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95 ram 1500 detonation

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Old 02-14-2012, 05:17 PM
camd94234 camd94234 is offline
Join Date: Sep 2011
Posts: 85
Post 95 ram 1500 detonation

ok so my brothers 1995 dodge ram 1500 5.9l 4x4 is detonating cylinder #8. what could it be? my dad has changed the cat because the cat was bad and he was driving around with the bad cat so could the driving around with the bad cat have made it so the #8 cylinder is detonating? i was thinking that the knock sensor could be gone but i was looking on autozone and they do not show a knock sensor for this model so i am stumped i have no clue what it could be? any suggestions???

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Old 02-14-2012, 05:25 PM
stewie01's Avatar
stewie01 stewie01 is offline
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Vehicle: 2001 Ram 1500 4x2 360V8
Location: Fredericksburg, Virginia
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Probably need to check out the plenum and PCV valve.
"This place is an X-file, wrapped in a cover-up and deep-fried in a paranoid conspiracy."
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Old 02-14-2012, 05:33 PM
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Matt Nickerson Matt Nickerson is offline
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Vehicle: '01 Ram 1500 4X4 5.2l 5spd
Location: Southern Massachusetts
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^What he said.
There's no knock sensors that's why autozone doesn't show 'em, so don't worry about that.

You're brother's truck is probably a little low on oil? If the plenum is blown, it will cause loss of oil, detonation, a bad cat, misfires, lack of power, etc... the new cat will go bad (after a while) if you don't fix the plenum/pcv, if that's the issue. So definitely look into it.
'01 1500 4X4 318 5spd Gutted Cat, Super 44, 2" HBS

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Old 02-14-2012, 05:37 PM
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gdstock gdstock is offline
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Vehicle: 1999 Ram 1500, 5.2L auto
Location: Austin, TX
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Looks pretty much like the plenum...So
Ram 1500, 5.2L, 2wd, hardened trans with Derale pan, Hayden trans cooler, kegger mod, SCT tuned. New metallic black paint, TCP e-fans, HS 1.7 Rockers, restored interior.
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Old 02-14-2012, 08:51 PM
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BigBlue83 BigBlue83 is offline
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Vehicle: 1998 dodge ram sport
Location: Hartford CT
Posts: 444

From everything ive read id 4th the motion of plenum two main sighns... Spark plug 8 and clogged cat
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