Harry, a long time veteran of the force, was nearing the finish line of his career. His retirement was fast approaching and, as such, he had been relegated to mostly desk duties. A ‘house mouse’ was the term for an officer who did not leave the stat...
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Noise, Vibration and Harshness (NVH) is an important topic and one that auto manufacturers take very seriously. Large amounts of time and money are devoted to research and development in this area. Engines and transmissions spend hours on NVH test benches before ever...
There are many issues that can arise in the HVAC system, and new regulations to be aware of. Let us dissect the HVAC acronym and take a closer look at each of the letters individually. HVAC is a very familiar acronym for Heating, Ventilation and Air Conditioning. From...
We will take a look at an Infiniti suffering from a timing problem. It has been said that time waits for no one, and that is certainly true for auto technicians. There is always a vehicle to diagnose or a repair that has to be done by the end of the day. There are...
“So Harry would expect this 3.5 liter VQ35DE engine to be reading 6.0 – 6.1 grams per second at 863 rpm.”
I think that would still be too high at idle, I would expect to see closer to half that.
Also wanted to add that I have had some sucess in getting the idle speed down low enough to complete idle air learn by restricting fuel line (when possible). Trans needs to be warmed up too.
Harry was basing his numbers on a simple equation of 1 gram per second per liter of displacement at 500 rpm, but this is not an exact equation. Unfortunately, Harry did not record what the new MAF sensor was reading, only that the fuel trims were normal. Restricting the fuel line is another idea for completing the Idle Relearn, but we would caution pinching fuel lines, especially hard plastic lines.
“So Harry would expect this 3.5 liter VQ35DE engine to be reading 6.0 – 6.1 grams per second at 863 rpm.”
I think that would still be too high at idle, I would expect to see closer to half that.
Also wanted to add that I have had some sucess in getting the idle speed down low enough to complete idle air learn by restricting fuel line (when possible). Trans needs to be warmed up too.
Nice read. A lot of useful insights.