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Injen CAI Install for 2000+ Celica GTS 6-Speed
Nasty N8


1. Disconnect negative terminal of the battery

2. Remove bumper (4 snap screws on top, 4 bolts on top, 5 screws on bottom, 1 screw on each side near bumper each lens, remove bulb wiring for bumper lens's) Note: I have an aftermarket bumper so location and number of screws may vary.

3. Remove stock air box and detach any hoses or other objects keeping it from being completely removed. (I think there are 2 bolts holding it in as well) Air box is indicated by lower arrow in figure 1.


Figure 1

4. Remove the two part plastic tube running from the ECU. (Top part of this tube is indicated by the upper arrow in figure 1. Both pieces slide off for removal.) Set aside for cutting later.

5. Remove 3 pipe from throttle body. See figure 2.


Figure 2

6. Slip over the red Injen 45 bent sleeve onto the throttle body and loosely tighten with 3 clamp. (You will need to position it better later) See figure 3.


Figure 3

7. Slide small fuse box up and off of its mounting bracket and push to the side.

8. Screw in the 6 mm rubber vibra mount part provided by Injen into hole shown in figure 3.

9. Remove the hose from the bottom portion of the OBD canister. Use this hose to replace the remaining hose completely. (Refer to figure 4)

10. Unbolt the bracket that the small fuse box was on and bolt it back on along with the OBD canister. When done with steps 9 and 10 it should look like figure 4.


Figure 4

11. Cut an opening in the wheel well large enough to give you some room to work with the intake pipe. See figure 5.


Figure 5

12. Back in the engine bay, find the square vacuum-switching valve. Orient it as shown in figure 6 and replace the left hose with the 16 Injen hose, and the right hose with the 14 Injen hose. See figure 6.


Figure 6

13. Remove the bracket on the bottom of the square vacuum-switching valve held in by 1 screw (Indicated by arrow in figure 6).

14. Break off center prong of this bracket and reattach the bracket to the square vacuum-switching valve.

15. Remove the mass airflow sensor from the stock air box removed earlier.

16. Screw in mass airflow sensor into the flange on the CAI pipe with stock screws. Face the fuse connection pointing towards windshield. Refer to figure 7.


Figure 7 (sorry for the blurry pic)

17. Place CAI pipe into engine bay.

18. Slide the red Injen 45 bent sleeve over the top on the CAI pipe and loosely tighten with a 3 clamp.

19. Slide the other end on the CAI pipe through the hole previously cut in the wheel well.

20. The right side bracket on the CAI pipe should line up with the vibra mount and will be loosely fastened with the nut and washer provided.

21. Position the CAI pipe and the red Injen 45 bent sleeve such that it fits snugly with no kinks or folds.

22. Take the square vacuum-switching valve and attach it the remaining bracket on the CAI pipe using the nut, bolt, and 2 washers provided. (The bolt passes through the hole made by removing the center prong earlier.)

23. Connect the 11 red Injen hose to the nipple on the CAI pipe and to the bottom of the OBD canister. Refer to figure 8.


Figure 8

24. Attach the Injen filter to the open end of the CAI pipe in the wheel well and tighten with the clamp. Refer to figure 9.


Figure 9

25. Position the entire intake and tighten all clamps and screws used up to this point.

26. Attach the wire harness back to the mass airflow sensor.

27. Take the lower plastic tube piece set aside earlier and cut as shown in figure 10 (A).


Figure 10

28. Reconnect the two pieces using the red Injen sleeve and clamps provided.

29. Also cut the top piece indicated by the upper arrow in figure 1 in the center of its straight section.

30. Reconnect the two pieces of this tube with the other red Injen sleeve and clamps provided. (This alteration allows the pieces to fit over the CAI pipe. The final result should look like figure 11)


Figure 11

31. Attach these pieces back exactly as they were before removal.

32. Remove the small-unused tube from the engine block and use the 3 mm black cap to plug the nipple as shown in figure 12.


Figure 12

33. Use zip ties to keep wires organized and away from hot engine parts.

34. You will have one electric connection leftover that was attached to the stock air box. This will not be used, just zip tie it up. See figure 13 for this wire.


Figure 13

35. Reattach bumper and bumper lens bulbs.

36. Reattach battery terminal.

37. DONE!


Some post-install photos can be found @ [b]Injen Short Ram & Cold Air Intake - Install Pictures[/b]

i put a cold air intake in but my check engine light came on.. is this normal?

yeah i put a an injen cold air intake in my GT and my chk engine light is on too. can anyone shed some light?

follow rule number 1... disconnect your battery.

if you did that when you did your install and you are still having problems, check your hose placement, you may have reversed something in your installtion.

I bought a CAI Injen, I've never done this before so I ran into some trouble with the stock vacuum line that connects to OBD canistor wheres the other end of that vacuum line lead to on the engine? write back ASAP aight laterz

NugZ

I installed my cai and the check engine light also came on. I even reset the battery and it still came on. So I did a diagnostics test and it showed my front O2 sensor was reading too lean. what can I do to fix that?

check your hose connections and clean your MAF Sensor...
https://celicahobby.com/forums/ubbthreads.php/topics/56411/cleaning-the-maf-sensor-with-pics.html

Make sure your MAF sensor is plugged in and mounted right.

im having this lil problem with the new intake i installed, everything runs perfect at first, no engine lights or anything, but after a day of driving the engine light comes on, i disconnected the battery to reset the whole thing as explained before, then it went back to normal, but after driving the car for a while, the engine light came on again, i have everything istalled properly and the MAS is brand new, so can some1 give me some hint as what could be the problem... maybe the car is not fully adapted to the intake yet ? computer hasnt adapted to it ?
any help in this matter will be greatly appreciated.

it looks like this installed:

I have the same problem where the light goes off and then I drive around for awhile and then just comes back on. I checked the connections of the hoses and everything is right and I cleaned the maf sensor, also. what cna i do to fix this problem? Can anyone help please? Thank you!

well since using the injen intake renders some vacuum lines useless,you'll need to plug them up so as not to trip the ECU into" check engine"mode

The only hose i have, if i plug it then the engine sound like it is going to die. did you try this and it worked for u? what would i use to plug it with? thanks

I've been lucky(?) to purchase my GTS with the Injen CAI already installed. So far I've had two CEI (check engine indicator) incidents. The first time I took it to a Toyota garage, and they said it was the MAF and replaced it. The second time I took it to a different garage and the mechanic thought it was a combination of the two things.

