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| Weird click sound coming from engine (Page 1/2) |
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86fierorestoproject
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MAR 26, 09:03 PM
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Okay, I have an 86 SE, 2.8 V6 with a 3-speed auto both with 109k (were rebuilt somewhere around 80k) and the engine is making a click/bang sound. i have no idea what it is. it is a slow pop from idle to 3250 (wants to die in that rpm range) and a fast pop/straight piped honda sound from 3250 to 6000. i changed the cylinders 1, 3, 5 spark plugs, but cant get to the other three. also the cats are deleted and it has never made that sound in its deleted lifetime. i will post a video in the morning for the click sound, but i thought it was a misfire at first but im getting worried my engine is on the way out the door. if anyone knows what it is, please help!
Thanks for your help,
Nolan
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Patrick
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MAR 26, 09:41 PM
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| quote | Originally posted by 86fierorestoproject:
i changed the cylinders 1, 3, 5 spark plugs, but cant get to the other three... im getting worried my engine is on the way out the door.
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If you can't "get to the other three", find someone who can. Checking/replacing spark plugs is about as basic as engine maintenance goes.
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Xenoblast
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MAR 26, 09:46 PM
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| quote | Originally posted by 86fierorestoproject:
i changed the cylinders 1, 3, 5 spark plugs, but cant get to the other three.
Nolan |
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You can take off the decklid for better access, its like 4 bolts so its not hard.
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Notorio
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MAR 26, 10:39 PM
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| quote | Originally posted by Xenoblast:
You can take off the decklid for better access, its like 4 bolts so its not hard.
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I'll second that motion for removing the decklid. The 5 minutes you will spend doing that create So Much clearance for medium and large hands to get at the plugs. Chances are your 2,4,6 plugs haven't been changed in a long time. On one of my Fieros that meant the spark plugs were rusted solid and it took a couple of days applying rust buster and tapping the plugs free them up. Many people have noted that slightly tightening stuck plugs and bolts helps to break the rust.
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skywurz
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MAR 26, 10:45 PM
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I was told of a 120k spark plug that took many days to get loose. Was installed at the factory. Then he handed me the spark plug and said take it as a good luck charm.
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eelecurb
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MAR 26, 11:27 PM
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Another reason to remove the decklid is it will make it easier for you to examine the firewall side exhaust manifold. A leaking manifold can sometines produce a clicking/ticking sound. [This message has been edited by eelecurb (edited 03-26-2021).]
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86fierorestoproject
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MAR 27, 12:42 AM
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well the first 3 i changed in an autozone parking lot. they broke free easily. got NGK's instead of ACDelco now. the back 3 im taking it to the mechanic for. now we just have to deal with the knock/click sound (if new plugs in back doesnt get rid of it.) any more ideas as to what that clicking is? could it be misfire?
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skywurz
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MAR 27, 12:51 AM
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Did you gap the plugs?
Did you make sure they were the same length?
Also have heard stories of tips breaking off of spark plugs and causing a tapping knocking sound... But you know old mechanic tails .
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86fierorestoproject
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MAR 27, 12:57 AM
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i will check in the morning cuz it's 2am rn. i think i gapped them but cant remember.
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86fierorestoproject
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MAR 27, 06:38 AM
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