OBDII KA HIGH NOX, HC, and Idle stock

[Silent_Fart]

So my 96 OBDII S14 is running like crap at idle. It is idling at about 2k and bounces. It failed smog with high NOX at 15mph but not 25mph and HC at both 15mph and 25mph. There are no engine codes but when I plug in an OBDII reader I get signals for the Oxygen Sensor, Evaporation System, Catalytic Converter, and EGR.

HC is 73 at 15mph and 51 at 25mphNOX is 776 at 15mp and 501 at 25mph

What I have done recentlySeafoamed carChecked injector impedanceChanged OilChanged Wires Changed PlugsChanged Oxygen sensor

Any idea's?

[Wc240]

for the HC's- whats your timing at? try adjusting the idle mixture/timing first thingwhat plugs did you put in it? higher heat range or oem spec?id do the procedure i listed above first. sounds like a timing issue. also try the TPS adjustment. that should bring your hc down and your nox down a bit(pending on how bad your timing is)then check for vac leaks, and make sure your coolant system is good(temp is very important with nox) the fact that your passing for nox on the 25/25 is proof that your egr is working properly

[Silent_Fart]

for the HC's- whats your timing at? try adjusting the idle mixture/timing first thingwhat plugs did you put in it? higher heat range or oem spec?id do the procedure i listed above first. sounds like a timing issue. also try the TPS adjustment. that should bring your hc down and your nox down a bit(pending on how bad your timing is)then check for vac leaks, and make sure your coolant system is good(temp is very important with nox) the fact that your passing for nox on the 25/25 is proof that your egr is working properly

My car does do this random thing where it will heat up for a minute when I have just started it then go back down to normal and stay there for the rest of the duration of the drive. The guy at the test place pulled out a timing light and checked it and said it was right but I will whip out my timing light this weekend and check it myself. What do you mean when you say try the TPS adjustment? Pull the TPS connector and move that little screw? Do you know which connector is for the TPS on an OBDII 240?

[Wc240]

in the FSM there is a procedure for the adjustments. TPS, idle mixture, and timing. should be all around the same place. did you take it to a test only or test and repair?

[Silent_Fart]

in the FSM there is a procedure for the adjustments. TPS, idle mixture, and timing. should be all around the same place. did you take it to a test only or test and repair?

Test only but I get unlimited retest

[Wc240]

good, glad to see some one does there research. i was just wondering to see if they reccomended a reason you failed( they cant do that)curious if they tested right, was this a good shop, good manners, speakenzie engrish, clean shop?do you know if your car was warmed up when they tested? not too many things can raise nox and hc at the same time

[Silent_Fart]

good, glad to see some one does there research. i was just wondering to see if they reccomended a reason you failed( they cant do that)curious if they tested right, was this a good shop, good manners, speakenzie engrish, clean shop?do you know if your car was warmed up when they tested? not too many things can raise nox and hc at the same time

Best smog shop I have ever been to, run by this nice older couple actually. The guy did tell me a list of things I could try(even though yes I can't technically do that) He told me to try stuff and come back and see how it goes. I am going to try to warm it up before I go next time as the car was probably pretty cold. But I know I'm not going to get it running right till I get that idle in order.

Upon driving the car earlier tonight the idle seemed to go back down (WTF??) but its loping whenever idling.

[seang]

What about the plugs? Are they the proper heat range?

[Silent_Fart]

Ok I have all today till sunday night to knock this out. For the plugs, I am fairly certain they are OEM spec, if after adjusting my TPS and getting my idle down and still have problems what does the heat range of the plugs have to do with anything? Also I am fairly certain all the issues I am having were the same prior to changing the plugs.

[seang]

You might consider this stuff...http://www.autobarn.net/ch05063.html

I have also read that you can pass by running some denatured alcahol with the gasoline, but I don't have to pass emissions, so this is just speculation, albielt supposedly "tried and true" internet speculation. Good luck buddy!