01 300M 300,000km won't start.
Has code P0601
Has spark, inj pulse, 60psi fuel pressure, 150psi compression and t-belt is ok. Should I change PCM and if so, is it plug and play or do I need a DRB to match vin to BCM?
Only have a snap on red brick so reflash would be tow to dealer. This one is my second apprentice car, my first apprentice i posted 07 fusion--lol. So i am 400km north on holiday. He has been playing with this for 3 weeks. for giggles, he put in a cam and crank sensor too. Why i dont know, its got spark and pulse.
Three weeks? Have him disable fuel pump, let it sit for a while, then try starting with a blast of carb-cleaner or starting-fluid. That will confirm that it is "only" a fuel problem, ignition, valves, timing, compression, etc. are all OK. Then the question will be whether it is too lean or too rich, looking at the plugs (after fuel pump enabled again) should help there. Either too rich or lean could be a lot of different things, I always suspect the ECT first, but with an ECM ROM code it's most likely the ECM itself.
That's why I suggested trying a blast of primer fuel, have him learn how it can eliminate a whole lot of things very easily and quickly; before throwing parts at it like the CKP and CMP sensors. Often a spark will "look" OK, but not be. If the engine will fire and run briefly with the primer, then spark is surely good enough to not be the cause of no-start.
Did he disable the FP and let the engine sit for a while, too make sure it isn't flooded? Primer fuel might not work if the plugs are wet. But, it's sounding like there is no spark. At the start of this thread you said there was spark, how was that determined? Oh, yeah, if he still thinks there is spark, but not at the correct time, he should now learn the joys of a timing light...
Ok, I checked this myself. Has code Po601 internal pcm fault and a tps low voltage code. Has had P0601 for 3 yrs. TPS working on scanner but full throttle reads 83%. Spark, inj pulse good. cam and crank signals ok and in sync. 12ms inj pulse on roll over and varies 10-16lbs vacuum. Map at 99kpa. Open loop, o2s at 0.49v. Coolant temp sensor reads outside temp.T-belt is on its marks. Pulled out plugs and they were flooded. Cleaned plugs and rolled engine over with no plugs in. Installed plugs, pulled fuel pump fuse and gave a shot of qick start--nothing, not even a sputter. Removed egr to check if it is stuck open-ok. Upper plenum has a lot of sludgey oil in it. PCM??
I'll ask again, are you sure there is spark and at the right time? Compression OK? Clarify what you means about 99kPa MAP and 10-16lbs. vacuum. Are those both while cranking (roll over?), is that 10-16lbs. vacuum intake manifold vacuum? That's too much vacuum while cranking, and not consistent with the 99kPA MAP. Almost sounds like there is blockage in the intake system between where MAP is sensed and where vacuum is being read, and that the vacuum gauge is closer to the intake valves... so engine is getting starved of air/fuel mixture when the spray can is used, but being flooded when the port-injectors fire. Ignoring a code, especially one like PCM internal failure, for three years is kind of self-defeating. This apprentice is off to a bad start as a technician!
Baro 99kpa and Map 10-16 cranking. Coil over plug engine--can't really verify spark at the right time. Compression 150 all cyl's. He has no problem spending $$$$ on our fleet but his own car has never seen a dime! Spends all his money on the girls----lol!
That P0601 is daming... no troubleshooting for it ... BUT as this has been a 3yr issue I agree working around the p0601 might be worth it...
I did NOT see fuel pressure...?
What is the voltage at the MAP & TPS? I ask because the Hg and kPa do not match expecting the same for TPS...