Ford F-150 - 1997-2003 :: 1998 - Rough Running Truck When Accelerating
Sep 19, 2013
I have a 1998 F150 4.6 2wd regular cab with 255,000 miles on it. Lately it has had some problems. The first is that it will run really rough when under a load, meaning when I step on the gas. It runs smooth at idle and at cruise but when I step on the accelerator it bogs way down and almost shuts off. I have changed the spark plugs, spark plug wires, coil packs and fuel filter. Now I'm thinking maybe fuel pump?
The other issue is that when the truck is having to work a little harder (i.e. pulling a trailer or running in the summer with the AC on) it will start to run hot. I have changed the thermostat, flushed the coolant, cleaned out the radiator, etc. and it still does it. Could both of my issues be related to a fuel problem??
View 9 Replies
Advertisement
I have a 2001 F150 4.6L auto. This truck suddenly started running rough. Cleared all codes and re-scanned after starting truck. The codes are as follows; P0135, P0155, P0443, P0740, P0743, P0758, P1451, P1460, P1747, and P1760.
My question is; is it normal to have this many DTCs come up at once? Could my PCM be faulty causing this problem? Can you swap a pcm from the same year truck with the same options without reprogramming?
View 2 Replies
2001 F150 4.6. Just replaced all 4 oxygen sensors and spark plugs. Replaced rubber grommet on brake booster as it was leaking vacuum.
Truck is still running rough hesitating.
Pulled codes came up as PO141 oxygen sensor heater circuit. PO171 passenger side cylinders running lean. Fuel trim outside limits.
View 9 Replies
I have been having some issues with my 97 ford f150 4.6 liter, started out running rough, then hydrolocked with no serious damage, blown intake manifold gasket, fixed that, alternator over charging do to bad voltage regulator, fixed that. and airbag code 52, still working on that, as well as failure to connect when trying to do diagnostic scan. now I am wondering if the engine diagnostic is still even working. still running good just a very slight vibration when warms up. I am not getting any code. or my check engine light is not showing any codes. What I want to do is force a code. What would be the safest way to force a code or force engine light to give a code?
View 6 Replies
What can cause shutter in 1998 f-150 4.6 4x4 4r70w when slowly accelerating?
View 5 Replies
I have a 98 f-150 4.6L 5spd that has a weird rattling noise coming from what sounds like the engine. The noise will only happen when the truck is in gear and under a load. It will not happen if I keep the RPM's low, unless I am going up a hill. When I rev the truck in neutral, the rattling noise isn't there. Also when I'm driving and hear the ratling noise it will go away when i push the clutch in(which im guessing takes the load off) but will come back when i let out on the clutch. Seems to happen most when I'm in gear and trying to accelerate.
View 9 Replies
Its not the tires/wheels. I just had them balanced. It only shakes when hard accelerating. If I am easy on it, then smooth as can be. It gets worse with the RPM of the engine. I am thinking its in the tranny.
It still shifts smooth and I have been pulling 17 mpg on the interstate with it. So I know its acting correctly? Could I have blown something in the trans or ballooned the torque converter?
It just started the other day, I drove about 350 miles on vacation and noticed it when I went to come home. Like i said it only shakes when you lay in to the throttle, and it gets kinda violent.
View 14 Replies
I have a 1997 Ford F-150 XLT 4.6L 4x4 Auto and it's having an issue. My truck has recently developed a stutter when accelerating. It feels like a serious misfire and actually pulled a code for a misfire on cylinder 7 (although I haven't been able to get the code to appear again). The plugs are pretty new, I think I only have around 10k miles on them so i figured it might be the coil pack. I bought 2 new coil packs but only one was in stock so i replaced it on the drivers side bank (which controls cylinder 7) and it didn't fix my problem. When I first start the truck and drive it, it isn't very noticeable, but as I drive the truck for a few minutes, the stutter gets more violent. I will replace the other coil pack tomorrow, but I have my doubts it's the problem. It acts just like a bad coil pack.
View 9 Replies
ran fine the day before, fuelled up that night, next morning it did this. cleaned the IAC, tried a different TPS, cleaned mass air flow sensor. check vacuum lines. put couple bottles of gas line anti freeze in.
[URL]
View 9 Replies
I had an HPOP line burst and soak the engine compartment with oil. I replaced the line and degreased the engine and rinsed it off. I started the truck and let it idle for 15 minutes or so before driving it. On the way home right after a shift it started chugging and running terribly. The check engine light was on as well. I limped it the mile or so home and shut it off. I restarted it and it runs just fine. I checked the DTC's with Forscan and there were a bunch of things that were mostly related to the HPOP and the MAT sensor that was shredded when the line blew. I left the hood open to dry out today and I'm hoping it is just some water in a connector. Does that sound plausible?
View 6 Replies
If I even fart in my truck, there is a jingling underneath. I know my ball bearings need to be replaced. But, what the noise is. It sound like loose change in my pocket. I can't describe it any better.
