[Emilime75]

Had my first and only(so far) long crank yesterday afternoon. Recently did maintenance which included plugs, coils and walnut blast, among a bunch of other stuff that's unrelated. Still having mostly a warm start issue where it stumbles a bit while cranking and the idle fluctuates once it starts, so I started monitoring fuel pressure a couple of weeks ago.

I'm a little limited in what I can monitor as I only currently have Torque Pro. But, everytime I've checked it, rail pressure with the engine off stays at around 72 psi, and with engine running it averages just above 700. No drivability issues.

Really don't know what caused the long crank yesterday, but I'll keep monitoring rail pressure before/during every start up from now on until it happens again.

So, I guess the question is, when the FPR goes, is it sudden, does it slowly fail and get worse, and most importantly, is it ever intermittent?

[Emilime75]

Also, I checked for leaky injectors last night and found one that was definitely leaking, and another that is suspect. They're index 7s, so there's an expensive fix already, hoping I'm not also having fuel pump and FPR issues.

[Emilime75]

Got MHD to do a proper log and see what the car is doing. Fuel LP and HP look OK to me, what do you all think? Haven't had a long crank since that one incident a few days ago, really confused as to what caused it.

Car is a 2010 with 62k miles and is stock aside from DCI and upgraded charge pipe w/stock diverters VTA, 93oct.

Recent maintenance and repairs - boost solenoids, cleaned Vanos solenoids, Eldor coils, stock Bosch plugs, walnut blast, valve cover, RB external PCV/Mishimoto low side OCC and plugged head ports. OFHG, OCG, serpentine belt with tensioner and idlers, CSF aluminum radiator, vaccuum lines.

https://datazap.me/u/emilime75/log-1...10-11-12-20-21

[Sgop335]

Both lamda banks are not recovering to 235, could be leaky injectors...

[Emilime75]

Originally Posted by Sgop335

Both lamda banks are not recovering to 235, could be leaky injectors...

Interstingly enough, I know I have 1 leaky injector and one that is suspect, so I will be replacing them all with index 12s - have 7s now, I assume original. With that said, cold starts have typically been pretty OK. No misfires, no stumbles during cranking and only mild idle fluctuation for about 20-30 seconds until things settle down. My ongoing issue has been warm, not hot, where it would stumble during cranking...until now having that 1 incident of a long crank.

Here's a log I just took of a cold start after the car has been sitting for 30 hours.

https://datazap.me/u/emilime75/log-1...12-13-16-17-18

And, before I posted this I wanted to get a log of a warm start, so I waited about 40 minutes and went back to log it. Lo and behold, I got a long crank, about 2 seconds based on the log timeline.

https://datazap.me/u/emilime75/log-1...12-13-16-17-18 I don't necessarily see anything wrong here, but I'll also admit that I am not very well versed in reading some of these parameters. I do wonder as to what's going on at 275 to 316 seconds into the log? I raised idle by pressing down the gas pedal and held it extremely steady, however the idle kept bouncing. What's up with that?