Last post on Sep 29, 2013 at 5:30 PM
You are in the Nissan 300ZX
What is this discussion about?
Nissan 300ZX, Coupe, Convertible
#3 of 9 Multiple Issues 86GS
Jun 03, 2009 (7:08 am)
Is your Engine an E or an ET?
#4 of 9 Re: Multiple Issues [pauld5]
Jun 03, 2009 (7:23 am)
Issue re: missing and no idle when cold is possibly the Coolant Temp Sensor according to what someone on another site told me. I looked up what it does and it makes sense. This sensor sends a signal to the cpu about the temp of the head/coolant which in turn regulates fuel. I ordered one for like $25 but haven't installed it yet.
Tranny issue...had a mechanic take it for a spin and it's definitely something bad in the tranny. It whines when sitting still in neutral or moving in most gears but especially 2nd. Mechanic said the main bearings in the tranny are worn (specifically he indicated main input shaft bearing) allowing the gears to slip apart causing the loud crack/bang noise. I ordered a tranny rebuild kit for $135.
Final issue re: thump in rear end upon quick accel/decel or over rough road is some bushings up under the rear.
Found all the answers to my questions at the following site: www.300zxclub.com
Go to the "Frequently Asked Questions" section for some great information as well as there's a thread in that FAQ section entitled "Repair and info sites" with 9 other sites listed with great information. One great site on that list is http://www.xenonz31.com/index.html
#5 of 9 Re: Multiple Issues 86GS [pauld5]
Jun 03, 2009 (7:23 am)
I haven't a clue whether it's an E or ET.
#6 of 9 Re: NISSAN 300ZX Multiple Issues [86_gas_saver]
Jun 08, 2009 (11:44 am)
1) Coolant temp, TPS, and/or MAFS
2)Pilot bearing, input shaft bearing, ring gear, or a host of other bearings. Used tranny is cheap, and rebuilds can be messed up easy
3)99 percent chance it's the subframe bushings. The entire rear subframe sits on a few bushings. The front ones tend to go leaving a lot of movement and a metal to metal clunk
#7 of 9 Re: NISSAN 300ZX Multiple Issues [turnten]
Jun 15, 2009 (11:27 pm)
On the radiator there is a sensor that tells the Electronic control unit (ECU) when to turn the fan on and off? Or when to adjust? You have to locate. Trottle Position Sensor (TPS) Located on the trottle air intake near the Trottle cables i.e. one for the gas peddle and one for the choke. A little square black b plastic ox 2"x1.5"x 0.5" Replace but don't turn the new unit axil on installing, will damage. Last the Main Air Flow Sensor (MAFS) this is after the air cleaner filter follow the air line 3" dia. until you find the fixed box with black plastic top. Terrible too replace, good luck:?
#8 of 9 Re: NISSAN 300ZX Multiple Issues [86_gas_saver]
Aug 06, 2009 (3:38 am)
Regarding the thump in rear end. Check your Body mounts. There is a rubber bushing or shim. mine was rotted out, replaced it with a chunk of hard rubber about 1/2 the size of a hockey puck. The problem went away and it took about 1/2 hour to do.
#9 of 9 Trouble shoot starting and stalling 1990 nissan 300zx.
Sep 29, 2013 (5:30 pm)
I have 1990 300zx,when I accelerate hard it hesitate and and shutoff.after it sit for awhile,it will startup.Not sure what the problem or problems could be.