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Melling offers oil pumps that are:
Standard Pressure / Standard Volume
High Pressure / Standard Volume
Standard Pressure / High Volume
High Pressure / High Volume

On engines equipped WITH DOD...

Similar to my cam, and I believe higher on the stage 1 specs.

If you have flex fuel: When you do your first log file, make sure you have Alcohol % as one of the logs, as well as commanded AFR. If...

Again, I posted on two other tabs, If you are just disabling the MAF to tune the SD, I would not worry about the code. This tells your engine there is an issue with the MAF and to switch to SD. Just...

I just responded on the other topic. First, I don't own a corvette, so I don't know for that specific application.

On my truck, The entire time I am doing a SD tune, I have an engine code for a...

Wow, you replied quick!!!

I completely forgot he said DOD delete (it took me probably 20+ minutes to write my response).

And yes, DITTO on the Wideband. Makes life a helluva lot easier!!!
...

I dont have a corvette, so I cant be positive...

When you fail the MAF, you want the computer to know it so it will revert to the SD tables. If you are only disabling this to do the SD tuning, I...

Exact cam specs will help here as well as any other mods done. Are you still using a VVT cam or the 3 bolt cam? Did you do a DOD delete?

If you have HP tuners, start with adding a little more air...

The wideband setup you have is the same as mine, you can let it heat up, but when you go to start mode it goes back to warmup.

As for the knocking or dieseling, in older cars is usually equated...

did you do a Throttle Body calibration after you cleaned it? The throttle bodies (if I understand correctly) are adaptive and will adjust over time to being dirty, when you clean them they have to be...

e38 is a gen 4 LS computer (unless they used them on gen 5 too?)... I believe the 2015 would be a gen 5 LT motor? if so, these are pretty much not compatible...

Casey

For the mechanical side, High compression (and large stroke) engines can be hard on starters (it may help to know the compression ratio here). Also, tightly built engines (tight bearing clearances,...

Mine was and partially still is doing the same thing.

If you or someone tuned the truck with the bad flex sensor, than the engine was tuned to 14.6 output while commanding a 12.9. The 12.9 is the...

For starters, Alcohol (ethanol) is not as efficient as gasoline. You need more of it to reach that stoich need. On the other side, ethanol can give more horsepower, especially in higher compression...

Welp,

It can almost always be worse!

Have fun
Casey

Update, and possibly solved.

I don't want to say too early that I figured it out. I was re reading this post because I thought someone had mentioned it before. Posting a link below that got me on...

Thanks to all!!!

I will check it out later!

Casey

I have experienced this a bit during the tuning of my truck. While I don't know the exact cause in the tune file, it is usually indicative of low vacuum (or a failing booster). Look up the...

Could you explain what you mean by installing a real sensor?

Casey

i then scan the alcohol content and its at 30% (which should be pump 87).


Can you explain to a noob how to scan the alcohol content? I think I may be experiencing an issue from the same...

First post on the linked page, look for file "engine only 42221. This is my 2013 5.3 LC9, it may help...

https://forum.hptuners.com/showthread.php?91274-Lean-Idle-cam-swap-with-log-and-tune
...

I may not be able to help in this particular instance, but it would definitely help to see the original tune file to compare...

Casey

Mr.z,

see my last tune file (MAF Step9) I have set all those tabs to a flat 1 already with no noticeable change to the cold starts. I also tried adjusting the stoich tab to all 14.7 and the...

Mr.z

Latest tune as of last night on the way home.

Casey

Update,

None of the modifications seem to help. The truck still runs in the 16-20 range on the AFR gauge, and is showing in the 15% lean range on the scan tool while warming up. Again once warm,...

Gustavo,

I had already changed my gas and alcohol (P/N) and (gear) tabs to 1, as well as my IVT gain tab all to 1s this morning, and noticed no difference. I have just changed the Air and Airflow...