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HeadlessNorseman · 03-31-2009, 12:16 AM

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

03-31-2009, 12:16 AM	#1
HeadlessNorseman Join Date: Aug 2007 Location: Long Branch NJ Posts: 706 iTrader: (0)	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 __________________ Formerly known as REED! JSFBOA Draino? Last edited by HeadlessNorseman; 03-31-2009 at 12:20 AM.