302 pinging under hard acceleration?
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302 pinging under hard acceleration?
I have a 93 F150 that has always had a slight ping under hard acceleration, or sometimes just climbing a hill. Just enough to bother me, not terribly serious. I run regular gas, and I've changed all the normal things, like plugs, wires, fuel filter, oxygen sensor, etc., and the only thing I've found that stops it is resetting my computer. I've done this a couple times, and once it relearns everything it runs great with no ping for a few weeks, and then the ping returns. Any ideas?
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302 pinging under hard acceleration?
check your timing it sounds like it could be advanced a little to far.try running super unleaded gas .
its all i run in mine
the pinging you are hearing can be valve clatter or detonation which is a condition that occurs when timing is to far in advance.
thi could burn a hole in a piston .
cw300mag(No Email Addresses In Posts!)
its all i run in mine
the pinging you are hearing can be valve clatter or detonation which is a condition that occurs when timing is to far in advance.
thi could burn a hole in a piston .
cw300mag(No Email Addresses In Posts!)
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Joined: Jul 2000
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302 pinging under hard acceleration?
You might try smearing some RTV where the plenum
bolts to the intake.I had a small vacuum leak there once and my 93 did the same thing . The dealership could not find it.Not even a factory
rep.It got so bad that it melted the end of the sparkplug off on the #8 hole.
bolts to the intake.I had a small vacuum leak there once and my 93 did the same thing . The dealership could not find it.Not even a factory
rep.It got so bad that it melted the end of the sparkplug off on the #8 hole.
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302 pinging under hard acceleration?
Replace the mass air flow sensor. It took three years and several trips to dealers before I forced a service manager to look at all the service bulltins for the 302 engine. I had replaced plugs and wires, coil, throttle position sensor,had the fuel system tested ($200 wasted). the sensor gets contaminated slightly but not far enough to set off a trouble code. Truck never ran better after replacement
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302 pinging under hard acceleration?
I have a 1988 F250 c/w 302 with the same problem.
Trouble code 22 (from what I remember) indicated MAP sensor out of range. I verified this with the simple test in the manual and replaced the sensor for < $100. Now runs great, no more pinging.
Trouble code 22 (from what I remember) indicated MAP sensor out of range. I verified this with the simple test in the manual and replaced the sensor for < $100. Now runs great, no more pinging.
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