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QX4

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Question
gears not moving into next gear smoothly while accelerating, check engine light on daily
There are a few common causes of the transmission shifting like this. They include the transmission fluid level being low, transmission shift solenoid, or the transmission torque converter. Any of these can cause harsh shifting that can be intermittent. I...
Question
idles rough after heavy acceleration, going up hill, getting off freeway, weak warm start ups
The most common cause of this is either a charging system issue, such as the alternator or battery, or low fuel pressure from a clogged line or failing fuel pump. Either the charging system or the fuel system can have...
Question
Q: Possible electrical issue
This sounds as though you are having multiple problems that would need to be addressed. The broken latch may be the cause of the dead battery, but not the Check Engine Light illumination, or the radio not working; the radio...
Question
Car vibrates and sways back and forth.
There may be a bad component in your suspension that has worn out and is causing the vibration and swaying you're experiencing. There could be various problems at fault here, I recommend having your vehicle examined by a certified mechanic...
Question
Q: P0171
The code P0171 is due to the left bank of the engine running lean and has reached the rich limit for the ECM. Try to have the injectors cleaned and run only high quality fuel that has cleaning additives. This...
Question
My car ran out of gas and now it won't start - 2001 Infiniti QX4
When you ran the fuel pump dry of fuel, the fuel pump may have seized up. Fuel pumps use the fuel in the tank to keep it cool so it does not overheat and also lubricates the internal parts as...
Question
Where is the Crankshaft Position Indicator on a 1998 Infiniti QX4?
The crankshaft position sensor is typically externally mounted on the engine near the crankshaft pulley. I would recommend checking near the crankshaft pulley for this answer. If you need help with the replacement of the crankshaft position sensor, I recommend...
Question
Car wont turn over battery is good
It sounds like you may be having an issue with your starter. I would recommend having your starter professionally tested with a digital multimeter. This test will determine if battery power is reaching the starter. If battery power is reaching...
Question
Fuel pump was replaced but it is still not working.
Hello. If the fuel pump is not coming on, and the fuse and relay are good, then it may be possible that there is a problem with the pump or the fuel pump circuit. The first thing I would do...
Question
Car wont start or turn over battery is good
Hi there. In most cases, when you crank over the vehicle but it doesn't start, it's caused by one of three items. First, the sequence the technician recommended was to attempt to clear an error code that disables the ignition...
Question
I have a1999 infiniti qx4 v6 . Trouble code p0180 comes up and p0180 pd. I replaced the sending unit. Still won't start.
The trouble code P0180 could be related to the no start condition if the fuel is frozen from extreme cold or if there is water in the fuel. Also, if the fuel gets too hot and vaporizes, that can cause...
Question
My 1997 infinity qx4 3300 will not shift into 3rd gear it just drives at a high RPM's the faster I go the higher the RPM goes
Hi there. In most cases, when a transmission will not shift into higher gears, it's due to transmission fluid problem; either it's obstructed in the hydraulic lines, a torque converter issue or inner seal that is damaged. I'm not quite...
Question
I Have a 2001 Infiniti QX4 and every time as soon as I start the car my AC blower’s start blowing air even when my AC screen is of
You may have a bad blower control amplifier and should try to replace it first. If still have issues then the main control panel may be having issues and can be tested with a scanner for failure codes and then...
Question
I Have a 2001 Infiniti QX4 and every time as soon as I start the car my AC blower’s start blowing air even when my AC screen is of
It is hard to say if the A/C blower stuck on and the dash malfunction/engine shutdown are related but they are both a consequence of electrical problems. The stuck-on blower is easy to diagnose as all you need do is...
Question
Why do my 2002 infiniti temperture rise quickly once started i've changed the thermostat,and the fan @clutch
Hello, and thank you for writing in. With the repairs that you have already made, you may want to turn your attention to the water pump and the radiator. Make sure after the fan clutch replacement that the fans are...
Question
Overheating, no leaks, replaced thermostat, fan clutch, radiator.
The water pump is a possibility although when water pumps fail they usually leak or make noise. It is more likely that there is a restriction of some kind in the cooling system. Since the radiator has been replaced, the...
Question
We've been having issues with our 97 Infiniti QX4. After everything, it still won't start.
Hi there. In most cases, when a car won't start it breaks down in two specific areas. First, the engine is not getting enough or the correction ratio of air and fuel mixture or second, the engine can't ignite this...
Question
Engine rpm drops at idle every few minutes. Codes for both system too lean and system too rich have been generated.
The possible causes of what you describe include include vacuum leaks and EGR system faults, a faulty idle air control (IAC) valve or circuit, faults in the fuel pump control circuit or fuel pressure regulation, defective spark plug(s) or ignition...
Question
Positive long term fuel trim.
The fuel trim numbers mean that the fuel is leaned out. If the number is at 0, then there is no change. If the numbers go to a positive increase, then the fuel system is leaning out. If the numbers...
Question
How many crankshaft position sensor are there? 2002 Infiniti QX4
Hello - there is only 1 crankshaft position sensor on this engine. It is located on top of the transmission bellhousing at the rear of the engine (driver side). For assistance, I recommend a crankshaft position sensor replacement performed by...

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