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Joined: Aug 2003
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silver
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silver Jun 20, 5:14am - #202426 
2000 Silver Toyota Celica GT
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2000 Toyota Celica GT

Joined: Aug 2003
Posts: 1,251
California
Intake CEL Troubleshooting Guide

Due to the incredible number of new threads asking about getting a CEL after the installation of an AEM or Injen Intake, I thought I would make a thread about the most common solutions. Mods, if you find it worthy, I would like it stickied. smile



FIXING A CEL (CHECK ENGINE LIGHT) AFTER AN Intake INSTALL

Complete these steps in the listed order, do not skip around.


Step 1:
Check ALL of the vacuum lines and make sure that each one is attached correctly and is in the right place.


Step 2:
Check to make sure that the MAFS (Mass Air Flow Sensor) is inserted into the Intake pipe correctly.

The MAFS is shown in this picture, it's the large black square on the Intake pipe.

Linked Image

It's in this photo as well.

Linked Image


Step 3:
If you are positive that all of the vacuum lines and the MAFS are in their correct places, the next step is to reset the car's ECU (Engine Control Unit, the car's brain).

Follow these steps:
1. Disconnect the negative battery terminal (the black one).
2. Let the car sit for AT LEAST 15 minutes, it's recommended that you wait a half hour.
3. Reconnect the battery terminal and start the car to make sure that it's connected properly.


Step 4:
Clean the MAFS. Follow these instructions EXACTLY.

https://www.celicahobby.com/ubbthreads/thread.f_1862388016_0_collapsed_2__1.html

You are trying to clean the 2 air flow sensor wires which live inside of the MAFS. They are small and hard to see, but they're there and expensive to replace. You also need to clean the contacts between the wiring harness and the MAFS housing.

Linked Image

Step 5:
If you complete all of the above steps and the CEL remains, take your car to either your Toyota dealer or an auto parts store and ask them to check what CEL code the ECU is throwing. You'll recieve and number and about 5 words which will give a small description of the problem. Be sure to write the code down so you can post it, and we will try to help you troubleshoot what it is and how you can fix it. We're here to help. wave grin thumbsup
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celicafourotwo
Specialist
celicafourotwo Jun 20, 5:20am - #202427 

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2000 Toyota Celica

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Nebraska
^^^it's about time someone put up a guide for that problem..

Good job..the guide should clear up any problem from here on out.. thumbsup

Originally Posted by pesho01
Question:
Whenever my car is at a full stop or even in park the RPM never sits on 0. what does this mean?
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Posts: 1,143
booyaolian
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booyaolian Jun 20, 5:54am - #202428 
2000 Black Toyota Celica GT
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2000 Toyota Celica GT

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Posts: 1,143
Austin, TX
good...very informative
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Virgilson
TheFilipinoCrew
Virgilson Jun 20, 7:02am - #202429 

TheFilipinoCrew
2000 Toyota Celica GT

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Pomona, CA
thumbsup thumbsup thumbsup
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ravertony
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ravertony Jun 20, 5:35pm - #202430 
2002 Super White Toyota Celica
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2002 Toyota Celica

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MADERA, CA
good job man.. people are always askin and i have to repeat myself so many times by the way in step 3 you should metion that when you turn the car on you cant touch the pedal for like 15 minutes at all or it will like kill the ECUs automatic adjustment..
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round2gts
Member
round2gts Jun 20, 7:00pm - #202431 

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2000 Toyota Celica

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Posts: 306
New Hampshire
Originally Posted by Virgilson
thumbsup thumbsup thumbsup
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silver
Specialist
silver Jun 20, 7:13pm - #202432 
2000 Silver Toyota Celica GT
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2000 Toyota Celica GT

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Posts: 1,251
California
Can't edit it anymore.
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Easy_C
Senior Member
Easy_C Jun 20, 7:45pm - #202433 
2000 Spectra BLUE BABY! Toyota Celica
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2000 Toyota Celica

Joined: Sep 2003
Posts: 476
Mass
also note that some CELs are caused directly from the Intake itself, so dont think your car is totally f-ed up if you try everything and are unable to fix the CEL.

TPR Intake! - Injens high end with AEM's low end and NO BOGGING!
TPR EXHAUST! - Exhaust made 10.5 whp peak and 32 whp at 6300 on my car!!!
http://www.tuningprecisionracing.com/shop
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celicafourotwo
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celicafourotwo Jun 20, 9:45pm - #202434 

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2000 Toyota Celica

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Posts: 1,716
Nebraska
^^true dat..

Originally Posted by pesho01
Question:
Whenever my car is at a full stop or even in park the RPM never sits on 0. what does this mean?
Joined: Aug 2003
Posts: 1,251
silver
Specialist
silver Jun 22, 1:13am - #202435 
2000 Silver Toyota Celica GT
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2000 Toyota Celica GT

Joined: Aug 2003
Posts: 1,251
California
Ninja bump. spineyes
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