Ford - F150 :: 1985 - Engine Missing While Driving
Jul 26, 2012
I've had my mechanic work on this issue (the engine misses), and for the past few months thought the issue was resolved.... Truck is 27 years old and has only 75K actual miles. Here's what I have done.
Installed rebuilt carburetor - 2009New plugs, wires, distributor cap and rotor - 2010Adjusted carburetor, timing, and choke - Feb 2012
I normally drive it every couple days, yet during last winter it set up for a couple weeks with 10% ethanol fuel. In early spring, the engine started missing while driving (about 1/3 of the time). After taking to the shop a couple times, my mechanic basically gave up. I believe it's time for a new mechanic. I may also give up and just get a newer truck, but not quite ready yet.
I suspected water in the tank, knowing that ethanol can attract moisture, so i ran the tank dry then bought 5 gallons ethanol free fuel (i live in the country where we can still find it). Engine started, ran great for a few months, and i thought i had solved the problem...until yesterday, when the engine started doing the same thing again just as it did when the problem originally started.
View 19 Replies
Advertisement
My 85 300 cid with a C6 trans won't shift out of first. Seems like this happened several years ago and it was a vacuum diaphragm or something like that. Is this user fixable or do I need a transmission shop to look at it?
View 2 Replies
85 ranger 2.3 fuel injected misses at high acceleration. Fairly new plugs and wires, just replaced the timing belt, pretty new fuel pump in tank, new fuel pressure regulator and pcv. It idles well, starts up and drives pretty well until you get it in 4th and really bog it down. Could be timing issues but I'm pretty sure I did everything right when I put the belt in. What it could be? I know when the tank fuel pump went out, it did something similar for a while...
View 9 Replies
My 85 f150 5L is parked to far in into my alley.. the last time i saw my keys i moved it up to water the plants that it was tucked almost on top of.
ive been looking for the keys for 2 months.. the truck isnt being driven at all but i think my neighbors are getting mad at it being out so far.
I can get in the engine bay, and i have jumped the starter on our big trucks at work before.. but what wires do i have to join to put the ignition into the run position?
View 9 Replies
Where is the cruise control amplifier located on an 85 F-150? The Chilton manual just says "behind the instrument panel". No pic or further description. Just looking up from the bottom of the dash I see a "black box" with 2 wires going into the top of it located just between the steering column and the wiper switch.
Is this it?
View 2 Replies
I was riding my 1985 Monte Carlo SS down I-20 and the engine abruptly shut-off. The radio and all of the lights were still operating. I pulled over to the service lane and waited an hour for a tow truck. While waiting, I was constantly checking to see if the car would start. After an hour, the car started again and I went on my way. I left the car parked for about 5 hours and when I went to start it, the car started right up. After making it about a mile down the road, the engine shut-off again in the turning lane of a busy intersection. I wouldn't start again after that.
I had the car towed 30 miles to my home and left it sitting. I just changed the alternator, spark plugs, spark plug wires and battery, the car still won't start. I used all high-end parts, no cheap stuff. The battery meter is reading low, even with the new battery.
The has an aftermarket UNGO alarm system in it, which is "spidered" into the ignition system. This prohibits power to everything except the lights if the key isn't in the ignition.
View 2 Replies
My pontiac is missing, from a complete stop, she hesitates a second before she goes.............and in the driving, I can feel a misfiring, not a noise, but it's not smooth, it's hesitating as I'm driving her too. We have replaced the fuel filter, air filter, had a tune up & trans serviced, it seemed to be better for a while, but now it's back.... She's an oldie, but a goodie, and we want to keep her...
View 14 Replies
I have the above vechicle with a straight six engine and with 100,000+ miles and have a problem that has been ongoing for sometime and am totally confused as to what to do. The pickup starts great in the morning and idles fine. No roughness during accelleration or anything while idling. I take my daughter to the bus stop and seems to be running fine. When I drop her off and drive for a short while the engine gives a bucking kind of sensation. This happens at the low end of the "Normal" range of the temperature gauge and apparent when driving around 40 - 45 mph. I think that it may slightly be running a bit rough at freeway speeds but I cannot for sure tell (Idaho roads are not the smoothest. ha). When the engine gets warmer it doesn't seem to be happening.
