random shaking and pinging
Thread Starter
|
Laughing Gas
Joined: Mar 2009
Posts: 1,028
Likes: 0
From: long island
random shaking and pinging
i was beating on my truck a little today, and at a stop light it started to shake at idle and make a strange popping and rattling noise when i reved it. this lasted about a minute and then went away after i started driving. to be honest, i thought i blew the thing up. but my temp stayed cool and my oil pressure didnt change at all. however, i have had an exhaust leak coming from the manifold for a while now, so i am thinking that my intake/exhaust manifold is bad and caused the temporary shaking. any other ideas? truck in sig.
btw ive done the "6 litre" tune up, and cleaned throttle body, replaced throttle body gasket, replaced 02 sensor, etc
btw ive done the "6 litre" tune up, and cleaned throttle body, replaced throttle body gasket, replaced 02 sensor, etc
Posting Guru
Joined: Jul 2008
Posts: 1,250
Likes: 1
Seeing how the problem turned up after aggressive driving, I think it could be pre-detonation.
With the "6 litre" tuneup, you advance the timing quite a bit. What is your timing set at? Was the popping and pinging real pinging (knock)? When the engine is pre-detonating, it's going to run rough and you're going to hear a knocking/pinging sound (hence its names).
What grade of fuel are you running? I would try running a higher octane fuel through the system and try to reproduce the situation. If it doesn't occur, it's probably a ping problem.
If the above solves your problem, but you would like to run a lower grade fuel, try seafoaming the engine once or twice. Carbon deposits can really hold heat which will detonate the fuel before the spark plug fires.
With the "6 litre" tuneup, you advance the timing quite a bit. What is your timing set at? Was the popping and pinging real pinging (knock)? When the engine is pre-detonating, it's going to run rough and you're going to hear a knocking/pinging sound (hence its names).
What grade of fuel are you running? I would try running a higher octane fuel through the system and try to reproduce the situation. If it doesn't occur, it's probably a ping problem.
If the above solves your problem, but you would like to run a lower grade fuel, try seafoaming the engine once or twice. Carbon deposits can really hold heat which will detonate the fuel before the spark plug fires.
Thread Starter
|
Laughing Gas
Joined: Mar 2009
Posts: 1,028
Likes: 0
From: long island
i dont know what my timing is set at. it really sounded like the engine was knocking and pinging severely, but like i said it did not last long. i actually filled the truck with super and did not have the problem again. although as soon as i went back to regular, my mpgs have suffered, but i havent gotten any pinging. i will pick up a bottle of seafoam today and see if that works out. the truck was last seafoamed a few months ago.
Thread
Thread Starter
Forum
Replies
Last Post
curtis88
1997 - 2006 Expedition & Navigator
17
May 10, 2014 02:11 PM
Johnoolo
1987 - 1996 F150 & Larger F-Series Trucks
12
Mar 30, 2012 03:40 PM
jackfast1
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
4
Mar 12, 2004 04:14 PM
