Engine Knocking

jmfpEJ22T · Post by **jmfpEJ22T** » Sat May 25, 2013 3:05 am

I have a 93 touring wagon with a jdm ej20g. Not too long ago i noticed my car was sounding different and maybe only running on 3 cylinders? It starts to shake when the rpms start to go back down after starting. I drove it around a bit and i noticed when it accelerates it knocks. This is quite scary and im just wondering what could be wrong with it.

alexandermf · Post by **alexandermf** » Sat May 25, 2013 4:16 am

How loud is the knock? It could be anything from hydraulic lifters ticking to rod knock...

jmfpEJ22T · Post by **jmfpEJ22T** » Sun May 26, 2013 12:37 am

its not too loud but i dont really have anything to compare it to..

robertpaige · Post by **robertpaige** » Sun May 26, 2013 1:44 am

Post a video.

jmfpEJ22T · Post by **jmfpEJ22T** » Sun Jun 09, 2013 5:16 am

Ok heres the deal. One day i started my car up and it ran perfectly and it hasnt done anything since. What could this be? Could the timing have been off?

robertpaige · Post by **robertpaige** » Sun Jun 09, 2013 6:49 am

The knock your talking about may have been lifters? They can tick pretty loud and be mistaken as a slight knock and can come and go. A rod knock will never go away or fix itself. Does the car still shake?

James614 · Post by **James614** » Sun Jun 09, 2013 10:28 am

Accidently put some 87/89 octane gas in it? My Touring Wagon got filled with 89 once and it knocked/shook quite a bit. Problem was gone as soon as it got filled with 93 again.

jmfpEJ22T · Post by **jmfpEJ22T** » Mon Jun 10, 2013 10:54 am

No only 92 octane..

jmfpEJ22T · Post by **jmfpEJ22T** » Mon Jun 10, 2013 10:57 am

the problem does sound alot like how you decribed with the shaking and knocking and then after revving it goes sub-500 rpm......

jmfpEJ22T · Post by **jmfpEJ22T** » Mon Jun 10, 2013 10:59 am

could this be caused by a bad ecu because im trying to figure out whether i should get a robtune ecu or not because 380 is a bit much if its not going to fix anything.

robertpaige · Post by **robertpaige** » Thu Jun 13, 2013 7:07 am

I doubt the ECU just went bad. Get the car running good before you do any modifications or tunes.

Is the issue still happening? or did you say that it went away..

Mister Anderson · Post by **Mister Anderson** » Fri Jul 19, 2013 8:48 pm

http://bbs.legacycentral.org/viewtopic.php?f=5&t=49425

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A forum for 89-94 BC-BF(BJ) Legacy Owners and Fans

Engine Knocking

Engine Knocking

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