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#1 |
![]() ![]() Join Date: Nov 2007
Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri
Posts: 6,493
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My "new" 90 Z has been in storage for "several years", and honestly at first it ran (especially at idle) a little rough. I sorta expected that. Earlier I posted some scan results, and a couple of you pointed out some possible issues - one especially that caught my eye too was a possible lazy O2, as the cross counts on that side were quite low.
Well, I've run a couple tanks of fresh BP 93 octane thru it now, with some accelleration being "spirited", and the ol gal seems to like the exercise! I ran a couple of scans yesterday to see how things compared now after 3 weeks (weekends, primarily), and was pleasantly surprised to see all my left/right data is comparatively uniform now; and the cross count graphs of both O2 are nearly identical and very healthy. I'm still experiencing an occational stumble when after cruising at low speed for several minutes. It happens - sometimes misses a heartbeat suddenly - immediately upon pushing the accellerator. I haven't had the scanner plugged in when it happend yet, but I'll bring it along from now on and leave it in monitor/record mode and see what's going on. But, as some of you told me when I first got my Z, the more I drive it, the better it likes it. That seem to be the case! It has really come around a lot in a short time. It is like it is/was waking up after a long winter nap! My wife, Ami, had an opportunity to take the Z for a drive. She reported that she came up on a pickup truck doing about 50 mph on a country blacktop and she decided to pass it. She said she down-shifed and floored it, and was rewarded with that LT5 thrill (we all love so well!). Her comment after was, "What a BEAST!" I just said..."Yep!" She initially questioned my trading Vettes at first (makes two of us!), so I asked her if she thought trading my pristine '95 for the '90 Z was a good idea afterall? She said, "Absolutely!" I think we have another Z convert! ![]() Terrific board, BTW! P. Last edited by Paul Workman; 11-18-2007 at 10:49 AM. |
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#2 |
Join Date: May 2005
Location: Leesburg, VA
Posts: 2,713
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Are the injectors originals?
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Bob Saveland Former owner of #2517 [IMG]http://a.random-image.net/aurora40/vette.jpg[/img] |
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#3 | |
![]() ![]() Join Date: Nov 2007
Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri
Posts: 6,493
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#4 |
![]() Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,194
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Paul,
Sorry about the multiple PMs, computer went nuts and kept sending copies...... LGAFF |
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#5 |
![]() Join Date: Mar 2004
Location: Found Member
Posts: 4,346
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Try some Redline fuel injector cleaner in the gas tank . It may help free up that sticker.
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Frank Urbo. NCM Lifetime member # 982 Registry Founding # 237 |
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#6 |
![]() Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,194
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This shows injector testing procedure w/o pulling plenum, most advise best done w/engine up to temp
http://www.zr1netregistry.com/forum/...jector+testing LGAFF 92 ZR1 #234 |
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#7 |
![]() Join Date: Dec 2004
Location: Jacksonville, FL USA
Posts: 4,645
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Paul,
Not trying to be a smart a$$, but the early injectors(OEM ones) are susceptable to ethanol induced failure of their coils, I think 90 thru 92 yrs. Just a fwiw. ![]() On the excercise subject.......yea man, do it! The Z will love for you to flogg it regularly. I learned that slowly and now that I accept it my Z is sooooo much happier. ![]() Tom
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1990 ZR-1, Black/grey, #2233, stock. ZR-1 Net Reg Founding Member #316 & NCM member |
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#8 | |
![]() Join Date: May 2007
Location: Westminster, Maryland
Posts: 3,687
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#9 | |
![]() Join Date: Dec 2004
Location: Jacksonville, FL USA
Posts: 4,645
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![]() ....oh, yea, someone please pass the 93 octane fuel! ![]()
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1990 ZR-1, Black/grey, #2233, stock. ZR-1 Net Reg Founding Member #316 & NCM member |
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#10 | |
![]() ![]() Join Date: Nov 2007
Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri
Posts: 6,493
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![]() The dang snow is flying around here already, so opportunities to blow the carbon out are gonna be slim and none for a while. ![]() P. |
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