20V MK1 Engine Swap i need help, im about to go insane!!! - Page 2

mr220v · 04-25-2008, 11:57 AM

21 and 25 are o2 related. Don't know why 25 is showing us, usually it's just 21.

41 is tps. If it's plugged in, this code will go away after the reset.

24 is airtemp. You probably don't have one plugged up. If you don't have one, go get one from a junk corolla. Either way, this item doesn't make much of a difference.

33 is IAC, and is your main problem. Once again, I can see in the picture you sent me that it's not hooked up. Hook it up and your CEL will go off.

After that, look at your timing.

muffinman · 04-25-2008, 12:09 PM

mr220v yesterday you said that an O2 sensor wouldn't give a CEL but now you say that 21 and 25 are O2 related so who's right? Seems to me that as I said yesterday , that it could be a bad O2 sensor. My old toyota truck showed CEL when the O2 was bad , once I replaced it and reset the code everything went back to normal including my fuel consumption and occasional rich smell from exhaust.

mr220v · 04-25-2008, 01:09 PM

Putting an O2 on is one of the last things people do when finishing up a 20v project. Mainly because the exhaust is the last thing to go in.

Code 21 doesn't trip the CEL. It just hurts fuel economy.

IAC will most certainly trip the CEL.

muffinman · 04-25-2008, 02:53 PM

^so if an O2 doesn't trip a CEL then why does it have a CEL code?

monkeydemond · 04-26-2008, 12:54 AM

well like i said, i pluged in the IAC back in and it ran alittle better. i got bored at work on my lunch break so i unpluged my tps and it ran completely the same, so im guessing thats either bad or i need to check my wiring. if my o2 sensor is bad then y would it make a difference if its hooked up or not?

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04-25-2008, 11:57 AM	#21 (permalink)
mr220v Beams Owners Group Join Date: Mar 2006 Posts: 2,527 Thanks: 13 Thanked 176 Times in 147 Posts iTrader Rating: (11/100% )	21 and 25 are o2 related. Don't know why 25 is showing us, usually it's just 21. 41 is tps. If it's plugged in, this code will go away after the reset. 24 is airtemp. You probably don't have one plugged up. If you don't have one, go get one from a junk corolla. Either way, this item doesn't make much of a difference. 33 is IAC, and is your main problem. Once again, I can see in the picture you sent me that it's not hooked up. Hook it up and your CEL will go off. After that, look at your timing.

04-25-2008, 12:09 PM	#22 (permalink)
muffinman U-P-G-R-A-Y-E-D-D Join Date: Jan 2008 Location: Sunny South Florida Posts: 5,878 Thanks: 53 Thanked 282 Times in 271 Posts Blog Entries: 1 My Google Map iTrader Rating: (2/100% )	mr220v yesterday you said that an O2 sensor wouldn't give a CEL but now you say that 21 and 25 are O2 related so who's right? Seems to me that as I said yesterday , that it could be a bad O2 sensor. My old toyota truck showed CEL when the O2 was bad , once I replaced it and reset the code everything went back to normal including my fuel consumption and occasional rich smell from exhaust.

04-25-2008, 01:09 PM	#23 (permalink)
mr220v Beams Owners Group Join Date: Mar 2006 Posts: 2,527 Thanks: 13 Thanked 176 Times in 147 Posts iTrader Rating: (11/100% )	Putting an O2 on is one of the last things people do when finishing up a 20v project. Mainly because the exhaust is the last thing to go in. Code 21 doesn't trip the CEL. It just hurts fuel economy. IAC will most certainly trip the CEL.

04-25-2008, 02:53 PM	#24 (permalink)
muffinman U-P-G-R-A-Y-E-D-D Join Date: Jan 2008 Location: Sunny South Florida Posts: 5,878 Thanks: 53 Thanked 282 Times in 271 Posts Blog Entries: 1 My Google Map iTrader Rating: (2/100% )	^so if an O2 doesn't trip a CEL then why does it have a CEL code?

04-26-2008, 12:54 AM	#25 (permalink)
monkeydemond No Skills Join Date: Apr 2008 Location: detona, fl Posts: 19 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	well like i said, i pluged in the IAC back in and it ran alittle better. i got bored at work on my lunch break so i unpluged my tps and it ran completely the same, so im guessing thats either bad or i need to check my wiring. if my o2 sensor is bad then y would it make a difference if its hooked up or not?