The first was the electrical connection that is disconnected from the stock airbox. That connection is to the "Air Inlet Sensor" and is used to recycle the air to warm it up in the cold weather at engine startup (if I remember correctly). The problem is, I live in the great white north, and it gets rather cold up here at times. I don't exactly what effect this is having as the Toyota mechanic told me the engine is still looking to check the computer for this sensor. This could be a source for the CEI. If so, I haven't heard of a way other than clearing the light each time it happens to fix it.

The second was the TPS (throttle position sensor). The mechanic found the TPS at idle was at 9.8. All the cars he normally works on, it should be at zero. I spoke to a toyota guy and he said that it should be open a little (read: not zero). When the mechanic checked the codes for the CEI, it did give the code for the TPS. He's working on another GTS today and he's going to give me a call to let me know what the reading is on that one as it's stock.

I don't know if this helps at all, but it's info so take it as it is!

Cheers,
Mike

this guid looks much better than the on that came with the Intake.

is the install the same for a manual gt?

Looks like the TPS setting has nothing to do with the problem. The Throttle Pressure Sensor (typo in my last post) for the other GTS was 10.6. It would appear that mine is relatively normal. Haven't had a problem since the check engine light was cleared, but until it warms up here, I'll be following the solution of disconnecting the battery for 15 mins the next time the light comes on.

cheers,
Mike

The CEL light is coming on because you did not plug all your hoese in properly, I have just installed my injen, short ram. kinda the same thing. Look on your stock airbox, on the bottom you should see a brass colored like box, un bolt it from the airbox. connect wires with the blue plastic piece into it and any remaing hoses you left unplugged. thats what i did haven't had any problems.

yah i went and redid that.. i saw that i left that out and went through all the hoses and it is all hooked up right but the cel light is still on. any other ideas like maybe i cut the ecu tube too much? thanks for the help!

You know i should have known i have driven with my Injen Short ram for a month now, and no problems for 1000 miles, but on my way to work today, the dog on CEL light came on. I have no idea why i did but I will investigate tommorrow.

ok I think I have solved all the cel problems. pull apart your gauges and remove the cei led and vwala! no more light! lol no but seriously, i have tried everything and i think i am just going to have to except that cai = cel oh well...

have you plugged-in an OBDII reader to your car to see exactly what the CEL is

it might not even have anything to do with your Intake - it could actually be something different that needs attention

My CAI install went fine. I am having the CEL problem that everyone else describes, and I am not worried about it because it seems "normal". However, I tried to get my smog cert. and the tech told me that, because one of the electric connections that was attached to the stock air box is not used and is just zip tied up he won't pass me. Does anyone have any suggestions? I need to get a smog cert and cant because of that one thing.

why should that matter? He should only be checking for EMISSIONS...

I didn't think it should matter either, but he said that he wouldn't pass me since it appeared to him that something was missing. Do you have any sugestions on where I could go to get the smog check done with out any further hastles. I think I may have been taken advatage of because I am a woman. I think that happens a lot even though I know a little about cars.

take you car to a professional... if he said that he thinks something is missing, but cannot name exactly what that something is, he shouldnt be working in the field of automotive inspections

"i think there is something missing, but i dont know what it could be - so I will just fail you"

The install went okay until the end when a few big problems came up. First, I can't position the pipe so that I can screw in the pipe to the rubber vibra mount. I even cut a big hole in the wheel well, but its just not fitting right. I think its the pipe from the ECU that is in the way.

Second, the stock hose from the stock airbox is not long enuff to reach from the OBD canister to the nipple on the CAI pipe. Does the AEM come with another hose? I bought this used and it didn't come with any rubber hoses.

Third, I haven't figured out what the 2nd nipple on the pipe is there for.

The car makes a painful hissing nose without the hose attached to the nipple.

Did you even bother reading the install instructions above??

ECU tubes:
4. Remove the two part plastic tube running from the ECU. (Top part of this tube is indicated by the upper arrow in figure 1. Both pieces slide off for removal.) Set aside for cutting later.

29. Also cut the top piece indicated by the upper arrow in figure 1 in the center of its straight section.

30. Reconnect the two pieces of this tube with the other red Injen sleeve and clamps provided. (This alteration allows the pieces to fit over the CAI pipe. The final result should look like figure 11)


Hose is not long enough::
9. Remove the hose from the bottom portion of the OBD canister. Use this hose to replace the remaining hose completely. (Refer to figure 4)

Thanks for the reply. I have the AEM CAI, so I been told its a bit different. I heard that I don't have to cut the ECU tube.

I'm getting ready to install my Injen CAI, and I've been looking over this install guide for preparation. Can anybody tell me what the quote from above means. Which remaining hose does he speak of?

Hey all, I got an AEM intake for my 2001 Toyota Celica GT. I followed all the correct directions and even took it to a import shop they said everything was correct. But my sometimes when I run the car up to 5000 rpms and shift into neutral the car will shut off. Any clues or suggestions on how to fix this?