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Stumped on cranking no start, VG30 - EFI, Nissan Pathfinder 1993
I have a Pathfinder, 5 speed manual, around 120k miles, run and drive that was idling a slightly rough but started every time and ran good without stalling at all and then one day it died in an intersection. I could not get it started back up. It turned in to a cranking no start.
I had it towed to my friends and started looking for air leaks. I pulled the o2 sensor to see if its a exhaust restriction. One wire was basically frayed off and it was still getting hot. I messed around with the timing and was able to get it running without the MAF plugged in but it misfires and backfires through the intake. I checked that cylinder #1 was at the very highest point with the cam mark and a scewdriver as the photo shows
I put the fuel line in a bottle to look and see if the gas looked dirty and attached the photo. I sprayed some starter fluid in the throttle and didn't seem to improve the condition. It had a full tank of gas when it died but I know the bottom of the tank was a little dirty from sitting. It has a new amazon fuel pump in the tank directly wired to the fuse box. All the injectors on the rail are new OEM style.
I just reset the engine timing as shown in photos. Black soot on the plug #1. It cranks nice and cylinder one 1 had 155 psi compression checked. Still just cranks....
In my mind Ive ruled out mechanical timing, ignition timing, spark, fuel , and compression.
Is there something that makes it fire too rich like the air sensors? Someone tell me what to do with this car I feel like I'm a level above a parts changer but this vehicle has everything it needs to start up at least rough but all i han get it to do is sputter or backfire . I've spent hours adjusting timing and resetting timing and I'm confident that i'm close to the 8 degrees btdc where I should be getting more action. Still just cranks
If you have a scope, check the signal wires. You won't be able to pick up drop outs with a slow DVOM. Absent that, check for play in the shaft of rotor which might be bearing failure and debris on the slits of the disc like this case study from Paul:
www.scannerdanner.com/scannerdanner-prem...-start-no-spark.html