Detonation or losing a cylinder? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Natty · 03-22-2002, 11:32 AM

I hear a really low bass like thud when I am on the gas, depending on speed.
I am thinking it may be suspension, but I would like to know what it would sond like if it were detonation?
And how would I tell if I a, losing a cylinder?
Thanks
Jeff

wherezmytofu · 03-22-2002, 12:09 PM

if u think u lost a cylinder do a compresion test on each cylinder.....if one cylinder is lost the engine souldnt run smooth at all since the crank cycle will be uneven...also there should be a great lost of power!...like...say 1/4 power....detenation is very loud and ur car would just keep detornating....it would be like bam...done!...so probubly the suspension <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/hehe.gif" border="0" valign="absmiddle" alt=':hehe:'>

camppain · 03-22-2002, 09:21 PM

easiest way is to remove a plug wire while the engine is running if there is a significant power loss or idle vary then that cylinder is good once you remove a plug and the engine doesnt make any change then you found your bad cyklinder this can be due to a injector gone bad

03-22-2002, 11:32 AM	#1
Natty Zilvia Addict Join Date: Dec 2001 Location: Nashville, TN Posts: 944 Trader Rating: (0) Feedback Score: 0 reviews	I hear a really low bass like thud when I am on the gas, depending on speed. I am thinking it may be suspension, but I would like to know what it would sond like if it were detonation? And how would I tell if I a, losing a cylinder? Thanks Jeff __________________ 1991 White 240sx Fastback LE, rusty spoiler, weak driveshaft, exhaust rattle.... Rattles are just your cars way of saying 'I love you.'

03-22-2002, 09:21 PM	#3
camppain Will never get banned... Join Date: Sep 2001 Location: San Diego CA Age: 45 Posts: 1,510 Trader Rating: (0) Feedback Score: 0 reviews	easiest way is to remove a plug wire while the engine is running if there is a significant power loss or idle vary then that cylinder is good once you remove a plug and the engine doesnt make any change then you found your bad cyklinder this can be due to a injector gone bad __________________ -=-99 Sentra SE 5 speed-=- -=-95 240 SE 5 speed-=-

03-22-2002, 12:09 PM	#2
wherezmytofu BANNED Join Date: Nov 2001 Posts: 1,873 Trader Rating: (0) Feedback Score: 0 reviews	if u think u lost a cylinder do a compresion test on each cylinder.....if one cylinder is lost the engine souldnt run smooth at all since the crank cycle will be uneven...also there should be a great lost of power!...like...say 1/4 power....detenation is very loud and ur car would just keep detornating....it would be like bam...done!...so probubly the suspension <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/hehe.gif" border="0" valign="absmiddle" alt=':hehe:'>