I have a whining sound coming gfrom the fuel pump , no lights work, ignition doesnt light up or work but the power windows work, the over load circut burned thru the wire any idea whats causing the fault? the car hasnt been started for 2 years.
Very helpful video thank you! I know it’s a bit older of a vid now but I’m having issues with my distributor on my base ‘87, it’s been leaking and causing smoke from the hot engine, I’ve been thinking about replacing the whole thing with a new crank sensor and all but also want to check the connecting plugs first, I’ve pulled them off before but didn’t really know what I was looking for. Does my z31 have to be on and running to check the sparks on the 6 plugs? Any help you can give me is much appreciated, thanks.
Run the engine and pull the plug wires at the distributor 1 at a time.. you’ll see and or feel the spark lol that same test can also diagnose dead or low compression cylinders
My car idles well runs good when pass 3k rpm but runs little rough lower rpms and causes car to feel like its lunging when accelerating and going thru the lower rpms until you get above 3k rpm then smooths out. Any suggestions?
Fuel pressure regulator most likely but could also be fuel temp sensor on the fuel regulator and or cylinder head temp sensor which might keep it in cold mode if it’s staying in cold start mode
I recently bought a 1985 na z31. It runs rough but after seeing this I’ll start replacing things one by one but my main problem is that my car won’t pass 60mph. Not only that but it struggles to get to 60. Any idea what may cause this. Thanks!
They're normally called blowers resistors, that's what controls the speed to your blower fan ... you may try searching for "z31 blower resistor" or something along that.
What if I have spark and fuel and I did the timing and ignition timing I checked those multiple times and it just wont start I did the tensioner timed the engine and it kinda ran if you kept the pedal floored as soon as I fixed the intake tube replaced the tube close to the intake it wouldn't start
Also check for vacuum leaks. Mine would try to start but die right away. I left a hose unplugged. Try unplugging your maf sensor and see if that changes anything. If it starts with maf unplugged it might just be a big vacuum leak
@FleetTech97 Can you elaborate more where the vacuum leak could be coming from that caused it for you? I've replaced so much after my car hasn't been running and like you called out, I did discover the car runs with the maf unplugged. Next is to check for a vacuum leaked but want to know what and where it did it to yours
@@HappyHardcore86 LOL it was 5 years ago so i cant remeber really i do miss that car as far as that engine though i junked the vg30 and i put in an lm7 5.3 v8 with a rs5r30a 5 speed from a z32 and it was an awesome car
As mentioned to John Rodrigo, they're normally called blower resistors. You may have to end up sourcing a used one, one from a different make/mode, or retrofit a resistor of your own.
became an owner of an 88 300zx. This will be super helpful for future reference, thanks!
Great video! The CAS, MAF and CHTS are the most critical sensors for these cars.
Bloody hell mate, that’s a damn good guide!
I have a whining sound coming gfrom the fuel pump , no lights work, ignition doesnt light up or work but the power windows work, the over load circut burned thru the wire any idea whats causing the fault? the car hasnt been started for 2 years.
Fuel filter relay? You mean fuel pump relay?
Thanks! Really appreciate it
How much do you reckon you've spent on parts/service
Very helpful video thank you! I know it’s a bit older of a vid now but I’m having issues with my distributor on my base ‘87, it’s been leaking and causing smoke from the hot engine, I’ve been thinking about replacing the whole thing with a new crank sensor and all but also want to check the connecting plugs first, I’ve pulled them off before but didn’t really know what I was looking for. Does my z31 have to be on and running to check the sparks on the 6 plugs? Any help you can give me is much appreciated, thanks.
Run the engine and pull the plug wires at the distributor 1 at a time.. you’ll see and or feel the spark lol that same test can also diagnose dead or low compression cylinders
My car idles well runs good when pass 3k rpm but runs little rough lower rpms and causes car to feel like its lunging when accelerating and going thru the lower rpms until you get above 3k rpm then smooths out. Any suggestions?
My 88 is doing that right now will be hard to start then idle after giving a little gas then will jerk and jump when accelerating
Fuel pressure regulator most likely but could also be fuel temp sensor on the fuel regulator and or cylinder head temp sensor which might keep it in cold mode if it’s staying in cold start mode
I recently bought a 1985 na z31. It runs rough but after seeing this I’ll start replacing things one by one but my main problem is that my car won’t pass 60mph. Not only that but it struggles to get to 60. Any idea what may cause this. Thanks!
Sounds like a head gasket 😬 did you get it figured out
Check the flow meter
Whats the name of the A/C Heater power supply ? I'm having the dame problem ... thanks
They're normally called blowers resistors, that's what controls the speed to your blower fan ... you may try searching for "z31 blower resistor" or something along that.
What if I have spark and fuel and I did the timing and ignition timing I checked those multiple times and it just wont start I did the tensioner timed the engine and it kinda ran if you kept the pedal floored as soon as I fixed the intake tube replaced the tube close to the intake it wouldn't start
Make sure all injectors are working/firing ... a lot of times the injectors stay stuck open/closed, or simply stop working due to age.
Also check for vacuum leaks. Mine would try to start but die right away. I left a hose unplugged.
Try unplugging your maf sensor and see if that changes anything. If it starts with maf unplugged it might just be a big vacuum leak
@FleetTech97 Can you elaborate more where the vacuum leak could be coming from that caused it for you? I've replaced so much after my car hasn't been running and like you called out, I did discover the car runs with the maf unplugged. Next is to check for a vacuum leaked but want to know what and where it did it to yours
@@HappyHardcore86 LOL it was 5 years ago so i cant remeber really i do miss that car as far as that engine though i junked the vg30 and i put in an lm7 5.3 v8 with a rs5r30a 5 speed from a z32 and it was an awesome car
Car will only start with accelerator pressed in and even then runs rough. Won’t idle. Any ideas?
Did you fix it yet
Mine was like that I changed the chts without changing the connector now it won't start at all
Security light is flashing on my 85 no 300zx. The car cranks but won't start. Does anyone know a fix for this?
I'm having the same issue. I still have no clue how to fix this
Security light is just to say if the door, hood, or truck is open
Sounds like something wasn't closed properly and your battery is dead.
I just bought a 300ZX it starts idles but soon as I give it gas it dies any ideas
Unpug your maf and see if it will rev up
I have the same problem with mine. Change distributor cam rotor CAS and still have the same problem.
Sick man thank you
Do you have a link to where one could get that A/C Fan Controller? I have an 85 and it is having that issue.
As mentioned to John Rodrigo, they're normally called blower resistors. You may have to end up sourcing a used one, one from a different make/mode, or retrofit a resistor of your own.
Dont buy a used maf - get it remanned - Ur just buying a used part that is 40 years old and is likely crap.
The Author failed to tell that this is a British Version where they drive on the Opposite side of the Road