Ford F-150 - 1997-2003 :: 2000 - Engine Backfiring Through Intake At Startup
May 26, 2011
We have a 2002 F-150 4.6L 4x4. The engine went bad and we bought a new engine (remanned ATK). Had this engine installed and a year later it was bad and was determined it was a manufacturer defect so they sent a replacement engine under warranty.
We had this new engine installed. The mechanic fired it up and it backfired through the intake. They claim that the compression is good, the fuel pressure is good, and the timing is correct. Can they check these things when the truck is not running? The mechanic is completely frustrated with the situation...
Everything I read leads to a timing issue but they say they checked it so before I go in there screaming I want to make sure it couldn't possibly be anything else...
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Ok, I was reading the one on the V8s, but not sure with the V6s. First off, let me tell you what has been done. I replaced fuel and oil filters, Plentum seal, and bolts, replaced plug wires, and coilpacks, and the PCV valve. I can't remember what else I did, but it was before Spring Break last year when my daughter and I were taking a trip across the US to pick up a motorcycle and do site seeing. Anyways, before I did all of this, the truck was getting to the point where I could not get it over 45 or it would feel like the trany was going. When I pulled the plugs out, they were running lean. I have had my Check engine light pop on with the Cam Pos Sen, but I have replaced that. That code has never came back, but it is still running lean, and backfiring in the intake when leaving a stop. I am wondering if the fuel pump may be going out, or what else it might by. I work on older cars with carbs, so not all that sure with the injection stuff.
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I just replaced the engine in my F--150 with one from a van that had only 60K miles on it. It still runs rough and misses. Not as bad as the earlier engine that had dropped a valve. While trying to find the problem, I moved a large vacuum? hose at the rear of the engine maybe 1 inch diameter and it nearly fell off the barb at the back It is also connected at the other end to some type of small metal can. When I pulled on this it fell off and the engine died.
Also need the smaller 5/8 in diameter hose at front of air intake tube. I need a size or a pert number for this hose as I cannot crawl back onto the motor very many times due to a spinal problem. I would like to get this hose and then get under the firewall only one time. I am having issues with this truck, bought is used at auction running rough. Replaced engine with one that was supposed to be a good one, but it runs rough again..
I need to add that New platinum [plugs were installed and the coils were off the old engine that had maybe 50 miles on them and were from NAPA. I only hope htis hose is my problem. However I cannot find any part number or anything on it...
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I have a vehicle that came in on the hook its an 01 exploder4.0 sohc no start.. when cranking it will back fire through intake. no dtc's however its also showing all monitors not set?? dead battery erasing keep alive memory I don't know. Here's what i do know apparently it had gotten partial tune up all left side plugs and wires changed. All right side plugs and number 3 wire factory. I have plenty of fuel pressure. It appears that all cylinders have 150 psi for compression.
I changed all plugs and spark tester is showing there is spark at the plug, (yes at all) just cranks and cranks and then back fires. I also have removed front ho2s to rule out blocked cats, wires are not crossed. I have an rpm signal which should have been evident when I had spark and injector pulse. have not changed the wires nor the coil which is a 6 pack coil. (Boss refuses to get them for me since i have spark )even though I told him there was some arcing.
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97 f250 4.6l engine pegs the temp gauge after start-up. the oil pressure light comes on then after a few miles down the road anti-freeze blows out the pressure cap (15LB) then the temp goes down ,the oil light goes off and everything is normal. no its not the thermostat, i changed that and it still does it. whats up with that?
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I have a 98 F150 Supercab 4x4 with 4.6 and an auto trans. I have 107,000 miles on the truck. Recently developed a engine "tick". Upon start up the "tick" is very noticeable. Seems to go away after its been driven a few miles and everything comes up to operating temp. I have checked the exhaust manifolds, all studs and nuts are still there. There are no noticeable holes that I could feel in the manifolds. Read some other posts here that have the "tick under load". Mine goes away once everything warms up. What to look at or for?
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2003 F150 5.4L Tow Package 140k miles... Had coils, all plugs/wires replaced two years ago due to vibe climbing hills. Now at startup in the morning for a minute or two during idle, the engine vibrates severely then subsides and runs fine rest of day. Doesn't do this every morning. Truck lives in FL. The issue is either temperature related or moisture related. Ford service has the truck presently and attempting to diagnose from an overnight stay. They already 'fixed' the problem last week by replacing #1 plug/wire and resetting the power control module (pcm) but two days later the problem came back. Tech said today that the plugs currently installed are Bosch (any issue with these plugs?)
2003 F150 5.4L 140k miles
2011 Expy 5.4L 44k miles
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I've got a 2003 f150 with the 5.4 and 128,000 miles with an engine tick. Its not an exhaust leak I know that for sure. It has came up in the last 20,000 miles. I've used motorcraft 5 20 w/ motorcraft filter. I've tried a kreen engine treatment with no change. Heres the description/syptoms:
-Slight clatter for 2-3 seconds upon cold startup (happens very rarely)
-top end ticking that is loudest and most noticable when warm (quieter when motors cold)
-not timing chains/tensioners etc because the noise is coming from the top end and most noticeable on the passenger side.
-at idle the tick is present-when you rev at idle, the noise goes away.
-Driving (or having the engine under any load for that matter) the noise gets louder.
-Anytime I accelerate, tow/haul, go up an incline the noise gets worse
-Sounds like a "whirring" sound from within the dash.
With all that said I am thinking the lash adjusters are getting noisy. I had a certified gm tech that has 40 yrs mechanic experience under his belt and builds prostreet muscle cars on the side look at it. He listened to it to it and that was his diagnosis as well as its not that bad so just live with it. The noise at idle doesn't bother me, its when im driving with the windows down. The noise drives me crazy and is a little annoying to me.
