Ford 7.3L Power Stroke (1999-2003) :: Tuck Has Developed A Knock Once Fully Warmed Up
May 8, 2016
Over the past few week my truck has developed a knock once it has fully warmed up. At first I thought it was possibly injector knock and kind of got excited about the prospect of upgrading to larger injectors. Well, my short lived optimism came to an end today once I got ahold of my father's mechanics stethoscope. So today I let it fully warm up and like clock work the knock came back. After going over nearly every inch of the top end, nothing was producing what I was hearing.
So I crawled under the beast and located the source. Right where the bellhousing mates the the engine block is where the knock is definitely loudest. At first I thought it was louder in while in gear but today it didn't matter if it was in gear or not. I removed the bellhousing cover and inspected what I could see of the flexplate. Couldn't see and cracks or breaks but from what I see through google searches is that it cracks behind the spacer. Now my first thought is that it's the flexplate but I'm hoping more experienced people can tell me what they think.
[URL] ....
View 14 Replies
Advertisement
My new to me (2K miles now) 2013 F350 with 52k miles just developed a knock. Oil changed 600 miles ago, Oil level good. No codes or CELs ...
YouTube...
View 14 Replies
3.5 has engine knock coming from oil pan, gets louder when engine fully warmed up. Suspect connecting rod bearings. 99 Intrigue has 203K on it and otherwise in excellant condition. Is it possible to replace connecting rod bearings with engine in car. What is involved in removing lower crankcase after oil pan is removed. Car has been trouble free so far and would like to get another 60K out of it
View 5 Replies
OK--2001.5 1.8t Tip, 85k, nothing but Mobil1 since day one religiously. At around 81k miles the t/belt tensioner seized & let the belt jump and bend a few valves. Had VW do the repair under the p.t. warranty. Engine now runs very well again except there is a knock noise that sounds an awful lot like a crank or rod bearing. The noise is worse with the engine fully warmed up and in drive or reverse. Took it back to VW, they said it's a bearing in the a/c compressor. Sounded like B.S. to me, since the noise is no different with or without the a/c on. I picked up the car & removed the a/c belt at home & found the noise was exactly the same. I've about had it with VW on this issue. Been back 3 times with the noise complaint, & the noise is getting worse!!
View 1 Replies
So my truck a stock 2000 7.3 started smoking when I would start it up in the morning... figured it was a glow plug issue. Checked the relay it was good, checked the glow plugs found 2 were bad replaced them.
Thought I was done, well I started it up and took it for a drive. still smoked... thought no big deal I know some oil leaked into the cylinders doing the glow plugs.
Then it started rattling like a lift went out, no more smoke though because the truck was warm... shut it off at my buddies. Limped it "it actually still drives ok" 5 miles home.
From my research it sounds like an injector. I have tried a buzz test and they all sound the same.
View 2 Replies
I just replaced all 8 injectors in my 01 F550 with remans from FFD. I have noticed a constant knock at idle but truck runs great. Blowby has no pressure behind it, truck does not smoke. Does this sound like a problem unrelated to an injector?
It did not make this noise before replacing the injectors
[URL] .....
View 12 Replies
My late 99 has 161K, I am the 2nd owner and bought from the Original owner. It is stock with no tunes. Auto/4wd.
It has had an intermittent idle knock and recently has gotten much louder recently when used heavily with towing for summer camping in the 7K range up steep hills. The knocking goes away above 12-1500 rpm. There is no noise when the engine is cold. It seems heavily temp/load/heavy use dependent. If driven lightly, the knock is quieter but still present. The trans was recently rebuilt and new billet converter installed, made no difference so it's not that it would appear.
I rec'd blackstone last week and the results are excellent. Running the cyl contribution test while hot in drive at idle reveals cyl 8 is running 4.9 to 5.4 Perdels. #3 is 2.2 to 2.8. 1,6,7 are 0. 2 is .6 and 5 is .4.... I haven't checked bolt torque yet. My question: Is #8 "fixable" potentially with bolt torque? Is it considered too far gone and should just be replaced?
View 14 Replies
2000 F250 7.3L ZF 6spd 4x4 regular cab long bed 253k
DP F6 chip, 4" exhaust, WW2, EBV delete
I run 5w40 Rotella Synthetic. Oil was changed about 1,000 miles ago. I also added a quart of Hot Shot stiction eliminator. I use Power Service and Stanadyne lubricity in every tank. Fuel filter is new.(motorcraft)
For a month or so its been acting weird. I get a stumble/miss/stutter, at random, but mostly under hard acceleration and high rpm (specifically approx 2500-2800rpm). It will also do it on decel when I lift after accellerating . Recently, I noticed it is also idling roughly. The engine is shaking and it feels like a miss. When it does its "thing" it sounds like a single "knock". Occassionally, it sort of sounds like an injector "buzzing". I've been using the "stock" tune for the last few weeks, to minimize any chance of engine damage, as I have to drive it. Turning up the chip makes the problems more noticeable and happen at a lower rpm. The truck has plenty of power, and pulls hard, except for the "stutter". If I hold my foot in it to "push through" the initial stumble at 2500 or so, it will keep going a few hundred more rpm, and then really start bucking.
