300ZX (Z31) Forums Dedicated to 84-89 ZCars otherwize known as the Z31's

z31 acceleration issues

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Old Mar 31, 2015 | 09:35 PM
  #1  
vanboy's Avatar
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Joined: Feb 2015
Posts: 3
z31 acceleration issues

Hey all,

I just wanted to getta feel for what the symptoms were for other z car owners when their fuel pump went. Mine currently starts to jerk when it hits 2000rpm and I'm thinking its my pump because I filled it up before I got the issue. Some say it could be my MAF but I doubt it.. Any feed back would be nice.
Old Apr 1, 2015 | 12:35 AM
  #2  
zxguy1986's Avatar
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Joined: Aug 2013
Posts: 1,103
Welcome to ZDriver!

Check out a free factory service manual at XenonZ31 Reference along with other cool docs. Very useful, especially the diagnostic/testing pages in the FSM. Easy to follow.

You don't give model, year, tranny, mileage, etc., so we have a guessing game here. Your fuel pump is not necessarily the problem because they very rarely go bad. Have seen only one bad fuel pump in 28 years. My guess is your problem is elsewhere. Check your FSM for your sensor locations and test them. Your computer (ECCS/ECU) is getting bad or no info from somewhere and is mis-directing your fuel injection/ignition. And please provide a bit more info.

Thanks and welcome!
Old Apr 1, 2015 | 04:59 AM
  #3  
rogerz's Avatar
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Joined: Sep 2006
Posts: 1,415
From: Mill Creek WA
check your fuel pressure
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