Heres a link to a video of the sound and keep in mind it is much louder now : Triton engine noise/tick - YouTube
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My truck over heated and I now have a looks like a pin hole leak next to the front injector on the left side looking at it. I have used sealers and it does not work. Water pools around the injector. Does this sound like a cracked intake housing? I have done many repairs but this is something I'm not sure I want to do. I can get a new intake setup for 160.00 on rock auto but ford would be in the 300 or more just for the part.
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I've got a 1997 F150 with the 4.2L V6. Before I got it last summer I did some research, but apparently missed the issue with the intake manifold gasket leaks on these early engines. It seems to be a very slow leak, but obviously I want to get it fixed. I called Ford to see if it had had the recall work done on it, but all they could tell me is that there wasn't an open recall on my truck (with the exception of the recent fuel tank strap recall). Their system apparently only goes back 10 years, so they couldn't even see the freakin' recall. So, I've got a few questions:
1) I know I didn't post much info, but does this seem like an intake manifold leak?
2) Are there any special tools needed to change out the gasket myself?
3) Can you all recommend any replacement gaskets? I found a few different manufacturers of gaskets, but I'm sure some are better than others.
4) Can this issue cause the computer to throw the loose gas cap code (P0455 if I recall correctly).
5) Would it be worth it to just get a new truck? I really wanted a diesel in the first place, but I also hate to give up on a nice truck with only 115,000 miles.
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First of my truck is an 03, xlt 4.6 5-speed with 82,000 miles. Almost always when i come to a stop i can hear a faint humming that is coming from the engine compartment. There is no pattern or set way that this humming happens, it just comes and goes when at idle. As soon as you put load on the motor it will go away. I got under the hood today and fired it up, nothing, gave it just a little throttle and sure enough here is this odd humming. It is coming from in the air intake. Also while i was under there i noticed that the cable that is right next to the throttle cable is very loose, i am not sure what this cable goes to or if this could be part of my problem
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My 97 f150 5.4 started missing on 5,6 it had antifreeze on top of the spark plugs but i cant figure out where its coming from my truck has been loosing coolant and it seems like the system is holding pressure because every time i take the cap off the radiator overfill i can hear it hissing then i see the antifreeze level plummet there's no visible leaks that i have seen when the truck is running an missing it steams out the exhaust but when its no missing it doesn't seem to be there's no milky oil or anything the thermostat doesn't seem to be leaking either the truck has over heated a couple times due to the antifreeze disappearing or the temp wont move at all then it shoots all the way to hot and cools down within seconds to normal i just put a new thermostat in. Also it sometimes misses on 4 and my exhaust smells like straight gas i put 4 gallons in it got 29 miles out of it .
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Replaced head gaskets on 2003 f-150 5.4. Now I can hear a ticking noise in middle of intake by #5 port. Maybe timing is off 1 link?
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I have a 1998 Ford f150 4.6 2x4 i have a coolant leak on the upper intake. It comes out on the back left of the intake through a metal pipe. Well where the metal pipe is (pressed in) to the intake. Now i talk to the guy at ford dealership in the parts he said it is called the (heater pipe). He also told me that the part is 21 dollars but I have to press it in and if that does stop the leak he said I would have to buy a new intake. Now here is the problem I can not find any info regarding this heater pipe. I don't know how to remove it properly, why it is leaking. I can't find it in the handbooks that i have read so far.
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I tried searching, but couldn't find anything. I have a '97 F-150 with the 5.4L and I have a plastic line coming off of my intake that I don't know where it is supposed to go. I don't know how or when it got disconnected, but I can't seem to find anything within reach of it that it can connect to.
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I have a 2000 f150 5.4 4x4 auto with a bad engine, and have 1997 f150 4.6 4x4 auto rolled but with a strong engine. What would need to be done to replace the 5.4 with the older 4.6 engine?
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I have a 98 f150 4.6 4x4 with 175.000 miles, I suspected the intake gasket is leaking, I'v never done this before. What is involved with this type of repair? Will the intake gasket leak bad enough to leak antifreeze on the floor? Is it okay to continue to drive with this problem? Bad weather is on the way.
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I have a 03 5.4 F150 SCrew... The intake was leaking on the passenger side (water outlet tube meets plastic).
Putting in the Dorman replacement and noticed that the front cylinder drivers side (#5) had a decent amount of coolant in it.. None of the others did. I've drained the coolant already and was wondering should I just put this back together and see?
The water outlet crossing has a hole right next to this cylinder and I can't see any cracks and not sure if the gaskets were leaking under it.
Seems like if the head gasket was blown I would see it in more cylinders? It never smoked or run bad before I got this leak... Drove it maybe 10 miles with it leaking out onto Cyl#1. Ran fine, never missed.
I just don't want to put this back together if the head gasket is blown but I don't know what to do.
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I am about to replace the intake manifold and gaskets. I know all of that process, but first question is if there is anything i should do whilst in there. Second question; what can I do with my intake to get more power? Mainly just kind of wondering before I get my parts ordered.
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so new motor new intake , rear passenger side decides to leak when roughly about 10 degrese or lower and being -13 yesterday and-18 this morning.
last year it did this n i put a nother hose clamp on that rear tube and just happened to stop . n now back but the ting is that its not wet at all at the hose but at top of head bottom intake hmm . this is all just during the initial start of truck stops even before truck really gets warm
if i tke it off n its messed up i hope its warrentied even though i painted it. if fine i guess add some gasket maker ?
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The Service Engine Soon light has come on on my 2000 F-150 with a 4.6L when I was driving home in the rain. It has about 120,000 miles on it now. What are some of the main reasons why this comes on? Oxygen Sensors?
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