Detonation
Lead Driver
Joined: Nov 2002
Posts: 9,555
Likes: 40
From: Concord, NC
Has it always pinged with the MAF swap and the A9L or did it just recently start? I swapped to MAF on my truck using an A9L and it pinged from the start. I never could get it to stop so I swapped back to the original system.
The Southernmost Mod
Joined: Dec 2004
Posts: 6,902
Likes: 20
From: Caracas, Venezuela
I don't remember reading it, did you even checked if there were any codes? if the problem has been created by a malfunctioning sensor it should point it out.
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Mountain Pass
Joined: Jun 2009
Posts: 248
Likes: 0
From: East Wenatchee, WA
So I pulled the codes,came up with 3.
15 - ROM test failure
85 - Canister purge
10
96 - Fuel pump secondary circuit fault / high speed fuel pump relay open
So this is the 2nd ECM that has popped the code 15, that means its toast doesn't it? What is causing it, its an A9L with a chip, first one was a HUG2 with the same chip. I had it reprogrammed for the new ECM.
Could the code 96 be causing my pinging?
15 - ROM test failure
85 - Canister purge
10
96 - Fuel pump secondary circuit fault / high speed fuel pump relay open
So this is the 2nd ECM that has popped the code 15, that means its toast doesn't it? What is causing it, its an A9L with a chip, first one was a HUG2 with the same chip. I had it reprogrammed for the new ECM.
Could the code 96 be causing my pinging?
Fleet Owner
Joined: Oct 2005
Posts: 20,783
Likes: 1,751
From: Kentucky
Code 15 does not necessarily mean the PCM is bad. Can you elaborate what the "chip" is for? Is it custom burned or an off-the-shelf model? In either case I highly suggest you remove it then see if the detonation problem goes away.
Thread Starter
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Mountain Pass
Joined: Jun 2009
Posts: 248
Likes: 0
From: East Wenatchee, WA
Custom burned for the engine, pretty sure I'm not supposed to take it out and run it without it, seems like they told me not to do that, something about going back to default settings maybe.
Fleet Owner
Joined: Oct 2005
Posts: 20,783
Likes: 1,751
From: Kentucky
"They" are correct and that is exactly what I am trying to do....get the truck back to running on default settings. The parts you listed on the engine are not that extreme that you could not take that chip out for testing purposes.