This had me scratching my head...
Took it in for CA smog. No CELs, running fine.
Hmmm.
No CEL. Checked codes with peak, No codes
Fail. Pretty much the same numbers.
Still fails. CATs again good and hot for test.
138k miles on the ODO
Time for better computers. Took it to a shop for further tests.
So, surprised that I have a vanos issue that is causing no codes, no issues, just running a bit rich.
My plan- replacing:
Thoughts?
A
PS Anyone replace solenoid assemblies recently? What are those puppies running ($$)? I'd usually buy parts prophylactic, but these are not hard failures, and the price for two is a bit surprising....
Took it in for CA smog. No CELs, running fine.
- Failed for Hydrocarbons. 78ppm at 15mph (limit 47) and 57ppm at 25mph(limit 31) (Yes, was hot for test)
Hmmm.
No CEL. Checked codes with peak, No codes
- OBD scanner. Long term fuel trims elevated, 3% on bank 1, 6-7% on bank 2.
- Cleaned MAFs, changed pre AND post cat O2 sensors, new air filters, Oil change, what they heck, eh?
- Drive 300 miles, retest
Fail. Pretty much the same numbers.
- Pull the plenum, check all hoses for leaks. Replace a few. Smoke test. Nothing seen.
- MAF test gives 138.x at redline in 3rd
- Thermostat and T sensor replaced at 13k miles ago, temp readings all good.
Still fails. CATs again good and hot for test.
138k miles on the ODO
Time for better computers. Took it to a shop for further tests.
- Autologic report, looking at O2s and adaptation shows rich... ran the VANOS test:
- Bank 2 shows "Deviation, Leak Test, Exhaust (ocr)" = 9.3 Fail (limit 7)
- Bank 1 showed 6.7, 6.8 and pass.
So, surprised that I have a vanos issue that is causing no codes, no issues, just running a bit rich.
My plan- replacing:
- All 4 CPS,
- All solenoid o-rings (both banks).
Thoughts?
A
PS Anyone replace solenoid assemblies recently? What are those puppies running ($$)? I'd usually buy parts prophylactic, but these are not hard failures, and the price for two is a bit surprising....