80LS1T Posted July 28, 2006 Share Posted July 28, 2006 Hey guys Im looking for a little help here... I have a 2000 Maxima with a 3.0L VG30 that I've been fighting with for a few days at work. The problem I'm having is that on cold start up it idles rough. Also when flooring the gas pedal while driving it doesn't want to go full power, just kind of bogs down and slowly gains speed. I'm not sure if these two problems are related yet or not. Now if you only go about 50%-70% throttle the car will get up to speed no problem. Here's what I've done.... New EGR control valve New EGR Temp sensor Cleaned EGR passage into intake New intake gasket Checked for any vacuum leaks-none found Checked o2's for responsiveness-all ok Swapped in 6 coils from a known good running car-no change Updated the ECM to the latest version-no help Swapped the MAF with a known good one-no help Swapped the intake air temp sensors with a known good one-no help Checked the resistance of all 6 injectors(all @ about 13 ohms-good) Flushed injectors with "BG injector cleaner" Checked spark plugs for excessive wear-they look fairly new Cleaned the 2 ground wires by the oil fill cap-no help Performed relearn for IAC sensor-no help Performed O2 sensor relearn-no help I am fresh out of ideas and so is everyone else I've talked to. I've tried searching the web but haven't found anything that I haven't already tried! Guy Quote Link to comment Share on other sites More sharing options...
Mr.INSANE Posted July 28, 2006 Share Posted July 28, 2006 I really have no idea but if theres is one maybe Tps? Quote Link to comment Share on other sites More sharing options...
Twizted Posted July 28, 2006 Share Posted July 28, 2006 There was a recall on Maxima's for coils and reprogram the ECM. I believe your year may have been part of it. Although you mention you did that already. The TPS is a good idea, I've had symptoms like yours on my Z and changing that seemed to work. Have you been able to locate the Factory TSB's online? Quote Link to comment Share on other sites More sharing options...
80LS1T Posted July 29, 2006 Author Share Posted July 29, 2006 I installed a new MAF("counter measure" MAF as Nissan calls it) and flashed the ECM with special software for the new MAF. Car runs like a million bucks now! I think the car that I swapped the MAF out of the first time is either not the same MAF or the PCM programming was not for that MAF. All I know is that headache is out of my life! Guy Quote Link to comment Share on other sites More sharing options...
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