dieseling sound (high end)
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Joined: Apr 2010
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dieseling sound (high end)
Hey guys,
I have a 93 ram van with a 318, 3spd auto. High mileage. Have not ever heard this before until lately, but when driving at about 65, and then giving more gas, I hear a dieseling noise.
Or when going up hill. Happens worse when fully warmed up. And also when I gas it real good at any speed.
I dont want to hurt anything - any help would be appreciated.
I have a 93 ram van with a 318, 3spd auto. High mileage. Have not ever heard this before until lately, but when driving at about 65, and then giving more gas, I hear a dieseling noise.
Or when going up hill. Happens worse when fully warmed up. And also when I gas it real good at any speed.
I dont want to hurt anything - any help would be appreciated.
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Joined: Aug 2007
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What you are hearing is called pinging. It is not good for a gas engine. Avoid it. It is cured by using higher octane fuel. To avoid spending more on Hi octane fuel, you might try adjusting the timing, If possible on your year. I have heard pinging can be caused by excessive carbon build up on the pistons, or the rest of the combustion chamber.
Put a can of Seafoam in the tank, and get a spray can of Sea foam Deep Creep, and spray that down into the intake with the already hot engine running, and your nose pointed upwind.
This will probably destroy the 02 sensors if you do not remove them first, and it will blow out a cloud of foul smelling smoke. You will have to feather the throttle and spray so the engine does not stall.
Afterward, reinstall the 02 sensors, disconnect the battery for a while, re connect it, and then drive it like you stole it till the computer relearns your engine.
Put a can of Seafoam in the tank, and get a spray can of Sea foam Deep Creep, and spray that down into the intake with the already hot engine running, and your nose pointed upwind.
This will probably destroy the 02 sensors if you do not remove them first, and it will blow out a cloud of foul smelling smoke. You will have to feather the throttle and spray so the engine does not stall.
Afterward, reinstall the 02 sensors, disconnect the battery for a while, re connect it, and then drive it like you stole it till the computer relearns your engine.
Last edited by landyacht318; Jul 6, 2010 at 07:19 PM.
Record Breaker
Joined: Dec 2005
Posts: 1,412
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From: Nashville
OK a few things to try ...
1) New Autolite single platinum plugs.
2) Replace the PVC.
3) New cap-n-rotor (copper/brass since the aluminum kind pit and flake causing arcing and pinging like your problem sounds like.)
4) Yes, do the Seafoam. If you don't want to mess with the O2 sensors, just dump the can contents into a 1/2 tank of fuel.
5) Injector cleaner. Either STP or amazing enough, the WalMart SuperTech. Neither of these contain Methanol nor are alcohol based. The SuperTech stuff is made in NC.
6) Gunk motor flush treatment. Just use a 1/2 of a container since you have high mileage. Or a Seafoam flush treatment (full can) in the oil before changing. Either will work.
Check out Geno's Garage TSB/recall listing for your year (92-93) and check those things out too... http://dodgeram.info/tsb/0_old_ix.htm
1) New Autolite single platinum plugs.
2) Replace the PVC.
3) New cap-n-rotor (copper/brass since the aluminum kind pit and flake causing arcing and pinging like your problem sounds like.)
4) Yes, do the Seafoam. If you don't want to mess with the O2 sensors, just dump the can contents into a 1/2 tank of fuel.
5) Injector cleaner. Either STP or amazing enough, the WalMart SuperTech. Neither of these contain Methanol nor are alcohol based. The SuperTech stuff is made in NC.
6) Gunk motor flush treatment. Just use a 1/2 of a container since you have high mileage. Or a Seafoam flush treatment (full can) in the oil before changing. Either will work.
Check out Geno's Garage TSB/recall listing for your year (92-93) and check those things out too... http://dodgeram.info/tsb/0_old_ix.htm
Record Breaker
Joined: Aug 2007
Posts: 1,146
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I do not believe that just putting the seafoam in the tank will be as effective at cleaning the valves and combustion chambers as spraying the deep creep down the intake. The instructions say that the regular can of sea foam can be poured into the vaccuum line for the power brake booster. Supposively there are many U tube videos on how to do this, and many comments by those who have followed the directions with excellent results. I am not sure it will foul the 02 sensors. I have read so.
Once when my fuel pump failed, I drove my engine with TB cleaner for a couple hundred yards. Right after that my fuel economy took a dump till I replaced the o2 sensor. There are also ways to clean the 02 sensor of accumulated carbon, I believe, but I've never had access to the correct tools to remove it from my manifold without destroying it.
Once when my fuel pump failed, I drove my engine with TB cleaner for a couple hundred yards. Right after that my fuel economy took a dump till I replaced the o2 sensor. There are also ways to clean the 02 sensor of accumulated carbon, I believe, but I've never had access to the correct tools to remove it from my manifold without destroying it.