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'89 245 EZK ign LH 2.4FI 252,000 mi. Failed emissions w too high HC (1.77gpm) and NOx (5.44 gpm). CO is 1.44 gpm -low and good/pass.
So I put a can of FI cleaner into gas tank, new NGK plugs, new air filter, new oil filter & oil, new timing belt, new O2 sensor, switched FPR valve, swapped in a good compatible AMM, flushed cooling system & put in new 50/50 mix. Retested at 254,000 miles - HC now low enough (0.58 gpm) but NOx slightly higher (6.42 gpm) and still failing. OBD says problems w injectors...
So I drive the car w expired inspection and at 255,000 mi I work on injectors (first time for me for removing/servicing injectors). Couldn't locate a shop that services or rebuilds gas fuel injectors, only diesel...
I have battery voltage at injector hot leads. I removed and cleaned/flushed injectors w aerosol cleaner. All 4 have approx 16 Ohms at elec contacts. All 4 had flow through when I pushed the FI down to depress the tip/needle. I flushed and now they are cleaner. I put new sealrings and endcaps on them w a light coating of vasoline. I've been using 93 octane gas. I re-installed and started engine. It seems smoother. I go for another emissions inspection on a diff machine Feb 25, 2009:
HC 0.39 pass, CO 5.45 pass, NOx 5.02 fail (2.00 gpm is Test Limit for NOx).
I run OBD at home and get Fault Codes 2-2-1, 2-3-1, & 1-1-3. "Check Engine" light is on, so is "Service" light.
NOW will I see the light and the consequences of my Cheapness? There is a big hole in exhaust pipe/header where bracket attaches it to transmission. I've patched it with furnace cement and fiberglass cloth, but it steadily blows that away, leaking more and more exhaust out before it reaches the O2 sensor just beyond, and then comes the Cat. Is the "thinness" of the exhaust effecting the O2 sensor reading, which is then signalling for more fuel to be injected, thus giving me "extremely rich or extremely lean air/fuel mixture at cruise" 2-2-1 ? If so, I'll buy a new exh pipe for c. $140. If not, then I may need 4 new injectors at $120 each. Yikes!
Another Inspector told me to drive down to the Bronx and buy a sticker for $200, but I don't want to do that.
I figure I'm close to the correct fix. Hoping BB experts will guide me to the finish. Thanks in advance.
Steve
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