New to Tuning

[Army01Vette]

I'm a rookie at tuning and looking for some help. I bought a 01 c5 LS1 6spd that had a tsp maddmaxx cam and supporting addons, and I was told it had a base tune.

The car doesn't want to idle and starts bucking when in low rpm's starting out. I have watched numerous youtube videos and trying different solutions, but haven't had any luck. I attempted to adjust the VE table and had a little success, but then it crapped out so I reverted back.

If someone could look at my tune and see if anything stands out it would be much appreciated.

Thanks for any help.

[gtstorey]

What are "supporting addons"? Injectors? Fuel System?

[RDF1]

What is the part number on the injectors?
Its showing to be really rich from the datalog.

[abc]

Show us a log of it at normal operating temp., at least when the t-stat opens.

Get the info. for the injectors first, but sure looks like the VE table is too rich at idle during the log you posted.

[bk2life]

Thanks for any help.

personally, id say have a dyno tuner in your area and have the car tuned there.
Then you know you wont burn up your engine.
From there you can learn how to tune by datalogging and dialing in what they dyno guys didnt with your street tuning.
You could use the compare file feature and see what they did, and what your stock tune was in order to help learn what needs changed.

To me this is the easiest and quickest way to learn

[Alvin]

I'm a rookie at tuning and looking for some help. I bought a 01 c5 LS1 6spd that had a tsp maddmaxx cam and supporting addons, and I was told it had a base tune.

The car doesn't want to idle and starts bucking when in low rpm's starting out. I have watched numerous youtube videos and trying different solutions, but haven't had any luck. I attempted to adjust the VE table and had a little success, but then it crapped out so I reverted back.

If someone could look at my tune and see if anything stands out it would be much appreciated.

Thanks for any help.

VE isn't proper, This is hard to describe but as someone who does this often you'll know the shape when you seee it. I'd suggest using a wideband in addition with the stock narrow bands to get the VE table correct. Note your tune isn't in speed density at the moment. This might not get along with stock o2's if it truely is the cam you said it is. Close to 230 duration on a 110. It's potentially going to give the narrowbands bad feedback and make the car drive worse

Cranking VE isn't right at all. Someone set it up how GEN 4 + are. it should be close to what is in the main VE table for these.

Since the car is in VE/MAF blended right now.. But favoring the MAF dial in the MAF table for the fuel trims you see now. You are very rich in log. That will cause idle issues, dying,etc.

Also as someone who has done a lot of these.. The MAP doesn't look right for that cam at all. It either has a smaller cam that you think it does or there is a chance the cam is off a tooth. Ever see any crank/cam sensor codes pop up?4

[Alvin]

personally, id say have a dyno tuner in your area and have the car tuned there.

Just be sure they have great reviews. There are far more dyno tuner hacks than good tuners out there.

[edcmat-l1]

The VE isn't right, but more concerning, the MAF table is significantly higher than stock. Like it's an aftermarket MAF or something. That needs to be diagnosed and fixed. At idle the trims are maxed negative and the narrowbands still hover around 8-900 mv indicating it's way "rich".

I'd replace the MAF sensor with an AC Delco unit, put the table back to OE and work from there.

[Army01Vette]

The VE isn't right, but more concerning, the MAF table is significantly higher than stock. Like it's an aftermarket MAF or something. That needs to be diagnosed and fixed. At idle the trims are maxed negative and the narrowbands still hover around 8-900 mv indicating it's way "rich".

I'd replace the MAF sensor with an AC Delco unit, put the table back to OE and work from there.

I'm not sure what brand the MAF is, but it was replaced right before I got the car also.

[Army01Vette]

I replied to a couple other comments, but that post is awaiting approval. It has the cam specs in it.Cam Specs.png

[edcmat-l1]

I'm not sure what brand the MAF is, but it was replaced right before I got the car also.

01 Corvette Tune_OE MAF table_EH1.hpt

This file has the MAF table put back to stock. See what this does. It's possible it has low fuel pressure if they (whoever) had to jack up the MAF table to get it to run.

I replied to a couple other comments, but that post is awaiting approval. It has the cam specs in it.Cam Specs.png

Doesn't matter what cam you put in it. That won't require you to need to raise the MAF table the way it is/was.

[Army01Vette]

Does anyone have a good working tune for that cam setup that they could send over? I don't have the stock tune either. The tune I posted earlier is the "main" tune I have.

Only mods I was told besides the cam is 241 heads, pac 1219 valve springs, LS9 gaskets, Cloyes Timing set, and Borla Stype axel back exhaust.

Wishful thinking, fingers crossed

[Army01Vette]

01 Corvette Tune_OE MAF table_EH1.hpt

This file has the MAF table put back to stock. See what this does. It's possible it has low fuel pressure if they (whoever) had to jack up the MAF table to get it to run.



Doesn't matter what cam you put in it. That won't require you to need to raise the MAF table the way it is/was.

Ok, I will try this, Thank You

[gtstorey]

Does anyone have a good working tune for that cam setup that they could send over? I don't have the stock tune either. The tune I posted earlier is the "main" tune I have.

Only mods I was told besides the cam is 241 heads, pac 1219 valve springs, LS9 gaskets, Cloyes Timing set, and Borla Stype axel back exhaust.

Wishful thinking, fingers crossed

You need to do do an inventory (part #s) of underhood parts and sensors and check fuel pressure. Then check to determine what parts are stock/non-stock.

[2xLS1]

Here is a stock 01 Vette file with all the same segments as yours. I would load it as a compare file, copy over all the differences and start over.

[Army01Vette]

Here is a stock 01 Vette file with all the same segments as yours. I would load it as a compare file, copy over all the differences and start over.

Thank you, this will definitely help

[Army01Vette]

VE isn't proper, This is hard to describe but as someone who does this often you'll know the shape when you seee it. I'd suggest using a wideband in addition with the stock narrow bands to get the VE table correct. Note your tune isn't in speed density at the moment. This might not get along with stock o2's if it truely is the cam you said it is. Close to 230 duration on a 110. It's potentially going to give the narrowbands bad feedback and make the car drive worse

Cranking VE isn't right at all. Someone set it up how GEN 4 + are. it should be close to what is in the main VE table for these.

Since the car is in VE/MAF blended right now.. But favoring the MAF dial in the MAF table for the fuel trims you see now. You are very rich in log. That will cause idle issues, dying,etc.

Also as someone who has done a lot of these.. The MAP doesn't look right for that cam at all. It either has a smaller cam that you think it does or there is a chance the cam is off a tooth. Ever see any crank/cam sensor codes pop up?4

I replied to your post earlier, but for some reason it didn't go through. I have not had any crank/cam sensor codes. Hopefully starting with a fresh stock tune will help out more. I wish I had the cash to get a wideband, but kinda strapped atm. Maybe I'll have some luck and get it driveable while the weather is nice. Thank you for the help

[Alvin]

I replied to a couple other comments, but that post is awaiting approval. It has the cam specs in it.Cam Specs.png

The manifold vacuum at idle is a red flag with this cam. I'd expect 65-70+ and it's in the 50's kpa.

See if any of the other professionals agree.

[abc]

That's one of the reasons I would like to see a log at normal operating temp. They have it idling at over 1000 rpm, that's likely the reason for the lower than normal MAP, it's not idling at normal RPM for a street car and street car cam.

When the RPM comes down to 800 or so, the MAP is between 60 and 70 KPA from what I could tell.

[Army01Vette]

I'm hoping to get to work on it this weekend. Pulling double shifts at work right now. I'm going to add that stock tune and run a log to see what happens. It has to be better than the craziness this person did.


Thank you all for the help