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Shorter push rods no misfire
BUT, what is the issue with low vacuum?

Idle around in Neutral is 45-50 KPA
Idle in gear 65-70 KPA

Update:

Turned out to be a cylinder issue, leak down test showed leak in cylinder 1 and 7.

Soo,,,

I am not sure if there is anything wrong or not.

Car currently has 60 lb/hr injectors & fixed the injector data.
Also, it has 6.1 intake manifold.

Why: it will be boosted within two...

Dial in your VE at idle,

I've dropped it by 20 for the car am working on now which is running BTR stage 2 VVT cam.

Go to the torque model and then to friction loss table and bump up the...

Update:

Car starts perfect now, idles great

The change was in Start up injectors PW Scalar.

The wideband says my AFR are dialed in almost at 14.7 more or less
LTFT and STFT are in range for during idle.
LTFT is around -3 and STFT is zero.d

Car has higher compression ratio its around...

Will do, thanks for the input..

Fir cammed hemi i usual take 10-15% off of start up fuel and it always works, so correct me if am wrong

So, Car runs but not great. Throttle response is amazing, idles rough a bit I am thinking its because of the cam

AFR at idle shows 14.5-15.0 using a wide band

My main concern now is it takes...

Update:

Brand new TCM (AC delco) not refurbished.

I pulled the file out of the old TCM.
Write entire into the new TCM.

Wallaaa, everything works and shifts properly.

Thanks for the file, I was about to use the hellcat scaling as they go all the way up to 6500.

once the car is done we'll flash the file and get it dialed in further. I'll keep this post updated...

That will be very helpful.

The cam just got delivered, I noticed that BTR recommends a total of 8 degree retard from 5500 RPM and higher for this cam.

But it seems weird that they want 8...

HP tuners should wake up, Toyota market is rocketing up.

Here comes my concerns here
1) There is no 7000 rpm range on the table as they max out at around 6000 rpms.
2) To me knowledge and based on what i've read, Advancing the exhaust cam degree is...

So attached is the stock file and the file I made just to get it started properly.

Am new to VVT things so I this might be a stupid question,

What affect does advancing or retarding the VVT...

I'll give that a shot and I'll upload the file here just to confirm if my changes correct.



The engine builders does!

Hi,

So a good friend of mine and I are bulding his 2015 Charger R/T 5.7
The car will have forged pistons and rods (Manley) Stock bore, stroke and crank (will be booster at later stages)...

Exactly, I am on the verge of getting the VF Tuner so i can start tuning toyotas properly.
But on the same hand, i love HPTuners TBH and they should do something about it. Thesse engines and...

Reviving an old thead.

Dear HPTuners, Any updates.. Many people contact me to do a custom tune for FJ's here in the GCC as it was not discontinued until 2023 (Last model year in the middle east)...

Hi,

I am about to get a 2008 hummer H2 sut.

The truck needs a new TCM as it has several faults related to fluid pressure and shift solenoid.

My question is, is it as simple as writing the...

Anyone!!??
It's a Mercedes ECU so i guess there are guys out there who can help out.

Hi,

So its the first time i do a tune for infiniti's thankfully this guy is my friend.
I am trying to make the car rev limit hard like what we usually do on LS & any other platform. I tried...

Facing the same problem..

Anyone??

Hi,

The emissions control codes are grayed out and cannot be changed.
Is there anyway to fix that??126483

The camshaft was out of a Gen 3 5.3 truck. No DoD, AFM or VVT

I actually tried that and it didn't work. I copied what ever I could from a gen 3 to gen 4 E38 but again nothing.

The issue is there only in idle ince you rev it up misfire. Once the rpm drops...