Just failed my ASM emissions test in Houston. This is my first test as I bought the car last year. HC is double the standard, CO and NOX are okay. Here are the numbers:
------------------25 MPH--------------------15 MPH---------
-----------Standard---Reading---------Standard---Reading---
HC------------148-------292-------------152--------328
CO------------.94--------.61-------------.86---------.58
O2----------------------14.2------------------------14.2
NOX---------1047-------721-------------1146--------512
Dilution-------->6-------14.8-------------->6--------14.8
The car has a stock turbo, intercooler, and engine internals. Mods include blue tops, Red Armstrong 93 chip, Kirban regulator, Walboro 307 pump, 3" downpipe, 3" cat, and Hooker dual exhaust. The regulator is at 40 psi because the O2's were high (880) at full throttle with 45 psi fuel and 17 psi boost. In the last year I have put on new plugs (NGK UR5), new plug wires, new used coil and module (from RedRegalT), and a new crank position sensor. It had new PCV and EGR valves when I got it a year ago.
The engine has 138,000 miles and has never been into as far as I know. It uses about a quart of oil every 1500 miles but a lot of that goes on the ground (oil leaks). The car runs smooth on the road, but has always idled a little rough. I haven't run a compression or leak-down test, but the vacuum numbers look okay (16-18" at idle, 12-14 at 70 mph, 24"+ when closing the throttle from highway speed). I use WinALDL as my scan tool, but I haven't had it on the car in while. The last time I looked the O2 cross counts and BLM's were reasonable.
A couple things do bother me. The exhaust smells rich even when the car is good and warm. And the cat converter just doesn't feel much warmer than the surrounding exhaust.
Help !!!
------------------25 MPH--------------------15 MPH---------
-----------Standard---Reading---------Standard---Reading---
HC------------148-------292-------------152--------328
CO------------.94--------.61-------------.86---------.58
O2----------------------14.2------------------------14.2
NOX---------1047-------721-------------1146--------512
Dilution-------->6-------14.8-------------->6--------14.8
The car has a stock turbo, intercooler, and engine internals. Mods include blue tops, Red Armstrong 93 chip, Kirban regulator, Walboro 307 pump, 3" downpipe, 3" cat, and Hooker dual exhaust. The regulator is at 40 psi because the O2's were high (880) at full throttle with 45 psi fuel and 17 psi boost. In the last year I have put on new plugs (NGK UR5), new plug wires, new used coil and module (from RedRegalT), and a new crank position sensor. It had new PCV and EGR valves when I got it a year ago.
The engine has 138,000 miles and has never been into as far as I know. It uses about a quart of oil every 1500 miles but a lot of that goes on the ground (oil leaks). The car runs smooth on the road, but has always idled a little rough. I haven't run a compression or leak-down test, but the vacuum numbers look okay (16-18" at idle, 12-14 at 70 mph, 24"+ when closing the throttle from highway speed). I use WinALDL as my scan tool, but I haven't had it on the car in while. The last time I looked the O2 cross counts and BLM's were reasonable.
A couple things do bother me. The exhaust smells rich even when the car is good and warm. And the cat converter just doesn't feel much warmer than the surrounding exhaust.
Help !!!