What could be causing this? I gave it a tune up before (OEM plugs, wires, rotor, cap) and it still happend. I made sure everything was even Motorcraft to see if that had anything to do with it! My nephew replaced the hoses at the top of the engine (I think they are return hoses) because they were bad but still having problems.
View 4 Replies
Yesterday driving to work felt the engine missing, on the way home got a CEL pulled the code when I got home it was P0302, so I started with the easy and put a new coil pack, same issue, so I prayed and pulled the plug (it didn't break). Put a new plug and a second new coil pack (just to be sure, and yes I keep extras dang 5.4). cleared codes and started it this time got P0202 Ford - Injector Circuit Malfunction Cylinder 2, so I checked Ohms on #2 and it was 12.6, #1, 3, 5,6 all have 13 Ohms, didn't check #4, 7, or 8 because my big hands and the probes on my multi meter. Checked the wires on all of them and have 12 volts with key on, not running. I read another check to put blk in pin and red on pos batt terminal, and that it was supposed to go 12 to 0 off and on with engine running, All of mine went up to 14 volts and stayed no switching. Is there something I am missing to check before replacing the injector on #2?
View 6 Replies
I am having trouble with drive ability. It is getting worse with no engine codes. Car idles fine, but misses. While driving and almost any speed. Drove with dealer today and he got a "misfire on 3?"
View 5 Replies
I have a 1985 ranger 2.3l efi and it bogs and dies while while driving, it can sit and idle all day long but when you go to drive it, it works great for 3-4 minutes then out of nowhere starts bogging sometimes I can keep it going a little longer but in the end the truck always dies . I know I'm loosing fuel pressure , I hooked a gauge up to it and drive it down the road when the truck died it showed 10 psi , from here I'm lost . It has a new fuel pump in the tank and I can hear the other one running when I click the key on , Also two new fuel filters .
View 3 Replies
The transmission feels like its slipping while in drive. Oddly though, it shifts great using 1st to 2nd to Drive, then using an on / off switch to control 3rd to Overdrive/4th. Its automatic and I am just using the shifter to control shifting, because the car doesn't seem to downshift on its own either. It will stay in Overdrive/4th even at 35mph with the pedal to the floor, only sometimes downshifting after awhile. The car also hesitates slightly while driving at above 65mph on highway. It stops doing so on hills, and it has no issues at lower speeds, even at 5k rpms. Not sure what that is related to. I just bought it, and the transmission fluid is black, not sure if its from lack of maintenance. I assume the transmission needs a rebuild, but the more I know the better I won't be ripped off at a shop.
View 2 Replies
vehicle shakes when driving between 58 and 62 mph. what could be wrong? seems to be from passenger side front.
View 2 Replies
I have a 92 ford f150 that ran great up until I was driving the other day and my trucks engine just shut off, like i turned the key off. It wouldn't restart. Towed it home, let it sit, and tried again..cranks fine, still wont start. replaced the coil.. Cranked it for about 5 min off and on and it barely started.. Let it run for about 5 min and shut it off, wouldn't restart. Replaced the icm....and again, cranked until it barely started, then it wouldn't restart. Today I replaced the ignition switch, and the cap n rotor. Now It'll crank for days..but still not starting. I have 40 lbs fuel pressure at the rail, plugs, wires ,all new. new fuel pumps also....
View 12 Replies
I recently bought a 1997 Ford Taurus. It ran fine when I got it but the third time I drove it, it started acting up. I was driving down the highway and I noticed it was missing a little bit. Then about 10 minutes later it started not being able to keep up speed. It just seemed to kinda bog down or something when I gave it more gas. The longer I drove the slower it would go until it eventually stopped. I took it to a mechanic and he said it was a cam sensor and cam synchronizer or something like that. When that didn't fix it he said it was the fuel pump and filter, which didn't work either. Took it to another and he said to try changing spark plugs and then coil pack after that didn't work. It runs fine when I first start the car but the more I push the accelerator the faster it starts bogging down.
