My Ranger failed the emission test with high hydrocarbon (284) on the low/idle RPM. The upper limit is 200. It passed on the high RPM. I had the catalitic converter tested and it is working. I tuned it up including: new cap, new rotor, new wires, new plugs, new air filter, new fuel filter, new O2 sensor, and an oil change. I checked the timing and it is off 1* from the specification sticker on the radiator support so I did not change this. I ran a tank of fuel thru it with an injector treatment additive. I don't know if this is related or not but it has been idleing intermittingly on the high but acceptable range (1100 to 1200 RPM's). Other than that, it seems to run fine with a smooth idle, even if somewhat high, and it seems to have plenty of power. Does anyone have any idea what I could do or check to correct this issue and make it pass the emission test?

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1988 XLT Ext Cab 2WD 2.3L Manual

you only needed one thread in one section.

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YZ the way to be!
The Brotherhood!

Mods to come: Camburg entry 6.0 system. FiberwerkX Fenders and bedsides. Tube bumper.
R.I.P. Jeff Ashton. 1992-2011

i was about to tell him that but a mod already deleted it

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Ford Ranger Edge Supercab, 2004 3.0 Auto, 2WD, 4.10 Axle 31x10.5x15 BF Goodrich All Terrain T/A KO's


My Truck Is My Mountain Bike's Ride!

Class III hitch, Rhino Bedliner, Almost Maxed T-Bar Crank, Tuff Country Add A Leaf, Custom Low Anchor Points, OEM ('99) Tow Hooks, Pro Comp Offroad Lights , Mustang Dome Light, Clear Corners, Slim Toolbox, Blinker Mod,Cargo Brake Light Mod,Expo Lighted Visors, Ultra Silverstar heads/fogs, Fog/high mod, Reverse/switched lights, Bike Fork Mounts

Thanks for the heads up on the singular posting. I am a newbie, please be patient. Any advice on my emission issue?

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1988 XLT Ext Cab 2WD 2.3L Manual

no problem. also when you changed everything up and did the maintainance did the emissions output change?

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YZ the way to be!
The Brotherhood!

Mods to come: Camburg entry 6.0 system. FiberwerkX Fenders and bedsides. Tube bumper.
R.I.P. Jeff Ashton. 1992-2011

no big deal man, no worries. im sure someone will be able to help you out with your issue though as soon as they see this thread.

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I had done everything except the oil change and the hydrocarbons were 414. Once I did the oil change, the hydrocarbons on the idle dropped. I can't explain it.

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1988 XLT Ext Cab 2WD 2.3L Manual

thats normal. HC is a misfire, completely unburned gasoline. id check for leaky injector, or double check your ignition components. what brand did you buy?

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-Alex
'10 Ranger XL 2.3L Manual
Mods: Stereo, Tint, Weatherguard rain shields, Intake silencer removal, LED brake, turn signal, reverse, license plate, and dome lights, DDM HID's (currently removed), lowered, 17" wheels with spacers, Explorer autodim mirror with Autolamps, Magnaflow exhaust, Buggman LED 3rd Brake Light...