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#1 |
Join Date: Mar 2014
Location: Chicagoland
Posts: 23
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A new 1991 ZR1 owner here, I have a few questions (yes, I did try the search button
![]() Where is the ODB1 port located? I did not see it under the driver's side dash. Do I nee to remove any panels to get to it? Which USB cable do I need to read codes using my lap top? Very rough running car here... Thanks! Last edited by roadczar; 04-05-2014 at 10:54 AM. |
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#2 |
![]() ![]() Join Date: Jun 2005
Location: pittsburgh
Posts: 4,632
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if the 91 is the same as the 90, and I think they are, it's about half way down the interior colored panel that's by your knees and it has a black plastic cover on it that pops off. I don't have any softwear to read codes, just gordons plugs, but i'm sure someone will tell you what they use shortly.
Welcome to the forum. What seems to be wrong with your car?
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It's not the car, it's the people - Doug Johnson 90 r/r "KEYS ON" nick named "T.L.B" |
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#3 | |
![]() Join Date: Oct 2004
Posts: 1,889
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In this post you can see it's approximate location to the hush panel edge. It's a tough find for many: http://www.zr1.net/forum/showpost.ph...95&postcount=1 Last edited by WVZR-1; 04-03-2014 at 02:46 AM. |
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#4 |
Join Date: Dec 2012
Location: NC
Posts: 1,786
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Welcome onto the boards there.
If reading codes is the only objective, you can get it done with a paper clip (once you find the ALDL interface). But scan software IS something good to have... Cliff [Dynomite] will post a link for eBay cable listings, for laptop-to-ALDL connector. I use this one from Moates:
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I'm getting my snappics / threads removed blindly as fast as I can, to get in compliance with copyright / license TOS on the boards here (lots of FSM pages and other copyright / license violations on my part; sorry guys). And thanks to all the guys who didn't whine when I posted those FSM copyrighted / licensed stuff in my threads... ( :thumbsup: [b]and to think I complied with a mod's request to delete a pic of him in a Challenge Car in NCM Museum, so he wouldn't get in hot water)[/b] Thanks to several guys here for sending parts FREE; BearlyFlying, WeGone, Geezer, GoldCylon, and more there, TonyD, mike100, fletchusmc... 1990 #2794; 4L60e Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless, Power Effects 3" [IMG]https://lh5.googleusercontent.com/-GHpfzty7DVU/UQn-0Ru2xAI/AAAAAAAAA14/08mz1p4QLD4/s445/Screenshot-5.png[/IMG] |
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#5 |
Join Date: Mar 2014
Location: Chicagoland
Posts: 23
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Thank you for all the responses!
I thought I looked pretty thoroughly, but will try again. I just picked up the car (539) from Arkansas and drove it home to Chicago. The car was running slightly rough when I picked it up, but 100 miles in to ~700 mile trip it started to misfire badly with the check engine light periodically coming on. It limped the rest of the way home. I had no choice, but to drive it the rest of the way, hopefully no damage resulted from that. Another thing I noticed was the oil pressure gauge being always pegged to the max in the lower gears. Currently my ZR1 has the power of a poorly tuned Chevette. ![]() I found couple of vacuum hoses loose (MAP and pressure regulator), I also replaced PCV check valve assembly hoses with ones from jerrygaskets. It and the felt much better at first, but after a short test drive it reverted back to a bad misfire and shake. So this is where I am now… So ’91 ZR1 has a 12 pin ODB1 connector? This one right? https://www.moates.net/aldu1-and-cab....html?cPath=64 Thanks again! Last edited by roadczar; 04-03-2014 at 08:32 AM. |
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#6 | |
Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,697
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There are enough of us here in Chicagoland to straighten the car out.
Welcome to the FBI. Quote:
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[SIGPIC][/SIGPIC]Former Membership Chairman Former ZR-1 Registry - BOD 1972 Corvette 4speed base Coupe SOLD long time ago 1984 Corvette Z-51/4+3 SOLD 1992 Corvette ZR-1 Aqua/Gray #474 SOLD 1992 Corvette ZR-1 Black Rose/Cognac #458 2014 Honda VFR Interceptor DX |
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#7 |
Join Date: Oct 2004
Location: Folsom CA
Posts: 1,648
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In order of likelyhood the usual cast of characters that will cause a "Badly Tuned Chevette" syndrome are:
- Fuel injectors - Coil packs - spark plugs/wires - Fuel pumps If the fuel injectors are original, they are the most likely culprit. Get one of the FBI (Fast Boys of Illinois) to pop over for a quick diagnosis, it will save you time, trouble and money. 'Crabs
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TomC '90ZR1 #792 Honorary Pirate [B]If it ain't FUN, you're doing something terribly WRONG. [/B] |
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#8 | |
![]() ![]() Join Date: Aug 2009
Location: South Dakota/California
Posts: 3,794
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![]() Low Mileage ZR-1 Restoration (Audio, Injectors, Starter, Clutch Hydraulics) |
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#9 |
![]() Join Date: Feb 2011
Location: San Marcos CA
Posts: 1,802
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If the injectors are original, replace them even if the problem turns out to be something else- they are gonna give you trouble- guaranteed.
probably if it kind of runs ok cold and then misses bad as it warms up- yeah, that's injectors. |
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#10 | |
Join Date: Mar 2014
Location: Chicagoland
Posts: 23
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~56,000. If I will be going through the trouble of pulling of the intake
I might as well also do the rest as suggested? - Fuel injectors - Coil packs - spark plugs/wires - Fuel pumps - secondary solenoid Anything else? Would like to remove as much emmissions related mess as I can (really don't want to pull the heads) Quote:
Last edited by roadczar; 04-06-2014 at 08:46 AM. |
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