Up to 818 is allowable...FAIL. Everything else passed on the 25/25 test.
On the 50/15 test HC ppm was 167 / 134 allowable...FAIL, and NO ppm was 2532 / 893 allowable... FAIL. Everything else on 50/15 test passed.
Every now and then my SES light comes on. I pulled codes with a paper clip and retrieved code 32 which I think is EGR. Last year I replaced the EGR sensor and the other day my friend tested the valve and the engine choked down like it should. Plugs are whitish tan.
Does anyone know how to interpret the test data and tell me what to fix or replace? I sure could use some advice. Thanks.
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My truck is a '94 3/4 ton 5.7 with about 250k miles. It runs pretty well considering it's age, but failed emissions due to high HC and high NOx on both 25/25 and 50/15.
On 25/25 test HC(hydro carbon) ppm was 178. Up to 131 is allowable...FAIL, and NO(nitrogen) ppm was 2510. Up to 818 is allowable...FAIL. Everything else passed on the 25/25 test.
On the 50/15 test HC ppm was 167 / 134 allowable...FAIL, and NO ppm was 2532 / 893 allowable... FAIL. Everything else on 50/15 test passed.
Every now and then my SES light comes on. I pulled codes with a paper clip and retrieved code 32 which I think is EGR. Last year I replaced the EGR sensor and the other day my friend tested the valve and the engine choked down like it should. Plugs are whitish tan.
Does anyone know how to interpret the test data and tell me what to fix or replace? I sure could use some advice. Thanks.
Sent from my SPH-M820-BST using Tapatalk 2