MISSING AND BACKFIREING THROUGH INTAKE! - Ford Powerstroke Diesel Forum
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post #1 of 9 Old 02-01-2008, 02:37 PM Thread Starter
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MISSING AND BACKFIREING THROUGH INTAKE!

Truck has been running good untill now! Started the truck up and it started backfireing through the intake and making an almost like pinging noise! WTF??? HELP PLEASE!
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post #2 of 9 Old 02-01-2008, 03:51 PM
allergic to hot weather

 
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sounds like valve problem to me
but heres a anyway

Keith in Alaska (lovin it)
94 IDI
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post #3 of 9 Old 02-01-2008, 04:31 PM Thread Starter
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Thanks man...anyone else??? My buddy will scan tomorrow and I will hopefully have a code or two to pull.
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post #4 of 9 Old 02-02-2008, 07:18 AM
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what year is it? you actually may have dropped a rocker. they do that actually quite a bit. not to big of a deal just replace the rocker assembly.
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post #5 of 9 Old 02-02-2008, 11:04 AM Thread Starter
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My truck is an early 99 with a wm chip, staight pipe, diy intake, fpr shim and wastgate pluged. Any other options??? thanks again fellas
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post #6 of 9 Old 02-03-2008, 01:45 PM Thread Starter
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So just pulled some codes and they are as followes...po 541 and po 640. anyone know what they mean? thanks
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post #7 of 9 Old 02-03-2008, 02:57 PM
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PO541 Manifold Intake Air Heater
P0640 Manifold Intake Air Heater

Keith in Alaska (lovin it)
94 IDI
95 7.3 ex cab L/B 4X4 (D66 stage 1s 4" Turbo back 6637 air filter and bully dog chip)
05 6.0 Excursion 4X4 (stock)
10 6.4 F350SRW CCLB manual trans (stock)


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post #8 of 9 Old 02-03-2008, 03:30 PM
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Those codes won't cause your problem. Those codes are because you don't have the AIH on the early 99. Time to pull the valve covers and do some detective work.

EDIT: sounds like you changed out your PCM.

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Last edited by Dirk; 02-03-2008 at 07:38 PM.
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post #9 of 9 Old 02-03-2008, 07:33 PM Thread Starter
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i know i was hoping it was something easy, which it still could be. i will be taring into it tomorrow night...i hope! i will keep you informed!
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