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can you hear engine ping through the exhaust?


Rose2300

Well-Known Member
Joined
Apr 18, 2011
Messages
1,068
City
ID
Vehicle Year
1996
Transmission
Automatic
^^ because with my aero turbine, I thought it was rattling so i just put on a thrush welded muffler which is a lot quieter but it also sounds like its rattling, only quieter. And the rattle supposedly from the aero turbine "rattled" only under load and same with the thrush. any ideas??
 
First, suspect a timing problem.
2.3s have a knack for running after jumping a tooth on the timing belt.
It'll start and idle fine, but won't be able to adjust the timing enough to prevent pinging.
You'll need to check the timing with the SPOUT connector unplugged.

Another suspect is carbon build up.
Do a SeaFoam upper intake cleaning, according to the directions on the can, through the brake booster hose.

You may need new spark plugs.
The dual plug heads seem to get neglected and owners keep the plugs installed way too long. I see you only have 57k miles on that truck. I would at least remove, clean and re-gap those 8 plugs.

They do recommend the timing belt replacement at about your mileage, 60k. If this is a new to you truck, it probably hasn't been done. If it has air conditioning, they are more prone to timing belt jumping teeth. At your mileage and age, that belt is probably pretty stretched and could easily have jumped a tooth.

You could also disconnect the EGR valve's vacuum line (and plug the hose end fitting). See if driving it with the EGR disabled makes it ping less. If so, I suspect the EGR DPFE is bad and the computer just hasn't set a code for it. That can happen if the battery has been disconnected or the check engine light has been reset. The computer tends to accept marginal performance sensor outputs when that happens.

http://www.fordfuelinjection.com/?p=64 Read the paragraph called Failure Mode.
 
I seafoamed it a month ago so I know it's clean, and no smoke came out. the timing belt was checked and fine and my truck doesn't have ac. I suspected the plugs as well, and i'll change them as soon as I can. Any other things that would ccause a rattle like sound?
 
loose heat shields are prime suspects...like the one on the exhaust manifold...and there should be one on or above the cat...and my EGR pipe was loose (the one I fabricated was "sectional") and rattled against the firewall...
 
but the rattling got quieter when i put on a quiter muffler, so i don't think it's the heat shield
 

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