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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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...
These rugged trucks have aged well, with old plastic parts and a few TSBs needing your attention. The phrase "Out with old and in with the new" doesn’t always apply to automobiles. Supply shortages, electronic chip shortages, and economic concerns have the automotive...
Through specific examples, we'll discuss how to address this technology in the shop environment. There has already been a plethora of information written on Advanced Driver Assist Systems, or ADAS. This article looks to build on the wealth of information already...
“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.