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05-06-2007, 09:14 PM
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#1 | |
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AF Newbie
Join Date: May 2007
Location: charlotte, North Carolina
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Hi! Help! z32 hesitation
My 91 Zed has been running piss poor lately. Feels like its choking and hesitating the worst in the 3-4 rpm range. Couple of issues I know of, but what could it be? Compression test show one cylinder running a little low (%68)? Exhaust leak around the cats? Once it gets above 4,5 rpm its runs a little better, but still rough. Feels the worst when maintaining a set speed. It is a 5spd N/A if that helps. Anyone got any clue about what it could be?
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05-06-2007, 09:24 PM
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#2 | |
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AF Fanatic
 
Join Date: Mar 2004
Location: Kelowna
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Re: Hi! Help! z32 hesitation
have you ran the ecu diagnostic on it?
__________________
 ZedEx Crew Member #61988 300zx turbo 5spd. 3" mandrel exhaust, filter, afco rad, e-fan, poly engine mounts, mbc at 8.5 psi, turboxs rfl-h bov, gutted plenum, etc. blown turbo, under construction.. gt35 coming. |
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05-06-2007, 09:30 PM
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#3 | |
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AF Newbie
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Re: Hi! Help! z32 hesitation
No. I did try to get advanced to run one the other night while I was there, but its past their age limit. Just trying get an idea of what it could be before taking it somewhere. Check Eng light not on either, though I know that doesnt mean its not throwing any codes.
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05-06-2007, 09:35 PM
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#4 | |
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AF Fanatic
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Re: Hi! Help! z32 hesitation
it's not that difficult to run them yourself, especially if you've got a factory service manual
__________________
ZedEx Crew Member #61988 300zx turbo 5spd. 3" mandrel exhaust, filter, afco rad, e-fan, poly engine mounts, mbc at 8.5 psi, turboxs rfl-h bov, gutted plenum, etc. blown turbo, under construction.. gt35 coming. |
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05-06-2007, 10:01 PM
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#5 | |
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AF Newbie
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Re: Hi! Help! z32 hesitation
I guess, but I dont have the equipment. Ive seen software for laptops, but I dont have the cables. Just thinking someone might have had similar problem or an idea if it could be compression or the cats. I read one post of someone having the cats being leaked on by the exhaust (and I have a leak there) causing somewhat similar symptoms. I know its not a science, just looking for some more clues so I can work on it myself. Indeed thanks for the reply and any additional info.
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05-07-2007, 01:14 AM
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#6 | |
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AF Fanatic
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Re: Hi! Help! z32 hesitation
what do you mean the equipment? you need a small flathead screwdriver, and whatever to pull the interior panel off...
__________________
ZedEx Crew Member #61988 300zx turbo 5spd. 3" mandrel exhaust, filter, afco rad, e-fan, poly engine mounts, mbc at 8.5 psi, turboxs rfl-h bov, gutted plenum, etc. blown turbo, under construction.. gt35 coming. |
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05-07-2007, 10:32 PM
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#7 | |
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AF Newbie
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Re: Hi! Help! z32 hesitation
I thought you were refering to a engine diagnostic where you plug in the tool to read thrown codes. I will give the ecu diagnostic a try and post the codes. Thanks!
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05-08-2007, 05:24 PM
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#8 | |
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AF Enthusiast
 Join Date: Aug 2004
Location: Mooresville, North Carolina
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Re: Hi! Help! z32 hesitation
He is refering to the diagnostic..... Nissan was nice enough to make this possible with or without a computer scan tool. All you need is a flat head screwdriver and a flashlight helps. You can look at the FSM (factory Service Manual) On 300ZX.org. Odds are your probly looking at best case, bad plugs, or worst case blown headgasket.
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Finaly got pics of my car....... after I washed it of course.  
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