There are no meaningful codes. I DO have:
EBV related soft codes - makes sense since its deleted.
Overboost related codes- from turning the chip up - won't happen in stock setting
A soft code for the back pressure SENSOR. I have a new one and will be cleaning the tube when I get a chance. I unplugged the sensor and it made no difference in the miss issue.
I have recently done the following in pursuit of a solution to all this:
New IPR (autozone) valve and pigtail
New ICP (motorcraft) and pigtail ( sensor had oil in it)
New CMP and pigtail. (2 actually. First a standard pc139 for the obs, and currently a Napa echlin correct for '00) No change. Although it initially had the dreaded Ford small head light grey sensor and failed cct for #3 & 8. After the cps change, it passed cct.
Accellerator Pedal Position Sensor. It would not read any higher then 3.95v at wot, and only 0.50v at idle, so I installed a new one. After adjusting it a little, I have 0.76v at idle, and 4.02 at wot. Didn't affect the stumble issue, but it seemed to greatly improve/eliminate my parking lot speed "bucking".
I just did the UVCH's. The passenger side was pretty much unplugged. But they all looked good. No burnt, melted,or chafed wires anywhere. I probably could have just plugged it back in, but I changed both sides with new Motorcraft parts anyway. I did the gaskets and the uvch, but not the engine side harness/pigtail, as they looked ok. I also did the 0.50 mod as a preventative measure. After seeing the unplugged harness, I really thought this would be the end of the problem, but its not. Very frustrated.
As a side note, I was surprised to see that I have 8 AD injectors, and not an AE in cyl 8.
I have an old outdated snapon scanner. Its only good up to '99, but I am able to scan my 2000 as a '99. I think I'm missing some pids though.
I can do cct and buzz test, but no PERDEL readings.
As far as ICP, it idles at about 450psi, at approx 12% IPR dc. On a brief 2nd gear wot run, it will hit (and hold as long as I have road to stay in it) a little over 2900psi, at 41-42% IPR duty cycle. I did notice, during these near instantaneous stumble events, ICP would flutter on the scanner about 75-100psi. Its almost too quick to even see it.
View 14 Replies
I have a 1999 Dodge Ram 1500, 5.9L. My problem is it will not idle until the engine is fully warmed up. When I first start it, I need to keep my foot on the gas, if I let it go it dies.
View 1 Replies
I have an '03 that misfires. The FICM was replaced around a year ago. FICM volts are at a steady 48. I recently change oil and used a Ford oil filter and cap with new o-ring. I also had the starter changed recently. It now spins over so fast, it reminds me of a gas engine without spark plugs! It starts up every time with no trouble, has plenty of acceleration, and seems to run great, except for the misfiring. It seems to misfire worse when warmed up.
I added some good diesel additive to the fuel, hoping that may work, but it did not. I've been doing some reading in different places and am thinking of disconnecting the ICP sensor and see if it works. I also am considering trying some RevX, or similar stiction additive, but from what I've read, stiction is a cold start and chugging problem, of which I have neither. I have a ScanGuageII with many of the X gauges programmed in, but I am not quite sure what direction I should go.
View 3 Replies
2005 F250 6.0L ... My truck is running really rough when the engine isn't all the way quite warmed up. once the truck is fully warmed up to normal running temp it runs good. I am getting four engine codes. P0672, P0673, P0674, P0676 These codes say 2,3,4, and 6 glow plugs have a open circuit. Can this be the cause of my problem?
View 7 Replies
2005 F250 195k miles. The truck has developed a howling noise comeing from what sounds like the driveline. It is most apperant at slow speeds with the windows up. It almost sounds like tire growling on the pavment but I can also hear it driving through the grass.
The last vehichle that i heard this from was my dd and ended up being a pinion bearing.
I put it on jack stands, removed the tires axles and driveshaft, spun the pinion yoke by hand it feels smooth. I also checked the rear hub bearings and they feel fine also. With the axles out and it up on jack stands i ran the truck and could still hear the noise. It almost sounds like it is comeing out of the T case output. The T case is a NP 271(manual shift).
View 14 Replies
Have a heavy steering feel on their 2010's with the 215 45/17 tires? It seems much heavier than previous Prius's and also have noticed that mine when it is really cold the steering wheel gets a little twitchy until it is fully warmed up.
