Rx300 non starter

[Fsp4790]

Hi my rx300 won't start it turns over fast it has petrol going it engine it has a spark as I have just changed the 6 plugs and air filter Battery charged up I have checked for fault codes non are coming up so I am struggling to work out why it won't start would appreciate any help 🤔🤔

kind regards Ray

[Chris Skelton]

Having just changed plugs.....hmm? try the old ones? (Do the PLUGS have a spark)

[robski]

As Chris says, if this problem coincided with the plugs being changed then it kind of suggests that either the plugs are at fault or the connections within the ignition system.

Hopefully it's an easy fix for you.

[Fsp4790]

Hi Chris yes all new plugs have a spark there is fuel going into the engine there is good compression Ray

[sorcerer]

I'm no mechanic so take from this what you will. A few weeks ago my Nissan Maxima QX 3.0 SE + Auto wouldn't start and, just like you, everything seemed to be right (fuel, spark etc).

It turned out to be the Mass Air Flow Sensor, which was completely unexpected because, usually, if that goes the car still runs but lacks power, whereas ours was a complete non-runner. Got a brand new replacement from eBay for £25 instead of the £303 that Nissan wanted and it fired up and ran like a dream after that.