I just had to drop another engine into my 93 civic and after we had it all setup and ready, it started at the first touch of the key. Once I drove it down the road I noticed that it had a bad spark knock when the engine was under load (driving low in gear or going up hills) I thought it was just the old gas in the tank but that is all gone now and it is still knocking. So what are some other options......what are all the causes of spark knock? if there are alot of causes of it I don't mind doing the old trial and error way but maybe some of you have cured this problem an easier way? oh the engine is a D15B7 if that makes any difference

 

i've got the same damn prob.....i was told it was rod bearings...so i changed them.... and that didn't help at all.....i got it in my #2 cylinder D15B7 and it goes away when i pull that wire off!!!.....it's quite loud at start up and goes away substantially when the engine is warm......but when your on the gas you can still hear it, though faintly.....................i have no fukin' clue what it is either!!!!!!!!!!!!!!!!!

someone help........please

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 95cxhatch &raquo;</TD></TR><TR><TD CLASS="quote">it's quite loud at start up and goes away substantially when the engine is warm......but when your on the gas you can still hear it, though faintly</TD></TR></TABLE>

Wow. Maybe you threw the rod itself? Check it out.. lest I be correct and the bottom end blows out.

As far as the .. spark knock? You mean combustion knock? It's caused by early detonation. What kind of plugs are you using? OEM? And what octane are you running?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by R_EG &raquo;</TD></TR><TR><TD CLASS="quote">

Wow. Maybe you threw the rod itself? Check it out.. lest I be correct and the bottom end blows out.

As far as the .. spark knock? You mean combustion knock? It's caused by early detonation. What kind of plugs are you using? OEM? And what octane are you running?</TD></TR></TABLE>

it only started doing it lately ....i have 185 km's on the engine, with OEM spark plugs....i've had the bottom end taken apart to replace the rod bearings and there was NO play in the rods at all....could it be a wrist pin or something worn badly???

i'm using 92 octane all the time!!!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 95cxhatch &raquo;</TD></TR><TR><TD CLASS="quote">
i've had the bottom end taken apart to replace the rod bearings and there was NO play in the rods at all....could it be a wrist pin or something worn badly???</TD></TR></TABLE>

Maybe you just have the same problem as the other guy; Combustion knock?
Maybe the ignition timing is all off.

Someone help me out here!

 

my engine has Bosch platinum plugs in it and accel 8mm plug wires and apc intake tube and cone filter and a airmass header with 21/4" mid pipe and stainless magnaflo muffler, the head has been ported and planed and new valve seals and a copper gasket kit....thats about all the info I can give you on my engine

 

Had your timing belt been changed?

 

Check your timing fellas.