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Old 10-03-2008, 09:32 AM
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Please Help
Ok, I have a problem. When I started my 84 na this morning it kinda stumbled when I first started it, it didn't want to idle. After feathering the throttle for a minute or two it idled fine. So I let it warm up for about ten - fifteen minutes and when I go to take off it dies. Every time I hit the throttle even a little bit it dies. I cant even get the car to move. I have never had this problem before. Last night when I drove it, it ran fine. It has all new vaccum lines, I put a new fuel filter on and it didn't help. I tested the fuel pressure at idle and its fine, the fuel pump sounds like its working fine, so I'm stumped. Any kind of help would be greatly appreciated.
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Old 10-03-2008, 10:58 AM
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Check your connection on the MAS Air Flow meter. Make sure it is plugged in good and making good connection.
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Old 10-03-2008, 03:41 PM
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maf is plugged in and connection was cleaned about a month ago. The plug has not been disconnected since.
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Old 10-03-2008, 04:15 PM
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check the TPS amd run the codes, if your really up for it you could also convert to the 87+ EFI system and have a bit less trouble.
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Old 10-03-2008, 05:15 PM
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Question Has Anyone Mentioned The Codes???
I believe hoov100 said "run the codes." Good advice because otherwise you are just guessing...
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Old 10-03-2008, 06:27 PM
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Yeah, I'll try that tommorrow and let you know how it turns out. Thanks so much for everyone's help.
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Old 10-04-2008, 06:46 PM
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So I ran the codes and it came up with 12, which is maf sensor or the wiring for it. So I cleaned the plug again and it didnt help. Luckily I just happened to have a maf sensor from an 85 turbo z31, so I tried it and now it runs fine. The maf sensor from the turbo car should be fine on the na car... right? Also, the ecu came up with a code number 23, but the paper I have doesnt show a code 23, does anyone know what this could be?
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Old 10-04-2008, 07:35 PM
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Cool Here ya' go....
Code 23 = Throttle Position Sensor (TPS)...
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Old 10-04-2008, 10:30 PM
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As far as I'm aware the MAF is the same from all year Z31s Turbo or non-turbo.
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Old 10-05-2008, 02:49 PM
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Originally Posted by johnZboy
Code 23 = Throttle Position Sensor (TPS)...
The page I have says code 43 is the tps. http://z31.com/oboard/archives/view.pl?151 And thanks again for everyone's help. Nevermind, on the page I have its saying 23 is the idle switch, I already knew that was going bad.
Last edited by 84z31nonturbo; 10-05-2008 at 02:54 PM.
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Old 10-05-2008, 03:12 PM
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wow. i didn't believe that the turbo and N/A MAF would be the same so i looked it up and sure enough, Z31 MAF is for all models. i don't see how that can work. i guess stock boost is pretty low for them though.
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Old 10-05-2008, 03:18 PM
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just for future reference, the 87+ ECU's have different codes then the earlier ones, i tried using a FSM from a 85t on my 88t and the codes where completely off.
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Old 10-05-2008, 03:18 PM
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Yeah, lol. Im glad they are the same I dont have the money to go buy a new one. I just happened to have this one here from my 85 turbo parts car.
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Old 10-05-2008, 03:19 PM
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What is FSM?
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Old 10-05-2008, 03:22 PM
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FSM=factory service manual the service manual given to dealers when a car comes out.
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Old 10-05-2008, 03:26 PM
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Ah, I see.
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