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Q45

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Question
Car stopped three times in one day
Hi. If the code is still present after both sensors have been replaced, and the engine is stalling, further diagnostics is needed. First of all, a new sensor doesn’t always mean a good sensor, especially aftermarket ones. Check the sensor...
Question
Car has rough idling, occasionally seems it would stall
Hello. Replacing the fuel injectors will not cause this. If it only stalls at idle, I would clean the throttle body first. If it is dirty, then this will occur. If it is fine, then it may be an air...
Question
Car misifires under load, P0300 code
Hello. The P0300 code refers to a detection of a misfire in one of the cylinders. If the car idles fine and only acts up during acceleration with this code coming up, then it is usually caused by a fuel...
Question
The new ignition is locked, cannot turn over
Hello. When you install a new ignition and a new computer, it needs to be reprogrammed to communicate correctly. This can usually only be done at the dealer. If they are not programmed correctly then the computers will not communicate...
Question
Q: Check engine light stays on
Hello. In order to know why the light is on, I would need to know the codes from the computer. It can be anything for a computer issue to a bad gas cap. I usually scan the computer first to...
Question
Q: Car dies
There could be quite a few things that can cause this. Reading out faults from the engine computer will be key to guiding the diagnosis in the right direction. Depending on when the stalling occurs -- at idle, part load,...
Question
Replaced alternator but still not sending power to the battery.
Hello. If your engine is able to crank all the time and will not just start, the issue is not in the battery or the alternator. A good battery charge is required in order to even get the starter to...
Question
What else can cause a shake/vibration/shimmey?
Hello. Although you mention that you have new tires, there are instances where the construction of the tire is such that it will vibrate no matter how well it "appears" to be dynamically balanced. This is based on what...
Question
Getting to cylinder #3 to replace ignition coil?
I could go into a long drawn out direction to remove the coils on the engine but if you go on google and put in "2002 Infiniti q45 #3 coil removal" in the search bar you will see many good...
Question
I have a loss of power when acceleration the car does not drive pass 10 or 15mph I change the plugs and also change the fuel filte
This may be result of a failing or dirty mass airflow sensor. This is a unit that is responsible for regulating the air flow into the engine as it is mixed with fuel prior to being injected into the motor....
Question
I have a 1996 infinity Q45 and the ECM (computer) isn't working. I've been looking on the internet to find a new one.
Hi there. When looking for an ECM (computer) for your vehicle, as long as the computer is the same design and has the same harness connections it will adapt to your vehicle. The only thing is, you will have to...
Question
Gas leaking in tailpipe. Changed fuel pump, fuel filter, and oil. Still leaks. My next move is to replace the fuel regulator. Can you fix this?
Hi there. If the fuel is dumping into the exhaust pipe, then there is either a burned valve and the gas is not burning in a cylinder or one or more fuel injectors are leaking. If you need further assistance...
Question
After replacing my camshaft position sensor I have abs, slip and vdc off lights on. Could it be a bad camshaft sensor * 02 q45
Hi Travis. If you have multiple electrical warning lights on the dashboard after completing a camshaft position sensor replacement, and the battery terminals were not removed - it's likely that these warning lights are triggered by an electrical short. It's...
Question
how many catalytic converters do it have
Your vehicle has two catalytic converters. These two converters are assembled, along with a muffler and some pipe, as one integral piece. The OEM Infiniti part number, if you require replacement of these converters, is 20020-CR91A. If you do a...
Question
When I turn off the car, power steering fluid over-flows from under the reservoir cap. 1999 Infiniti Q45
Hello - it sound like your power steering system has been over-filled with fluid, perhaps the wrong fluid was used (non-synthetic) and is foaming, or the fluid filter (in the reservoir) is clogged. I recommend a PS fluid service performed...
Question
Slight vibration from accel pedal
Vibration that is in the floor area and/or the accelerator pedal, but not felt through the steering wheel, could be due to a rear axle (tire/wheel) balance issue including even faulty struts. It is also possible for the vibration to...
Question
While driving, car power steering stopped working. It got tight. Brakes,gas stopped working. 4 way flashers lights started blinkin
This is an electrical malfunction and is what is referred to as a "global" malfunction. That means a principal circuit, or circuits, was interrupted obviously on an intermittent basis. Battery terminal corrosion is possibly implicated at least as a contributing...

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