engine hesitation after Injen install
 

I just installed my Injen CAI on my 99 LX. It runs great except for one thing. When I push the throttle down just about half way and the engines between like 2000 and 3000rpm's, theres a noticable lurching or hesitation in the car. I already reset the ECU and let it idle for like ten minutes. Now it idles better than it did stock, but i still have the lurch. I'm not talking a violent lurch that threatens to throw me off the road, just a hesitiation in the engine. Dirt or dust on the O2 sensor? I saw some grime through the hole the O2 sensor mounted up to when i installed: i guessed it was the dust from the milling machines from when Injen manufactured the intake. Any suggestions?

i'll reply first because i know most people are tired of this. if you make a gasket where the Mass airflow sensor connects to the intake it will take care of 90 percent of the problem. the sensor also gets dirty very quickly so clean the sensor with a cotton swab. also if the air is too turbulent going past the sensor it will cause it. Some people have cut the tube and turned it into a short ram and have said that it takes the problem away, others have cut the sensor housing off the stock box and used that on the intake. I've tried everything so far, but nothing has taken the problem away 100 percent. i made a gasket and used the stock sensor bung and the problem is still there. i hope this helps you out. also if you use the search button you can find the 1000 pages on this topic

is this wit the 2.0s as well?

With the 2.0 liter engines, if you use an Injen CAI or an AEM SRI you will have virtually no problems with the fitment. You must use the correct AEM depending on whether you have a M/T or an A/T transmission. With an E-Bay intake, you may or may not have problems but, in any case, I don't believe an extra gasket will be needed for the MAF sensor connection.

The MAF on a 2.0 is a tube style instead of the air box style I believe they are talking about. That is why the issue here does not affect a 2.0.

Ahh thank you! caz i ordered the liveonspeed cai i just got it yesterday it is so sweet looking, i got in blue and iz identical to the laser blue of the protege im pumped i cant wait to install it lol

any how tos for this i searched and couldnt find one but i know there is ive seen them before but i cant find them

Go to : www.protege5online.com and click on Tech Help and then Injen CAI installation. I know you don't have an Injen but you will at least get some ideas about how to proceed with your own installation.

02 DX Millenium Red

Also, a problem related to this thread. I kicked a CEL yesterday, and had to take it to the dealer (ICK). A stupid vacuum line from by the throttle body had come loose, and was affecting my performance and a myriad of other things. This might be related to the hesitation that you are speaking of. If you are curious which one I am talking about, it is the vacuum box that was placed into the stock intake right by the throttle body. On my kit, it relocates the whole thing to a place on the intake manifold.

Runs a lot better now, and it is noticeable.