Ping during acceleration
Cargo Master
Joined: Jun 2013
Posts: 3,182
Likes: 15
From: Somewhere n North America
Failed Knock Sensor, or Wiring?
Is your timing advancing during acceleration?
Rich or Lean? Measure pulse duration at the Injectors.
Inputs to the EECM triggers Rich/Lean commands.
Is your timing advancing during acceleration?
Rich or Lean? Measure pulse duration at the Injectors.
Inputs to the EECM triggers Rich/Lean commands.
Thread Starter
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Laughing Gas
Joined: Feb 2015
Posts: 765
Likes: 1
I actually found some factory original Ford knock sensors, I ordered one yesterday. Theoretically could I try accelerating with the SPOUT disconnected to see if the timing is being advanced too much?
Lead Driver
Joined: May 2011
Posts: 5,790
Likes: 449
You haven't checked fuel pressure yet????
Need to check it under load. Engines will make gobs of power just before detonating themselves to death, so the "pulls good, fuel press must be good" test is not a good one. Check the fp!
Need to check it under load. Engines will make gobs of power just before detonating themselves to death, so the "pulls good, fuel press must be good" test is not a good one. Check the fp!
Cargo Master
Joined: Jun 2013
Posts: 3,182
Likes: 15
From: Somewhere n North America
I'm with '89F2urd, Fuel Pressure should be checked up front......
Cargo Master
Joined: Jun 2013
Posts: 3,182
Likes: 15
From: Somewhere n North America
I think the Timing stays @ 10 deg btdc, or where ever you have the Base Timing set when you accelerate with the SPOUT out.....
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Laughing Gas
Joined: Feb 2015
Posts: 765
Likes: 1
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Joined: Dec 2003
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From: Foothills of NC
Try these things...
Put a block off plate between the EGR and intake and try that.
Back up the timing some more until the pinging stops. See if the engine power is where it should be with that. With a 302 you could have a worn timing gear, but still have decent vacuum. To check to be sure, take the distributor cap off, then bar the engine back and forth and see how much you have to move the crank before the rotor starts to turn.
Change the O2 sensor since that is one thing that will constantly change the richness of the fuel. Yours could be leaning out too much, especially after running cleaner through the engine. The crud released from that could have coated it.
Put a block off plate between the EGR and intake and try that.
Back up the timing some more until the pinging stops. See if the engine power is where it should be with that. With a 302 you could have a worn timing gear, but still have decent vacuum. To check to be sure, take the distributor cap off, then bar the engine back and forth and see how much you have to move the crank before the rotor starts to turn.
Change the O2 sensor since that is one thing that will constantly change the richness of the fuel. Yours could be leaning out too much, especially after running cleaner through the engine. The crud released from that could have coated it.
Fleet Owner
Joined: Oct 2005
Posts: 20,789
Likes: 1,753
From: Kentucky
The fuel pressure should rise under load. 30 PSI under load is way too low. Fuel pressure should never drop below the idle condition fuel PSI. At full load/WOT it should be in the 40-45 PSI range.