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03-31-2009, 12:16 AM
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#1
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Join Date: Aug 2007
Location: Long Branch NJ
Posts: 706
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lt1 car problem
Ok, if anyone can link these symptoms together, they win a....thanks? 94 z28, 100k and change
Lets see....
Car runs great, most of the time
When it runs bad, It sucks. it misses terrible but comes back to life after a few seconds of throttle. Only temporary
Getting a check engine light once in a while, but the 94 z28 is like pulling teeth to read the codes, OBD1 USB cable is at the top of my shopping list
Failed emissions for HC, 365/118, and CO, 5.36/.65. Nox passed by half. So i assume that means EGR and cat working. But poor combustion, or super rich...which brings me to my next point.
Car runs very rich sometimes. Smells like a big block with a holley carb. Also leaves dark clouds at times under WOT. Has tons of power. "Supposedly" has an lt4 hot cam. Any way to verify? It feels like it pulls a little better than a stock lt1. Dont know for sure though
Injectors ohm out ok, all vac lines and plugs seem to be in order. All spark plug boots are attached well as far as i can feel. Have to get the car in the air to really get at them
Ive considered the Opti already...im not assuming/touching anything till i get the codes. Just after other things to look at. The car will get plugs/wires/coil and lube/filters shortly. Just need to get paid. So...anything else? help!!??11!!
Edit: Would also be terribly usefull if someone had an OBD1 ALDL cable laying around i could borrow for now
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Formerly known as REED!
JSFBOA
Draino?
Last edited by HeadlessNorseman; 03-31-2009 at 12:20 AM.
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03-31-2009, 02:09 AM
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#2
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Join Date: Jun 2008
Location: Piscataway
Posts: 189
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i'd get that code read before making any major decisions on replacing stuff, especially that opti, not too fun.
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"Don't Think, Just Replace Opti"
1996 Firebird Formula M6 Black/Ebony
K&N CAI, Flowmaster Catback Exhaust, MGW Short Shifter, DMH cutout, UMI STB and SFC's, LS1 Front Brakes, Tune by Madtuner
1995 Cherokee Sport 4.0L - Stock...for now
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03-31-2009, 09:39 AM
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#3
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Mongo the Meet Coordinator
Join Date: May 2008
Posts: 16,896
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Do you know if it was tuned for the hot cam?
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Quote:
Originally Posted by KirkEvil
repo bigals turd gen and part it out to a loving home
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03-31-2009, 10:18 AM
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#4
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Meet Coordinator
Join Date: Jan 2008
Location: brick/pt. pleasant beach
Posts: 19,341
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i would suggest getting the code read first. could have a cam in it and maybe a bad o2. is it always giving you this problem or only when warmed up? most obdII readers can read the obdI and 1.5
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03-31-2009, 11:52 AM
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#5
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Mongo the Meet Coordinator
Join Date: May 2008
Posts: 16,896
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Yea if you want we can "modify" my cable to get it to read yours. I think.
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Quote:
Originally Posted by KirkEvil
repo bigals turd gen and part it out to a loving home
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03-31-2009, 01:13 PM
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#6
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Join Date: Aug 2007
Location: Long Branch NJ
Posts: 706
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yeah i think i would have to cut that bar out of the middle. it would still work fine in an odb2 plug. Let me know if you ever find it. I was just looking for someone that may have had all these issues because of one certain part that they changed...just so i could have something to look forward to at least lol
__________________
Formerly known as REED!
JSFBOA
Draino?
Last edited by HeadlessNorseman; 03-31-2009 at 01:14 PM.
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03-31-2009, 06:23 PM
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#7
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Meet Coordinator
Join Date: Jan 2008
Location: brick/pt. pleasant beach
Posts: 19,341
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well reading the code is definitely the first thing to do. with unknown history of the car, it will be that much harder to diagnose 
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03-31-2009, 06:52 PM
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#8
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Mongo the Meet Coordinator
Join Date: May 2008
Posts: 16,896
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Thats the end on mine. I am pretty sure you can "adapt" a 94 reader to read the quasi OBDII of 95s, so I would assume you could work backwords...
__________________
Quote:
Originally Posted by KirkEvil
repo bigals turd gen and part it out to a loving home
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04-01-2009, 09:51 AM
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#9
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Sliderule / Moderator
Join Date: Oct 2004
Location: Catawissa PA
Posts: 2,294
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Without having the codes there is just too many variables. It could be something as simple as a sensor up to the opti.
What software are you going to use? I perfer TTS, 20 free scans and it is very easy to use.
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93Z M6 Black: The 385 Lives! Supercharged, 3-core front mount intercooler, GTP heads, 3:73's, Street twin clutch, Jethot Longtubes, Mufflex 4" catback/spintech, S+W cage, Spohn Suspenion, Yada Yada Yada
1) Build it
2) Race it
3) Break it
4) Repeat!!!
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