So here's a new one. Last year, the truck sailed through emissions. Literally almost no NOX to speak of, low CO, etc. Thought I was doing great.
This year, I get failed at two stations. The idle test is fine, but the dynamic load test (rolling road) keeps blowing the error "VMass flow error" and shutting the test off.
The first shop says it's in the carb. I'm running too rich and heating up his equipment too much (he says the test pipe is melting from the heat). His prescription is for a carb rebuild.
The second shop says a VMass Flow Error means there's not enough volume of air flowing through the equipment, and the machine thinks I'm trying to cheat by not having the hose hooked up properly. Their diagnosis is a blocked exhaust system or clogged cat.
Have any of you had this happen, or know what it means? I find it strange that two shops could have such different interpretations of a single error.
I need to get this resolved before I leave, so any help at all is appreciated.
This year, I get failed at two stations. The idle test is fine, but the dynamic load test (rolling road) keeps blowing the error "VMass flow error" and shutting the test off.
The first shop says it's in the carb. I'm running too rich and heating up his equipment too much (he says the test pipe is melting from the heat). His prescription is for a carb rebuild.
The second shop says a VMass Flow Error means there's not enough volume of air flowing through the equipment, and the machine thinks I'm trying to cheat by not having the hose hooked up properly. Their diagnosis is a blocked exhaust system or clogged cat.
Have any of you had this happen, or know what it means? I find it strange that two shops could have such different interpretations of a single error.
I need to get this resolved before I leave, so any help at all is appreciated.