7.3L Power Stroke Engine and DrivetrainDiscussion of the 7.3L Power Stroke diesel engine and drivetrain in the 1999-Up Super Duty trucks and Excursions. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 7.3L Power Stroke engine.
Hey guys I have a 99 450 powerstroke that started to make a noise in the motor like someone is banging it with a hammer. This knocking starts at a idle and continues with the rpm of the motor it stays at the same level but will not go away. the truck starts and runs fine still has plenty of power. if it was not for the noise you would think nothing was wrong with it. it has been doing this about 2 weeks now, i changed the fuel filter and air filter and oil with rotella 15w-40 any idea's? do you think i should be looking for a new motor? any help would be gratefull thanks
Do a search on cackle and you'll find a wav file that lets you hear what it sounds like..... To me it sounds like a hammer hitting steel. ie. TANG, TANG, TANG...
I put on a high pressure oil cross over and a ITP pre fuel pump mod and it mostly went away.....
From everything I've read, it's not something to be overly concernd about.....
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2002 F-250 XLT CC SB\HPX\ITP prepump mod\Harpoon\DI 65psi fuel shim\4" SS turbo back Magnaflow\Fumoto\FTVB\Edge Evolution2\Zoodad\2008 Diff cover
I doubt it is cackle. Cackle's knock is at idle only. Knocking at higher rpms is most likely an injector.......or things you don't want to think about.
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Here is most of what you need to know on getting your 7.3L started and how to operate it in the cold winter months. These posts use to readily available, but they've been hid in a subforum top of the 7.3 Power Stroke Engine and Drivetrain forum. Winter Operation (How I Do It) Hard/No Start? Check here first
I'm with Cool_Canuck. Here's what Ford has to say:
In some cases, drivers may notice a "cackle" sound while the engine is at idle and normal operating temperature. The cackle sounds like a rod knock coming from the driver-side rear of the engine. Typically, the cackle noise goes away when the driver accelerates off of base idle, and returns again when the vehicle stops or rests at base idle. Cackle often can show up at about 1,200-rpm under a slight load, not just at idle. A true cackle sounds different than familiar "knock" diesel engines make during normal combustion, which is loudest when the engine is cold. Unlike the knock, the cackle will come and go intermittently (at idle, versus while driving) and will increase in intensity as the engine warms up to operating temperature.
A cackle concern can be annoying, but be assured that it does not damage the engine or decrease the engine performance or fuel economy
In mature vehicles, it is likely that the onset of cackle can be traced to a loss of fuel pressure caused by:
• A restricted fuel filter.
• A fuel pump failure.
• Air injected into the system on the suction side of the fuel system
My '02 cackles when it's warmed up and usually at or near idle. No noise when cold or at higher RPM's
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Cool_Canuck</div><div class="ubbcode-body">I doubt it is cackle. Cackle's knock is at idle only. Knocking at higher rpms is most likely an injector..... </div></div>What you been smokin'. Cackle is most noticeable at about 1500-1800 rpms and may occur at any RPM but be difficult to hear because of the high frequency or other engine noise. Idle knock is totally different.
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2002 F350 Lariat CC 4x4 Auto 4.10 DRW, DP-Tuner F5 live tuned stock, quiet, 40dd, 40, 60, 80 tow, 80e and 120r, B&W GN, BrakeSmart, 'pooned tank, tank and pre-pump mods, 2µ Dahl 100 filter, regulated return, BTS dual HPOP, AC singles with EDM 34 lpm nozzles, AIS, H2e, Spearco 6.0 IC, Hypermax 3.5" dp--> MBRP 4" 304SS exhaust, BTS tranny, 203º T-stat, Chevron ELC, coolant filter, Oilguard bypass with Schaeffer 9000, WranglerNW 200 amp alternator & Optima group 31 batteries, Nippon-Denso starter, SPA gauges, SteveRacer mods, Hella 80/100W 9007s, Hella Micro DE foglights, 1000FF driving lights, 220W backup lights, Stancor contactor, Michelin XPS Traction tires, X-Springs, Bilstein shox, custom bumpers but otherwise stock. Nov 30 '99 build engine with 16 K miles, Fluidampr, Comp Cam 910 springs, Melling LPOP and ARP headstuds. Alien-Patrol Customer Service Sucks!
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: kennersons</div><div class="ubbcode-body">come on guys any ideas?? </div></div>Time for pre-pump and in-tank mods. Most likely your quick connect fittings are leaking but the fuel pickup could be contributing as well. Add a regulated return if you are so inclined. Your engine will thank you.
