Ford - Explorer :: 1991 - Front End Vibration Very Fast As Long As There Are Bumps
Aug 2, 2011
At highway speeds above 60 mph on a smooth road, the vehicle runs fine. But if the road has any bumps at all, even small ones, it starts to vibrate very fast as long as there are bumps. The steering wheel almost becomes a blur. It's like it's going into oscillation.
The wheels have been balanced and rotated. The movement the steering wheel is not side to side, like I have experienced with imbalanced wheels.
The shocks look fine and I am told that they are OK by the tire dealer . I have never had this kind of a problem with bad shocks. The vibration is just too rapid.
Before I take the truck in for the mechanic to inspect it, I would like to know what the problem might be.
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I have a 2005 Explorer XLT Sport 4x4 w/ 118k miles. I am having front end noise when I go over speed bumps, driveway aprons, etc.
I already replaced the Struts/Coils, and ball joints, the sway bar end links are newer. The noise is almost like a noise an old spring mattress would make.
What could the issue be?
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Grandson 1991 Ranger 3.0 v6 69,000 miles We have a long start issue after it has sat for 30 mins. plus. If you open the throttle part way while cranking it will start fairly easily. Fuel pressure comes up instantly when you turn on the key. It runs at 39 psi pull the vac line off regulator it jumps to 49 psi. Fuel pressure does drop to about 30 psi after setting an hour. It kinda acts like it is flooded when it starts. so far we have done a complete tune up plugs wires cap and rotor. The ignition module has been replaced twice last one a real Motorcraft. New fuel pump and filter. Cleaned the fuel injectors with Ford cleaning system. I will replace the coil next and maybe clean the iac.
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1991 Ford Explorer XLT, 4X4, 4.0L push-rod motor, 315,000K
Problem Part 1: Excessive fuel consumption
Codes for O2 sensor, system lean, some black smoke, unburnt fuel smell, some slight hesitation when accelerating from a stop
I replaced the 02 sensor, replaced the IAC, cleaned the MAF, replaced the coil pack, replaced the plugs, replaced the plug wires, replaced fuel filter, replaced air cleaner, replaced the PVC valve changed brand of fuel, checked tires and "brake binding" - NOTHING. Truck ran "fine" other than excessive fuel consumption. I decided to replace the fuel pressure regulator and before I could get to the parts store we have...
Problem Part 2:
Truck begins to lope along like there is one bad cylinder. It sometimes "fixes" then comes back (all this over a period of 3 days).
Day 4 it's dead - no start.
The motor cranks, the fuel pump "pumps" 3-5 secs KOEO fuel line is clear, return line is clear, filter is clear. There is fuel at the Schrader valve (do not know pressures) and the electrical system seems OK (sparks to all 6cyl). I believe the crank position indicator is OK because the CEL is on KOEO but goes out when cranking. I have no codes because I needed to remove the battery to re-charge. Fuel pump fuse is OK.
Only other information that may (or may not) be relevant is that lately it is slow to heat up. It does not come off "cold" (for the last 4 days). Maybe it's the thermostat or temperature sending unit? Maybe it's because its -30C here. It heats up fine if I block the airflow across the radiator (the old carboard solution).
I have not checked the relay. Where this unit is on the 1991? Don't say fuel pump.
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2005 explorer just started having a fast blink on the right turn signal. Left turn and hazards work fine.
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Have a 91 Exp 4.0 v6, has a no start problem only in the cold weather. Last year, replaced coil pack, fuel pump, crank censor, this winter...same problem. Just will not start when it is cold. No codes, no ck engine. Checked it today...it has no spark. What could cause this? Fuel filter has also been changed. told him to ck crank position censor connector.
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My 1991 Explorer 4.0 4x4 overdrive not working, so far have checked ohms on sensor at trans and it appears to be ok. Also looking for the pinout of PCM under passenger kick panel to see if voltage is being output to the sensor at trans.
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'99 Explorer 5.0 doesn't want to start in the cold weather, below 30. After it finally starts it runs great and will start all day. It cranks fast but it doesn't get driven every day.