View 12 Replies
Got a buddy with a 98 white f150 with the 5.4 motor. It will start up and idle fine but if you try to drive it it has no power what so ever. What it could be?
View 2 Replies
2003 ford explorer 4.6L. This truck will start and run rough high temp low oil light come on and temp gauge is pegged hot. Oil gauge is fine though, checked oil its fine.
I checked coolant reservoir its ok.
If I shut truck off and restart it will run ok and rev like normal and then all of a sudden go into limp mode and will misfire etc...
What sensor seems to be the main culprit?cht sensor???
View 1 Replies
I have a 98 F150. The motor was replaced three months ago and have had no problems until now. The truck had trouble starting so i put an alternator on it. Fixed for a while and then it started blowing fuel relay fuses. I replaced fuel pump and filter. Truck has trouble starting after sitting overnight. When I am driving and floor it, once it hits about 4,000 rpms, the truck bucks like its the transmission but the rpms drop and then pick back up. Fuel pressure is right where its supposed to be.
View 1 Replies
I noticed a vacuum line hanging under my 98 F 150 4x4 I traced it out to my front axle question is where does the other end go I have looked but no luck to where it goes.
View 5 Replies
My aunt recently gave me her 02 f150 for free because it got flooded and she didnt want to fool with it. she said it ran great before it got flooded. I flushed everything. oil, gas, and tranny. I blew water out the cylinders and replaced the spark plugs. I took the fuel injectors out and cleaned and cycled some b12 threw them. The truck starts and gets spark to every cylinder and is only running on 3. I can pull 3 plug wires off and the idle does not change. Idk what it could be but dead cylinders. I am afraid I am going to have to find a new engine. I am going to do a compression check later this week when I have time. I am new to fords so if there is anything I should check...
View 2 Replies
I have been having odd problems with my truck for several weeks now and what the problem may be. Occasionally the truck will not start. This happens after it has been run for an errand or to church. The truck turns over but no ignition. Sometimes if I pump the gas pedal very quickly I can get it to start. Other times I have to sit and wait about 5 minutes. I have gotten the following two error codes - P1506=Cylinder Head Temp Sensor and P1299=Idle Air Control Overspeed Error. For two days the "check engine" light was on, but now it has gone out. I have searched for an answer to this problem on these boards and one possibility may be a vacuum leak. Is this the most likely? 1998 Triton 4.6 ....
View 3 Replies
I have a 1998 Ford F150 with 4.2.. Started off a intermittent problem of not starting acct no fuel. Now will not start at all. Checked all fuses and relays.. Am not getting voltage at fuel pump. Changed ECM thinking that was the problem.. Have checked all multi wire connectors for corrosion and tightness. Am at a lost what to try next.
Also, not sure if its related or not. The turn signals and hazard flashers do not work. When I turn on the hazard flashers, nothing happens. If I leave the flashers switch on, the turn signal work. Checked all fuses and relays and they appear good.
View 2 Replies
My 1997 f150 4.2L 2 wheel drive truck has been running rough only in the morning. In the last year I have changed the plugs, wires etc. As soon as I start the truck and attempt to drive, it is very hesitant, runs rough etc., but if I only give it a little gas and not push it - the truck will run fine. This will only last about 45 seconds and then it runs normal for the rest of the day. I do not have original FORD sparkplugs and someone told me that might be why. I spoke to a mechanic (did not work for Ford) and he told me it wouldn't make a difference.
View 10 Replies
I have a 1998 Ford F150 4.6L Triton V8 with the FX4 package. As of recent I have noticed my truck tends to idle roughly every so often that I start it up and after longer trips but will run fine once I get going. I take care of my truck like its my baby. I've done everything to it that I can without getting into the engine such as replacing spark plugs, wires, KN air filter, new ignition coil packs, change oil every 5000 with best products, etc the basic tune up stuff every one should do. This truck only has 118,xxx miles on it as it sat in a barn for around 4 or 5 years due to the previous owner being in the military.
I have been trying to search for the cause of this problem but cannot exactly seem to pinpoint it myself. One unusual thing I've noticed also is that when I run the air either hot or cold when my RPM's get high, when I go up hills or punch it, the air switches from vent to dashboard(defrost). I talked to someone who said this was most likely a vacuum leak. Maybe there is a correlation between the two? I'm not exactly sure. I read online my idling problems may be from a cracked PCV elbow? I cleaned out the EGR valve also about two months ago to see if that work. I am willing to try anything myself as long as it doesn't involve tearing the motor apart!
View 6 Replies
Sometimes the truck is hard to get started and to keep running, Once it warms up it will run fine. The next time it is started it will start fine but when you are going down the road if I try to accelerate it will start backfiring and not pick up any speed. I am getting a lean code on both banks. I have changed the IAC, the throttle position sensor and mass air flow sensor. 2002 F150 with 6 cyl
View 1 Replies