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2002 F350 Lariat CC 4x4 Auto 4.10 DRW, DP-Tuner F5 live tuned stock, quiet, 40dd, 40, 60, 80 tow, 80e and 120r, B&W GN, BrakeSmart, 'pooned tank, tank and pre-pump mods, 2µ Dahl 100 filter, regulated return, BTS dual HPOP, AC singles with EDM 34 lpm nozzles, AIS, H2e, Spearco 6.0 IC, Hypermax 3.5" dp--> MBRP 4" 304SS exhaust, BTS tranny, 203º T-stat, Chevron ELC, coolant filter, Oilguard bypass with Schaeffer 9000, WranglerNW 200 amp alternator & Optima group 31 batteries, Nippon-Denso starter, SPA gauges, SteveRacer mods, Hella 80/100W 9007s, Hella Micro DE foglights, 1000FF driving lights, 220W backup lights, Stancor contactor, Michelin XPS Traction tires, X-Springs, Bilstein shox, custom bumpers but otherwise stock. Nov 30 '99 build engine with 16 K miles, Fluidampr, Comp Cam 910 springs, Melling LPOP and ARP headstuds. Alien-Patrol Customer Service Sucks!
Whoa there horse2. Gave up smoking a while back (some days though). We are talking "Idle Knock" here. Part of the cackle problem and if you have ever heard it, you will not forget it. Sounds like the bottom end is gonna fall out right there in the driveway. Scared the cr-p out of me when mine did it. It is different than the ball pen hammer rattle in that 1,600 rpm range. Mine does one that nicely on winter fuel.
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Here is most of what you need to know on getting your 7.3L started and how to operate it in the cold winter months. These posts use to readily available, but they've been hid in a subforum top of the 7.3 Power Stroke Engine and Drivetrain forum. Winter Operation (How I Do It) Hard/No Start? Check here first
I too would start with pre-pump and tank mods, I did the ITP regulated return and Airdog and the truck runs much smoother and is quieter.I still have to install the Fluidampr and Mobil 1 and hopefully will notice even smoother operation.
The X-over oil line helped mine, then the tank mods and fuel regulator system from ITP made mine very quiet.
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2002 F-350 SRW Lariat,4X4, PSD with too many goodies to list. 182k and a very strong 7.3. SOLD
2008 F-250, SC Lariat, 4X4,Shortbed, Pueblo Gold/black, V-10, 4.10, auto, Delivered on 9/7/07, great looking rig. South Texas bumpers front/rear, Air Raid Intake System, Diablosport Predator, Husky's, JJ's, Ford alarm/remote start, Marathon seat covers, Sirius, PIAA, Access cover, Weatherguard tool box, Rhino liner, Michelins, Duraflap mud flaps, Escort 9500i, MagHytec rear dif cover.
2007 Lincoln LT (wifer's grocery getter),Superchip,K&N dropin, Leer Browning Special
1996 Ford Bronco EB; almost stock
2007 Kubota 900 RTV diesel with goodies. pappy's truck
I just posted about the same type of noise. Looks like this might be about the same thing because mine is right around 1500-1800RPMs. I was thinking about the FASS and just a new fuel filter, think that might do it? Good info here, thanks.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: cpaine</div><div class="ubbcode-body">I just posted about the same type of noise. Looks like this might be about the same thing because mine is right around 1500-1800RPMs. I was thinking about the FASS and just a new fuel filter, think that might do it? Good info here, thanks. </div></div>The FASS system will help quiet your rig noticeably by ridding your fuel of entrained air. I have a reg. return,Airdog.Oil x-over and bellowed up-pipes.My engine is very quiet and smooth at all RPM's! FASS /Airdog also helps WOT from dropping fuel pressure with lifter pump.
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'02 Black F-350srw Lariat. 7.3/CC/SB/OR. BTS tranny with 6.0 cooler,coated TN bb1.00 w/Hi-flow outlet,Non-EBP ped,BWD coated/bellowed up-pipes,D.P Tuner.F5(stock,Hi-idle,60tow,80econo,120race),4" SS Magnaflow,BDS stabilizers ,Fluidampr,AFE Stage2w/PG7&pre-filter,Spearco 6.0 IC,PML pan,HPOX,Airdog,ITP reg.return,MAP Maximizer,8 spring front, BFG 315/75/16 AT's,DTS 4.56LS gears,Mag-Hytec cover,Dieselsite SS ESOF lines,coolant filter,203* stat w/billet&Fleetrite,Optix fuel on column,Ultra-Lite trans,pyro,boost on pillar.All fluids Mobil1,Energy polys,Centramatic,Fumoto,Billet,Line-X,Husky box,Extang,EGR,Alpine,Viper,Dynamat,Sirius,PIAA,Hu sky-Liner,Bilsteins. Door ding,overhead console,Snowman,Zoodad,Harpoon,AIH,Marinco,CCV,foi l mods. Hawks and Powerslot cryo's
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: ELLIOT02</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: cpaine</div><div class="ubbcode-body">I just posted about the same type of noise. Looks like this might be about the same thing because mine is right around 1500-1800RPMs. I was thinking about the FASS and just a new fuel filter, think that might do it? Good info here, thanks. </div></div>The FASS system will help quiet your rig noticeably by ridding your fuel of entrained air. I have a reg. return,Airdog.Oil x-over and bellowed up-pipes.My engine is very quiet and smooth at all RPM's! FASS /Airdog also helps WOT from dropping fuel pressure with lifter pump. </div></div>
Thanks for the info, I'm going to get one when I have the extra cash, thanks.
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