View 15 Replies
I have a 2002 F150. Small V6 regular cab 8 foot bed 2 wheel drive.In the last couple of months it has developed a rhythmic shake that is more like driving over a bump. It is really quite similar to driving on a road where all the release joints have been recently tarred so you go over a slight bump every second or two. I actually tried to convince myself that is what it was for about a week. Seems to be coming from the front driver seat.I previously lived in Mexico and the pot holes there would occasionally shear the bolts right at the lug nuts. Not too different than a car that was damaged like that, but I checked the lug nuts and it seems ok.The bump does not transfer into the steering wheel.Being a 14 year old ford the motor doesn't idle as smooth as my wife's new Toyota, but not bad either. If I let off the gas the bump doesn't stop. I haven't changed into neutral while it is running to see if that stops it.Tie rod?Axle? What to check or if there is a picture of something I could post that might tell you what is wrong?Planned on a camping trip this weekend with my wife. She is going to be ticked if we have to cancel.
View 5 Replies
Once I had driven for about 15 minutes and the truck set for about 5 minutes. Then it would not start. Another time, I drove for about 20 minutes and it cut off while driving in a parking lot. I have had 2 different shops take a look at it and they cannot duplicate the problem. They have run a bunch of diagnostics and tried their selves but it always starts for them.
View 2 Replies
I'm a new owner of an '89 F150. It's a four speed manual trans, 4.9L 6cyl. This is my first truck and I bought a beater in hopes of learning while I fix it up. I have minimal experience (biggest repairs have been replacing disk brakes on a previous car and replacing the EGR valve on this truck), but I want to learn more.
The truck has a bypass switch and the forward fuel tank was removed. Both of these modifications occurred before I owed it. Also, the clutch is a bit grumpy. Sometimes I'm unable to get it into first (I usually "granny start" from second), and every once in a while it doesn't want to go into reverse.
When I bought the truck, it would just choke and cut off after driving for 30 minutes or so. It would restart after cooling down. My mechanic said it was a problem with the fuel pump and replaced it, and that fixed that problem.
After that, the truck began to have trouble starting. I would flip the bypass switch and the engine would rev up, then drop RPM's quickly until choking off within a couple seconds. When I flipped the switch again, it would start up fine. It would run fine after that.
A mechanic recommended having the fuel injectors cleaned. The fixed the problem for about a week, then it started again. A friend of a friend who has a home garage suggested a vacuum leak, and we found a leak in the EGR value, which we replaced.
Replacing the EGR valve fixed the problem again, for a couple days, but it came back. Meanwhile, immediately after the EGR valve was replaced, a new problem started. Periodically while I'm driving (I haven't been able to detect any pattern), the engine will just shudder or choke a bit. It feels like it's threatening to choke, but it never actually does. Once it starts, it typically does this every couple seconds until I shift gears.
I'd really like diagnosing what might be causing the choking when it starts and the new shudder when driving. I realize it could be a number of things.
View 6 Replies
I have a 99 f450 with a 7.3. Here lately it has been "missing" when driving or idling, but only every now and then. When driving down the road it will start bucking and boiling black smoke out then the ses light will come on and like turning a switch everything clears up and it acts and drives normal.
View 11 Replies
About 3 weeks ago my truck decided not to start after having driven many miles. It has happened again after a day of driving with multiple stops. It cranks but doesn't turn over. Mechanic could find no code errors, there is no service engine light. Problem?
View 9 Replies
99 F-150 V8 - During mountain driving after a long downhill I get a cloud of smoke when I get back on the gas. Appears to be darker smoke not oil like blue smoke. Only other issue I have with the truck is an occasional cloud of blue smoke when I start it which I believe is just aging valve seals. What is causing the cloud of smoke after a downhill?
View 9 Replies
