Knocking, possible #8? - Ford Powerstroke Diesel Forum

 
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post #1 of 10 Old 03-27-2012, 08:02 PM Thread Starter
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Knocking, possible #8?

A few months ago, I had my truck scanned with the Ford Rotunda software. #8 cylinder came up on the computer but I didn't notice the truck running any different. Just recently, (250 miles ago) I decided to try the 100 performance setting on my chip for a whole tank to see what kind of mileage I would get. I've dogged the truck a few times between now and then and since i've had it on the 100 perf setting but I drive it as if it were in stock setting most of the time. Tonight when I pulled up to my house, I noticed what sounded like a knock. I left the truck running, popped the hood, and I could hear a knock coming from the passenger side towards the back of the engine. My question is, can I just throw an injector in, or is #8 cyl toast and the whole engine need a rebuild?

Truck is in sig, 117k miles. If you need more info, let me know.

Tom
2001 F250 7.3 auto 4x4 Lariat CCSB
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4" MBRP exhaust
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post #2 of 10 Old 03-28-2012, 11:59 AM Thread Starter
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Guess i'm a noob, I assumed #8 was up against the firewall on the passenger but it's not. Now i'm wondering which one it is!

Tom
2001 F250 7.3 auto 4x4 Lariat CCSB
6637 intake
4" MBRP exhaust
PHP tunes
Foil delete
EBPV delete
ISSPRO Boost, Pyro, and Trans Gauges
Strictly Diesel Pre-Pump Filter/In-Tank Kit
Strictly Diesel Regulated Return and Fuel Bowl Delete
High Flow Banjo Bolts
Nitto AT's 305/70R16
2009 Pontiac G8 GT
Intake, Exhaust, Tune
Camaro 20's, Camaro SS Brembo's
1997 VDub Passat GLX VR6
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post #3 of 10 Old 03-28-2012, 12:06 PM
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Passenger side is 1-7. It could be a few things but pulling the valve cover and pulling the plug on each injector may help you track down the problem.

97 F-250 350/200 Hybrids, Intercooled, Irate S468 T-4 Turbo, Irate comp Fuel system, BTS Twin pumps, BTS trans, STOCK RODS
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post #4 of 10 Old 03-28-2012, 05:44 PM
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Toms01PSD- I can't wait to hear the answer, I've got an 01 and notice the same thing intermittently.
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post #5 of 10 Old 03-28-2012, 06:23 PM Thread Starter
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Where are you located?

Tom
2001 F250 7.3 auto 4x4 Lariat CCSB
6637 intake
4" MBRP exhaust
PHP tunes
Foil delete
EBPV delete
ISSPRO Boost, Pyro, and Trans Gauges
Strictly Diesel Pre-Pump Filter/In-Tank Kit
Strictly Diesel Regulated Return and Fuel Bowl Delete
High Flow Banjo Bolts
Nitto AT's 305/70R16
2009 Pontiac G8 GT
Intake, Exhaust, Tune
Camaro 20's, Camaro SS Brembo's
1997 VDub Passat GLX VR6
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post #6 of 10 Old 03-28-2012, 06:34 PM
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South Georgia
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post #7 of 10 Old 03-28-2012, 07:14 PM Thread Starter
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If you were closer I would say we could compare. How many miles on your truck?

Tom
2001 F250 7.3 auto 4x4 Lariat CCSB
6637 intake
4" MBRP exhaust
PHP tunes
Foil delete
EBPV delete
ISSPRO Boost, Pyro, and Trans Gauges
Strictly Diesel Pre-Pump Filter/In-Tank Kit
Strictly Diesel Regulated Return and Fuel Bowl Delete
High Flow Banjo Bolts
Nitto AT's 305/70R16
2009 Pontiac G8 GT
Intake, Exhaust, Tune
Camaro 20's, Camaro SS Brembo's
1997 VDub Passat GLX VR6
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post #8 of 10 Old 03-30-2012, 04:25 PM Thread Starter
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I have a sticking injector. Started it today and it idled like it had a big cam in it. Started accelerating out of my driveway and it vibrated and ran rough. Now to figure out which one(s) are messed up!

Tom
2001 F250 7.3 auto 4x4 Lariat CCSB
6637 intake
4" MBRP exhaust
PHP tunes
Foil delete
EBPV delete
ISSPRO Boost, Pyro, and Trans Gauges
Strictly Diesel Pre-Pump Filter/In-Tank Kit
Strictly Diesel Regulated Return and Fuel Bowl Delete
High Flow Banjo Bolts
Nitto AT's 305/70R16
2009 Pontiac G8 GT
Intake, Exhaust, Tune
Camaro 20's, Camaro SS Brembo's
1997 VDub Passat GLX VR6
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post #9 of 10 Old 03-31-2012, 08:44 PM Thread Starter
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Threw a 'Service Engine Soon' light today also. Would injectors do that?

Tom
2001 F250 7.3 auto 4x4 Lariat CCSB
6637 intake
4" MBRP exhaust
PHP tunes
Foil delete
EBPV delete
ISSPRO Boost, Pyro, and Trans Gauges
Strictly Diesel Pre-Pump Filter/In-Tank Kit
Strictly Diesel Regulated Return and Fuel Bowl Delete
High Flow Banjo Bolts
Nitto AT's 305/70R16
2009 Pontiac G8 GT
Intake, Exhaust, Tune
Camaro 20's, Camaro SS Brembo's
1997 VDub Passat GLX VR6
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post #10 of 10 Old 04-08-2012, 02:39 PM
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i worked on a 97 that had a similar problem, it would knock like crazy from the #7, and eventually wouldnt start or would be really hard to start and would run terribble, threw me some codes that just didnt really add up to an injector, but i replaced it anyway and it didnt do anything. after a little more work it turned out to be a fuel pump that went bad, so before dropping money on an injector i would check to make sure your fuel pump is good.

2003 Excursion Eddie Bauer 7.3
6 Inch ProComp Lift, 315/75/16 BFGoodrich All Terrain Tires, BTS Transmission, 175/100 P.I.S. Injectors, PMF Traction Bars, Garrett 38r, International Up Pipes, Dyno Proven Tunes, 6.0 Transmission Cooler, CCV mod, MBRP 4" Turbo-Back Exhaust, RiffRaff Over Boost Code Regulator, Moto Metal MO951 Black Rims, Dual Sky Jacker Steering Stabilizers, GlowShift Gauges, Mile Marker 449SS Lockout Hubs, 6637 Intake.

Putting this old PMR truck to the test....
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