Engine Pinging
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Junior User
Joined: Dec 2003
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Engine Pinging
I hope some can point me in the right direction.
I have a 1996 F-150 V-8 302 with 127,000 miles and here in the last year I here valve pinging every time I fill up with new Ethanol added gas. Now, if I add octane treatment, seafoam or fill up with super unleaded I do here it. Its mainly when I get into it to pass someone or drive up a steep hill. Could there be something wrong with the engine? What about the timing should I increase it or decrease it.
Any idea's will help.
Thanks
I have a 1996 F-150 V-8 302 with 127,000 miles and here in the last year I here valve pinging every time I fill up with new Ethanol added gas. Now, if I add octane treatment, seafoam or fill up with super unleaded I do here it. Its mainly when I get into it to pass someone or drive up a steep hill. Could there be something wrong with the engine? What about the timing should I increase it or decrease it.
Any idea's will help.
Thanks
New User
Joined: Feb 2003
Posts: 7
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From: Manalapan
I had that problem, really noticeable wit regular unleaded gas. I noticed that if I used 93 octane gas, problem got better. Also where you get the gas I noticed makes a difference. Any grade of she!! in my truck get the ping and loss of pep in the engine. Exx/Mob truck runs good, as well as Hes$
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Junior User
Joined: Dec 2003
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Matt2654,
I'm going to fill up in the morning and maybe I will run a tank of Super Unleaded through the engine and see how that goes. I have been buying gas from my local Murphy's gas station since they give me three cents off per gallon.
Thanks for your Reply
I'm going to fill up in the morning and maybe I will run a tank of Super Unleaded through the engine and see how that goes. I have been buying gas from my local Murphy's gas station since they give me three cents off per gallon.
Thanks for your Reply
Moderator
Joined: Nov 2007
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From: Denver Metro Area, CO
Your engine is controlled by a computer, and the computer should detect the pinging (via the knock sensor) and retard the timing to try and compensate.
For whatever reason, that's not happening.
Pull the codes from your engine's computer and see what it thinks is going on.
For whatever reason, that's not happening.
Pull the codes from your engine's computer and see what it thinks is going on.
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Fleet Owner
Joined: Oct 2005
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From: Kentucky
Ford used a knock sensor on the 4.9L I6 and 5.0L V8s for several years including your 1996. As mentioned before check for codes. The knock sensor should be telling the PCM to pull some timing when the engine is pinging.
It would also be wise to check the base timing as well.
It would also be wise to check the base timing as well.
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Logistics Pro
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From: Mexico, Missouri
X2 on checking the Base Timing and checking for any stored codes. Another thought is a tune-up. I haven't read this in the topic. Anything with the Emissions system been disabled? EGR can cause similar problem's if it has been disabled/blocked. It helps to reduce cylinder combustion temps which can lead to detonation and lower mpg's.
Have you ever Seafoam the intake? Might be a good idea since you are spending money on octane booster and premium fuel. It's $9 for the bottle and the bottle goes far.
Have you ever Seafoam the intake? Might be a good idea since you are spending money on octane booster and premium fuel. It's $9 for the bottle and the bottle goes far.
Cargo Master
Joined: Jan 2004
Posts: 2,512
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From: Cook Forest and Irwin PA
your truck has the divorced tfi module (not frying on the distributor) but that does not mean they cannot go bad. when my tfis (I divorced my non-divorced tfi module) start, they manifest as ping.
for grins - make sure the cap and rotor are top shape. I seriously recommend the ACCEL units - much tighter tolerances than the junk that passes for OEM nowadays.
then for grins route the #8 plug wire OUT of the loom. you might be getting 7-8 crossfire as the plugs and wires age.
for grins - make sure the cap and rotor are top shape. I seriously recommend the ACCEL units - much tighter tolerances than the junk that passes for OEM nowadays.
then for grins route the #8 plug wire OUT of the loom. you might be getting 7-8 crossfire as the plugs and wires age.
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