View 12 Replies
I have a customer with a 2011 that has a ticking noise that developed into a engine miss with no fault codes. His mileage has dropped from 18 mpg to 14.5 . Heard the noise more pronounced in the left bank. Tonight I disassemble the engine and found the rocker arms by the pivot ball are showing signs of recent wear looks as if they had a die grinder taken to them. The rockers spear loose? The truck has over 100k on it.
View 6 Replies
About a week and a half ago I took my 2008 ISF to Lexus to have them check out the ticking noise. My car has 63K miles on it and I notice the ticking noise after it is fully warmed up. I normally have just been driving it in Sport-Manual too. The sound seems to come from the driver's side fender well area and I hear it best when it is in drive in my garage or at a drive thru.
At first Lexus couldn't duplicate the sound even after driving the car. So I went to the dealership and drove the car about 10 mins for them to hear. The service advisor and a technician heard it this time. They had to call the regional Field Technical Service rep for direction on how to proceed. The FTS person recommend swapping the driver's side high pressure fuel pump to the passenger side to see if the noise followed the pump. I guess they've had problems in the past with the high pressure pumps on the LS models. I again went down to the dealer to drive the car and the noise stayed on the driver's side.
View 14 Replies
I just bought this truck yesterday. During the test drive and everything it seemed all fine. After all the paperwork and the truck was actually mine. I noticed once it is all warmed up it seems to have a slight knock/tick? and a slight miss to it. I shot a couple videos, one up underneath where it sounds like most of the noise is coming from. Could it be an exhaust leak? Or is it something internal? Like the Cam Phasers, or a rod or something!
Here is a video around the exhaust area.
Here is up underneath the truck.
View 5 Replies
When car is fully warmed up, I notice in Sport+ (manual mode) when accelerating in 2nd gear right around 2000-2200RPMs, I get a slipping/hesitation before it corrects itself and is fine. Mostly with slow acceleration...fast acceleration doesn't really trigger this.
Also when decelerating and coming to slow stop, sometimes it jams/jams into first gear on its own. Doesn't happen all the time but sometimes.
Overall, I still like the tranny and finding which mode works best in which situation like bumper2bumper traffic, light traffic, slow driving, etc...
View 14 Replies
The car: 1994 toyota celica GT 2.2L automatic
Here's the problem: car starts fine when cold. When fully warmed up, if i stop to go to the store or something, and then start it after like 20 - 30 minutes it will start and the idle will be fluctuating between 800 and 400 for a few minutes and then even out. sometimes it will actually start up and die immediately, in which case i can save it by giving it gas for a few seconds and then it's fine.
What I've done so far: plugs (NGK), wires, cap, rotor, fuel filter (toyota), (checked air filter. still clean), tried cleaning the throttle body and IAC with some deep creep spray while on the car (not much effect).
View 14 Replies
I read a similar post but no resolution. My '05 Equinox starts fine most of the time, but when I make a quick stop before its fully warmed up I have to slightly depress the accelerator to get it to start. Now I know with fuel injection this should't be happening but its been the case almost since the day I bought it. GM changed out the software in the computer and that seemed to work for a while, at least long enough for the warranty to end. It doesn't bother me but my wife wants the car now. What's up?
View 1 Replies
With about 32K miles, I started getting a knock in the morning that would go away when warmed up. When I took the car in for service, I mentioned it and the service adviser said, it sounds like the timing chain tensioner leaking down, we have seen that.
Well it was not the tensioners, I was informed that, it was low oil pressure that did NOT trigger the oil light or any warnings, and my main bearings and a rod bearing were shot, it seems that the oil pump was not putting out as it should. Supposedly, it was only putting out 10 PSI. Oddly enough once the engine warmed up, there was no lifter/tappet noise that would indicate low oil pressure that I have experienced in the past with other engines.
The oil has been changed on time, the oil was clean, and the engine was not abused. Other than this the car ran fine. So the short block was replaced under warranty. This is a 3.5 V6.
This is quite disturbing, that some type of low oil pressure message or idiot light was not flashing on my dash. I have seen oil pumps from other manufacturers produce low oil pressure if the pressure relieve valve was stuck open.
View 12 Replies
In the morning, she starts great. Right up. And that's the least time she'll start until tomorrow's morning. Once in a while I'll turn the key and nothing happens, all of my lights are on like normal, but once I turn the key to start, absolutely nothing happens. Next morning, started right up. I can't leave her running everywhere I go. This is my first diesel, I just bought her with 265k miles, looks like she was well taken care of. But she doesn't like to start since the day after I bought her. New alternator because Ford told me, battery light doesn't come on, she still won't start once warm.
View 14 Replies
