[MyFirstZ]

Sorry if this is in the wrong section, i will try to break it down and give the most info i can.

2001 Chevy Impala 3.4l v6 140,000 miles

Since my gf got this car about a year ago it as been non stop problems between suspension and everything in between so i will list what may be relevant.I will add them if it may help diag it since it can be multiple issues.

Fuel Gauge sweeping - replaced fuel pump assembly not just the level sensor (after market)
Coolant Gauge not reading at all - replaced thermostat and ECT. Flushed coolant (a/c Delco)

The car has been having two issues i cannot seem to find. There has only been one code for an oil level switch which i replaced from what i researched on it and it was only 8$.

The car randomly will have a long crank/no crank. Cold, hot, long distance, short distance trips.

The car will shutter at stop sign/stop lights or any time the car comes to a stop after driving sometimes or it will shut off after starting to pull away from the stop sometimes. Get a battery light put it in nuetral and it sometimes will start right back up no problem. Possibly same problem ?

So far to try and correct this i have found. . .
Broken PCV hose from pcv to intake boot
Oil level switch fault implausibility i think it was (replaced)
Checked battery voltage and alternator output (both good)

Thinking MAF going bad, vacuum leak and/or crank/cam sensor.

Also has an exhaust leak at the resonator which does not seem to be effecting short term or long term fuel trim. Hopefully some one here has encountered this when they brought there car in to get it serviced or has fixed them at the dealer. Please help need ideas on where to go. I have no codes as of last time i checked last week.