| 93 with alot of problems |
Subject: 93 with alot of problems by sonomacrew01 on 2007/11/7 22:15:00 It all started back in the winter of 05 when I pulled the 77,000 mile motor and started modding. I had installed a LT4 hotcam kit, 94+ style vented MSD opti, MSD coil, MSD wires, MSD 6AL, Stainless Works longtubes with high flow cats, 3" B&B exhaust, electric waterpump and a PCMforLess tune. After all this, the car had a skip at 2000 rpms so I brought it to a local tuner in Spring 06' who burned me a new chip and I've driven it like that until it cametime to check for emissions in July 07'. The car failed, running way too rich. Here's the info... HC PPM at idle = 623, limit was 220 HC PPM at 2500 = 128, limit was 220 CO % at idle = 2.97%, limit was 1.20% CO % at 2500 = 2.94%, limit was 1.20% Since then, I've replaced all injectors, spark plugs and installed Delco heated O2 sensors. Also, I've purchased TTS Datamaster to help me understand whats happening. I've brought the car back to the original tuner and never got any help. I've brought the car to a mechanic to do a leakdown test....cylinder walls and heads are on good. I've also puchased a new tune from PCMforLess. Here's my take from Datamaster... Engine at 200, oil at 190 1)Lterm Always stays "red" which means rich 2)Sterm in closed loop turns red, open loop returns to 128 counts 3)car goes in and out of closed loop 4) open loop makes RPM's jump by 100 5) MAP, 50 KPA at idle, 80 when on the throttle, 18 immediately after off the throttle 6) TPS at 6000shows 50%, 1.96 V 7) one O2 hovers between 400 and 600mv 8) one O2 in closed loop between 100 and 900mv, hovers around 800 in closed loop anything you guys would reccommend? |
