No engine noise but no power and backfire.
11-18-2014, 10:16 AM
#1
Registered User
Thread Starter
Join Date: Nov 2014
Posts: 12
No engine noise but no power and backfire.
Just bought an 88 300zx M/T N/A. I drove it home but it has very little power. My 3 cyl metro has more power. The engine sounds fine, no chatter or anything of the like. It idles fine too. If revved it backfires. I changed plugs, wires, cap, and rotor, but no change. any ideas?
11-18-2014, 01:37 PM
#4
Registered User
Thread Starter
Join Date: Nov 2014
Posts: 12
Checked codes. The ECU threw 13 and 42. Fuel temp sensor and cylinder head temp sensor. Im gonna just replace the chts but I cant find anything on the fuel temp sensor. I just called the local Nissan dealership and they didnt either. I'm still gonna check the timing on my next off day. Hopefully I'll make a breakthrough.
11-21-2014, 03:53 PM
#8
Registered User
Join Date: Feb 2002
Location: Saskatoon, SK
Posts: 2,893
Motorsport! Temperature Sensor, Cylinder Head, 84-89 300ZX - The Z Store! Nissan-Datsun 240Z-260Z-280Z-280ZX-300ZX(Z31/Z32)-350Z-370Z Parts
https://conceptzperformance.com/Cart...ion.php?II=591 <--- its the same unit for z31's, same part #.
I guess to edit, sensors do go bad, but sometimes the wiring is in worse shape than the sensor, check the connections clean them, etc.
https://conceptzperformance.com/Cart...ion.php?II=591 <--- its the same unit for z31's, same part #.
I guess to edit, sensors do go bad, but sometimes the wiring is in worse shape than the sensor, check the connections clean them, etc.
Last edited by Skully; 11-21-2014 at 04:17 PM.
11-23-2014, 11:20 PM
#9
Registered User
Thread Starter
Join Date: Nov 2014
Posts: 12
Whoever worked on the car before me did a bang-up job on the wiring, so I'm gonna have to go through all that anyway, so I'll be sure to check all that. I've done some more research and I think I'm gonna replace the ignition coil and see if that helps. I'm to the point where I expect something new every time I pop the hood. I mean, the headlights are spliced together (poorly), the EGR line has a hole that's patched with a hose clamp with a piece of a diet coke can, the airflow adjustment screw was closed, and the cat is busted hollow. What next? lol
11-24-2014, 12:57 AM
#11
Registered User
Join Date: Aug 2013
Posts: 1,103
You got the factory service manual at XenonZ31 Reference right? It's a freebie DL. Other docs there too. Check'em out.
Don't worry about your Z. You will get it running. You're just filling in for the regular maintenance previous owners didn't give it. Z31s are magic.
Don't worry about your Z. You will get it running. You're just filling in for the regular maintenance previous owners didn't give it. Z31s are magic.
Last edited by zxguy1986; 11-24-2014 at 12:59 AM.
11-24-2014, 01:17 PM
#12
Registered User
Thread Starter
Join Date: Nov 2014
Posts: 12
Yeah. Its a solid machine. Like you said, I just have to make up for all the neglect. Its gonna be killer when I'm done. I'm more of a body guy, so once I get it operating correctly I can really get into it. Ive always wanted a Z and this is my first, so its gonna be my baby.
12-03-2014, 12:22 PM
#18
Registered User
Join Date: Aug 2013
Posts: 1,103
Yep, the sensors are notorious on Z31s. CHTS especially. I would use my multimeter to check the 2 solenoids on the air regulator too.
The wiring? After 26 years, connectors get corroded and grimy, will just disconnect on their own one day and make you crazy. When you get the time, go through all your harness connections in the engine bay and disconnect them, spray/squirt clean them and reconnect. That baby wants to run right! You will see. It's a Z31
The wiring? After 26 years, connectors get corroded and grimy, will just disconnect on their own one day and make you crazy. When you get the time, go through all your harness connections in the engine bay and disconnect them, spray/squirt clean them and reconnect. That baby wants to run right! You will see. It's a Z31
Thread
Thread Starter
Forum
Replies
Last Post
Bookmarks
