About ready to throw in the towel

[kpack5982]

1) The idle sticks high

I really don't know what to do now, the idle wants to stay up around like 2 grand once I get going. I think I gotta reset the idle without the iac to like 600 but I must have misread something to where the idle said to put it where you want it at. So I'll try to fix that.

2) Computer code 41 still comes out

So I know to test the O2 thing to test voltage is in the passenger kick panel, but which one of the connections is to the sensor on that side I think it is dark blue and pink? and what am I looking at with my meter, like what volts and is the car supposed to be running or not? And where do I hook up the sides to get a reading? Or should I go ahead and replace the o2 sensors, they appear to be the original and are really stuck in there

3) Car is running really bad, like it wants to hesitate and does so when it is at low rpms, and will afterfire if I give it too much gas, especially in 2nd. This is the main problem I think

4) Could any of this have anything to do with a bad injector and other injectors on the passenger side wanting to give it more fuel? Or Maybe is some of this caused by a bad iac or tps sensor?

Sorry for the long post but I'm about to say screw everything I've tried and go back to the stock intake and see if I have any problems with it. If I do and keep my 70mm throttle body will that be bad for the car or could I get away with it? Oh and low and behold one of my threads into my lower intake is stripped. I tried to place a very thin line of silicon around the external ports to hopefully help this, but I don't know if it was a worthless idea if there will be sealing issues

 

[redneck15431]

For your high idle, try unplugging the TPS and see if that calms it down. I've seen and heard of a bad TPS doing this many times.

For the O2 sensor and the backfiring, they could be directly related. The car could be running extremely rich and the fuel mixture is igniting in the exhaust. Are your cats glowing?

And for your intake, try re-tapping it. I'm guessing the upper intake is what you sealed off with silicone. I think it's 5/16"x16 or 18? Correct me if I'm wrong.

Edit: Also check your plugs and wires, to make sure you have the correct firing order and there is no arcing anywhere. When I first got my car together I used old spark plugs just to get it running and I was running really rich on one side of the engine. Turns out I had a spark plug arcing on the outside onto the head on one cylinder.

Good Luck man.

 

[kpack5982]

No cats, so don't know that, but lots of unburned fuel and there is noticably more heat, for instance with my 180 thermostat I'm pushing out about 200 to 210 degrees, and I can definitely feel the difference on the passenger side headers from the drivers side

How will the car react without the tps hooked up?

 

[TENGRAM]

code 41...your passenger side o2 sensor indicates lean, but half the time this is because the o2 sensor itself is faulty. i suggest you switch that o2 to the driverside and move the driverside o2 to the passenger side. then reset codes, drive it for about 20 minutes, and recheck codes. if the 41 is gone but a 91 (driverside o2 indicates lean) appears then you know that the o2 is at fault and you need to replace it.

if the 41 does come back then you may in fact be running lean and you should do the cylinder balance portion of the self-test as described near the end of the first post in this thread: http://www.my5oh.com/forum/viewtopic.php?t=190 , where it says "optional testing" . let us know.

 

[poneypower89]

the 70mm TB would be larger than the stock intake opening.. making it pointless.

 

[kpack5982]

could the o2 sensor be causing my drivability issues?

 

[HISSIN50]

I'd also ensure you have no vac leaks.

Jrichker outlined how to test the O2 on your other thread IIRC. I personally look for it to switch from 0.05 to 0.95V (to me .15 to .85V is ok though) at least once a second. As the sensors age, they lose amplitude and frequency.


Good luck.

 

[jrichker]

Stripped theads in the lower intake and you have a code 41 problem that could be caused by a vacuum leak? I think you might need to make a mental connection between these two items. Check to see that your stripped threads are not causing a vacuum leak.

I think that you have all the technical advice you need to solve your problem. The difficultly you are having is because of your approach to the problem. Go back and print out your previous posts and work your way through the checklists and code data I posted, one step at a time. Do not skip any steps, Do not pass Go, Do not collect $200. The code 41 description and the Surging idle checklist have what you need to resolve your current problems