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Case Studies – Upgrading injectors in a VQ35

We will be upgrading the injectors on a 350Z drift missle for the upcoming Open Track event, and slapping in a set of 600cc Deatschwerks injectors. These injectors are a direct fit, and as they are customized for each car there is no need to fiddle with inline resistors for those wanting to move from high or low impedence.

The part number in question is 21S-05-0600-6and you will need an adjustible fuel pressure regulator if you don’t want to trip the good ‘ol P0175 OBDII System Too Rich check engine light.

To begin, remove your stock intake snorkel and disconnect all electrical sensors from the intake plenum and throttle body area

Now remove the lower 10mm bolts that hold the upper half of the intake manifold in place, and undo the 10mm bolts that hold the upper plenum to the lower half.

Make sure to use the sequence in the diagram below whenever removing or putting the stock intake manifold back in place

With the intake manifold removed, you can now access the fuel rail and injectors. Open your gas cap and undo the factory gas cap to relieve any pressure from the system. Disconnect your battery, as gas and gas fumes will be prevalent and then undo your factory fuel return.

Undo the clips to the injectors, and pull gently to remove the entire fuel rail assembly. The picture above shows that I have not clogged the intake ports to the engine, because I am incredibly overconfident in myself. In reality however, it’s a prudent idea to block these intake ports as you don’t want any isolators or nuts falling into your motor.

With the factory rail removed, you can now install the upgraded units with relative ease. Make sure not to rip or tear the oring isolators, and make sure not to lose any of the isolators that space out the rail from the heads.

Now may be a good time to install a intake manifold spacer, like this BLOX one. This car will be getting a new intake manifold in anticipation of….

BOOST!!!!

Next up, mocking up the turbo manifolds and wastegate locales before deciding on what engine management.

Happy boosting!

Case Studies : How to fix the P0345 OBDII error in a 2006 Infiniti G35

My 2006 Infiniti G35 Sedan has served me quite well for a number of years, and despite it’s high mileage, been an excellent car for most of it’s life.

With over 200k on the odometer, I guess I cannot fault the Infiniti for acting up recently but I’ve had a difficult time diagnosing it’s current issue. It doesn’t happen all the time, but when warm, the car begins to sputter and misfire and occasionally lurches off idle or with  slight acceleration.

After which time, the check engine light never seemed to light off, but the VCD and ABS lights would stay lit after the car would sputter. After wrongly assuming it was coil related I started testing them, until the car finally threw a code so that I could diagnose it.

And lo and behold, it’s the good ol P0345 OBDII error – P0345 Camshaft Position Sensor Failure A Circuit Bank 2 ; this code indicates that a problem was detected in the camshaft position sensor circuit of bank 2 ( which is the driver side of your VQ35DE).

The steps to diagnose your P0345 code in your G35 ( or any car for that matter )

Read the rest of the article by clicking here.