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300ZX

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Question
Battery sparking
Hi There, This may sound a bit like stating the obvious, but this happens all too frequently even with some very technically able mechanics; check to be sure the positive cable is connected to the positive terminal and negative to...
Question
Would radiator flush clean out the heatercor
The heater core may get a little cleaned if you use a flush and hold the rpms at about 1000 for 5 minutes with the heat on. If the heater core is completely clogged then you may not get any...
Question
My car idles poorly and loses power when I accelerate
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 is a small valve on the engine's intake system that...
Question
Half of my sparks aren't working.
Hi there. If the engine is running rough and it is not firing on the three cylinders, then either the spark plug wire has too much resistance or the spark plug is fouled out. Put a spark plug tester on...
Question
Ran car with no oil, car stopped on hwy what to do now?
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...
Question
My car won't start and has a new starter
Hi There, It sounds like you may have a weak battery or potentially a faulty starter relay or ignition switch. The starter relay directs power from the battery to the starter solenoid which then engages the starter when you turn...
Question
Clutch won't work and the clutch pedal has no pressure.
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...
Question
Why does my Nissan 300zx lose power?
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...
Question
Transmission Grind
This may suggest failing transmission synchros. As you may know, when a clutch drags, it is not letting go of the disk fully which overloads the synchros and burns up the friction surfaces quickly. Synchros work by speeding up or...
Question
Idles fine and works fine when first starts cold then sputters and feels like horrible misfire when hot and idles low
Hi There, What you are describing sounds like an ignition coil pack that may be failing. Ignition coils are prone to this type of erratic functioning or heat cycling when they are beginning to fail due to the temperature fluctuations...
Question
electrical or something i dont know.
Hi there. To be completely honest, we're not quite clear as to what issues you are experiencing based on your input. One thing we were able to pick up on was the acceleration problems you described. This is typically caused...
Question
Dash lights along with fog lights and ceiling lights don't work
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...
Question
My car starts fine but always like once a month it doesn't start it cranks ok but it will not start if I let it sit for 6 hours
Hi There, What you are describing sounds like an ignition coil that may be failing. Ignition coils are prone to this type of erratic functioning or heat cycling when they are beginning to fail due to the temperature fluctuations under...
Question
No 3rd or 4th gears
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...
Question
I have no 3rd or 4th gears
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...
Question
I have rotated my engine by hand for several minutes and still can't find TDC. My car running fine I only changed my water pump.
You should replace the timing belt if it got wet with coolant or it will fail prematurely. The timing marks shown here will align only every two revolutions of the crankshaft.
Question
My 1985 300zx is taking 2 to 3 hours to crank after u take the battery out and put another battery in.
This may be a sign of a faulty ignition coil. Ignition coils are coated with a varnish-like insulation that becomes brittle over time after being stretched then contracted repeatedly. The insulation develops small fractures that open when heated and close...
Question
Lack of power 1991 Nissan 300ZX
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, a failing mass air...

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