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Ron, ASE Certified Technician
Category: Ford
Satisfied Customers: 23821
Experience:  23 years with Ford specializing in drivability and electrical and AC. Ford certs and ASE Certs
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Have a 1993 Ford E350 Van with a 460 V8 I am trying to smog.

Customer Question

Have a 1993 Ford E350 Van with a 460 V8 I am trying to smog. HC is great at about 35, CO is high at 1.70, CO2 is low at about 8 and O2 is high at 7. Now CO indicates a rich mixture and O2 indicates lean, but there is an air pump so that may be the cause of the high O2. I have checked ignition, new plugs and wires. Checked for vacuum leaks and found none. EGR is working as it should. Any thoughts from the smog experts?
Submitted: 11 months ago.
Category: Ford
Expert:  Wolfgang replied 11 months ago.

Thanks for choosing Just Answer . I'm Wolfgang here to help!!

I am confident we can resolve your problem together. Please
understand that I don't know your skill level. In most cases when you have a problem
with the way the vehicle performs, specialized tooling is required to acquire computer
data/information or engine testing results. We didn’t build these complicated vehicles; we
just diagnose and fix them. Also understand that I can't see, smell, hear, or touch the
vehicle either, so it may take a few replies to get to satisfactory results. Note there may be an issue where the complexity of the issue will require a Premium Service. This service will be an addition to the normal question cost. Usually it does not come down to this but keep in mind!! I am also going to direct you with the fastest, easiest and most common things to check first. Please be
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did you do an eec test koeo and koer any codes?

please let me know!!

Customer: replied 11 months ago.

No codes, but the PIDs are a bit limited with my scanner. (Snap - on)

Customer: replied 11 months ago.

No Codes on either.

Expert:  Wolfgang replied 11 months ago.

how is your timing ? is the timing chain stretched? please check !!