Recent content by Quadstar Tuning LLC

The Fluidampr is not a fix for imbalance, a common misconception. It is a device that protects against a wider range of harmful harmonics than a factory balancer does. Harmonics are created regardless of how the rotating assembly is balanced. If you balanced a factory build, haven't increased...

There's a huge market gap for pumps, get on it and keep some trucks on the road! If you knew diddly squat about us personally then you'd know we'd actually praise you for starting a fuel shop if that's the case. Big fuel shops are dropping like flies or want to focus on newer more profitable...

It's just a cost vs benefit deal. Close it in if you wish, we don't.

It's called knowing how to run a business without a Chinese factory being able to read a forum post and pump it out for a fraction of the price. It's been successful and the handful of people with your mentality that we've had to leave behind doesn't keep us up at night. Anyone who wants a...

The amount this platform fights itself is amazing. If you don't have a clue how to make a DS4 truck run well, just throw insults... We are used to it 😅. Anyways, about the nozzles this post was for. They are readily available just shoot us a message on here.

You think you have it all figured out still. But you are all talk and no truck.

Marines are all we run on fun builds. Consistently putting down over 400 hp on numerous trucks that are also logging over 20mpg. An injection pump with a brain and a short duration pulse is fun.

We can supply Bosch (straight from the horse's mouth) 311 Marine nozzles by request. $45 each.

If it was stuck in learn mode then you should be able to bump it out by unplugging the CTS sensor because the computer then would think the coolant temp is no longer above 170*F. This is a quick way to test your hypothesis. It should throw a TDCO out of range code if the pump needed moved. In...

We put the pressure tap back at our fuel filter re-locations since the reverberation pulses back thru the supply line on the DS4 pump can kill gauges and electronic transducers. Be mindful of that if this goes directly on the injection pump inlet.

Stock turbos do make that "tinking" sound in the exhaust housing. There's different NVH (noise vibration harshness) features built into it that cause that sound but reduce other bad sounds like vibrations and resonance thru the intake system. is worth mentioning in case you want to try and fix...

It has our Super 60 turbo and 6L90 transmission swap

Where do we fit into your list? o_O

We replied to your message, thanks!

Have you tried another PCM yet? That'd be a lot easier than some other options to look at first. We've also had a couple that refuse to time properly or have errors like this so what we do is swap in a PCM from another truck that already has TDCO set on it. This prevents it from hunting for a...