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300ZX

A rough engine idle could be caused by a few different things. Misfiring, fuel issues, and engine timing to name a few. The first place I would recommend starting would be the ignition and fuel systems. Have a professional do...

In this case, it sounds like your battery (https://www.yourmechanic.com/services/battery-replacement) or alternator (https://www.yourmechanic.com/services/alternator-replacement) is failing. If you'd like to get this fixed, certified technician, like one from YourMechanic, will be able to diagnose your stalling issue (https://www.yourmechanic.com/services/car-is-stalling-inspection) to determine the exact...

If the spark plug isn't firing, the spark plug gap could possibly be to wide from high mileage. This plug could also be physically damaged or the spark plugs porcelain could be cracked. If the spark plug wires are cut...

Failure to crank, that is no starter motor operation, does not implicate the fuel pump circuit in any way. First, the battery should be load tested (https://www.yourmechanic.com/services/battery-is-dead-inspection) to determine if it is usable. Batteries can "appear" charged but actually be...

Hello, thank you for writing in. It is impossible to tell what kind of repair bills you are looking at without knowing what is actually wrong. Diagnostics are going to start with checking the fuses, and finding out what those...

Hello and thanks for writing in. There are a number of things that can cause the motor to over fuel or run rich. When this happens, it is usually related to things like faulty fuel injectors (https://www.yourmechanic.com/services/fuel-injector-replacement), a failing mass...

Hi There, It sounds like you may have a dirty or failing idle air control valve causing your engine idle to fluctuate and eventually stall. The idle air control valve (https://www.yourmechanic.com/services/idle-control-valve-replacement) is a small valve on the engine's intake system...

Hello There, Unfortunately, it sounds like your car may have had some catastrophic damage due to running it without any oil. Depending on how long and how low the oil levels were when you drove it prior to it shutting...

Hello - I suspect your cold start system (https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-cold-start-injector) has gone "full on" or you have leaking injectors. Without question your fuel system is pumping way too much fuel into the intake, leaking past the piston rings, and entering the...

The cylinder heads are one part of the complete engine package. As such, when they are rebuilt, other critical components such as connecting rods, bearings, pistons and cylinder sleeves are not replaced. If your head gasket broke, causing water to...

Hi there. Typically when an individual gear is hard to shift into with a manual transmission, it's an internal gear failure inside the transmission case or linkage issue. When all gears are hard to shift, it's likely the clutch. Since...

Hi Robert. We understood your inquiry correctly the first time you submitted the question. The truth is that without completing an onsite inspection, telling you the exact reason why you are not getting third or fourth gear to shift is...

Try to hold your throttle about 1/4 and see if it starts and then slowly return throttle to idle so computer will relearn idle again. If this does not help then you will need further diagnosis by a mechanic like...

Claimed by John Hege

Claimed by John Hege

Hello, we will be happy to help. I'm curious to know why the guy told you that you needed a new oxygen sensor and fuel pump. I wonder if the oxygen sensors were exhibiting that of lean conditions. If the...

Hi there. Check the slave cylinder and see if its moving. There could be a leak on the slave cylinder causing the slave cylinder not to operate. Also, check the pin to the clutch pedal and make sure that it...

You didn't say weather you had a "rough landing." If in the process of spinning you ran over some debris or maybe a curb, you could have damaged your oil pan and lost your oil. If you haven't already looked...

Replacing the upper control arm (https://www.yourmechanic.com/services/control-arm-assembly-replacement) on your vehicle may permit camber adjustment. But first, look for cam-style bolts or another adjusting mechanism. Of course, check to see if the factory preferred camber setting (probably slightly negative, maybe 0.5 to...

This may be a sign of a failing idle air control valve (https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-idle-control-valve). The idle air control valve is located on or near your intake manifold that monitors the air intake as it is mixed with fuel prior to being...