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My 2000 Explorer overheated and I had water pump and intake manifold replaced.. then it had a freeze plug rust out and its replaced, I'm holding water.. but now it just wont start.. we've tried everything from changing fuel injectors, fuel delivery unit on intake, now the fuel pump is changed.. still wont start and the theft light is flashing fast.. my dad changed computers while I was out of town,, is it the theft device or does the computer need coded for this explorer?? we have taken negative off battery but nothing.. And if I change the motor will that work or still not run because of theft light or computer??
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Happened two times already if i press gas when turning 90 degrees. My engine stops and i have to start car again, why could this be happening?
I got misfire cylinder 4 and 6 perhaps its related however i am trying to understand dynamics of things why engine only stops under this conditions?
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Anyway I have a friend with a Mazda Navaho. 1991, 5spd transmission
It jerks intermittently, and sometimes quite severely. Myself, and 4 other ASE mechanics, and 1 "old ford guru" are stumped. We know we have ruled out the clutch for sure....
We think It started when my friend put a clutch in it. He did not have the flywheel turned . When we looked at it, we were all convinced this was the issue....drive test and dumping the clutch in and out at cruising speeds could replicate the issue. However, he had just bought the truck, and it needed a clutch, however the jerking we think was happening before, but we didn't know as we couldn't drive it till we put the clutch in it.
So we re-did the clutch...had flywheel machined, and got a warranty replacement clutch just in case, and put it back together.
Same issues. so we checked, and tested.
1. Fuel pressure test- passed, no issues
2. Checked fuel regulator for leaks - none
3. Checked for and found no vacuum leaks-none
4. Swept, and actually replaced (3 times) the TPS -is working fine
5. Replaced the MAF - Thought we had it, as we disconnected the MAF and jerking seemed to go away instantly...however few days later jerking returned, and driving with MAF unplugged still jerking.
6. Replaced Ignition Module, checked coils, plugs etc...actually replaced plugs and wires as well
7. Disconnected Transfor case plug to make sure it wasn't the issue as well.
I really don't know what else to check. The motor runs fine, the trans shifts smoothly...the clutch is new and was done correctly. I run a small auto shop, and we have access to Mitchells, All-Data, and Identifix....all were no dice. It seems you try and research jerking and hesitation all the hits come up for Auto trans and Torque converter lockout issues. This truck is a 5 spd .....
I have owned many Aerostars back in the day (loved em, same 4.0) and I have never seen this
The jerking is random and intermittent...symptoms would be similar to a small child flicking a light switch on and off rapidly when it does it. power, no power, power, no power, and rapidly...it feels like someone herky jerking on the clutch but we have ruled that out....its definitely electrical.
Also, and naturally, even though it is Obd I we have checked and there are no pending nor stored codes....PCM thinks everything is hunky dory. No backfiring, no smoke, no misfires....runs like new except this perplexing issue.
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I just got a '91 Explorer. It has no brake lights at all. I've checked all the fuses and everything's fine there.
What's the next thing to look at? I can't say I've seen this problem before.
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I just bought it off my friend yesterday and I noticed the back door doesn't lock, the glass part doesn't either. How I could fix it?
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My voltmeter (91 Explorer) bounces with loads, i.e. when sitting at a stop light with the brake lights and turn signal on.
Revving the engine up doesn't seem to work. What does this indicate? Bad battery? Bad alternator or voltage regulator?
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I have a '91 Camry that's my daily 50 mile round trip commute car. It runs well and still has lots of pep at 156,000. There are oil and tranny leaks (tranny leaks around the pan seal) but I check the levels and keep everything topped off. Tranny fluid and filter were changed about 20K miles ago. I am the original owner. Shifting is OK unless I accelerate hard, then it "bumps" into gear. On hard acceleration it is a pretty good bump but if I back off the gas it shifts much better. There are no other symptoms, at lower speeds it shifts fine unless the A/C is on, then I get bumps above the 1-2 shift. What the problem is?
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I've got a 1991 Ford F150 Super Cab, 351 Windsor 5.8L V8, 2WD with 177000 miles on it. It rocks, I love this truck. But above 60 miles an hour I start to get a horrible vibration throughout the cab, mostly under the seat. It gets worse the faster I go to the point the whole cab vibrates. The challenge is that it only occurs when I'm on flat interstate, with just enough gas to maintain speed. If I accelerate, it goes away (or subsides quite a bit). If I let off the gas, it goes away completely. I had a transmission diagnosis from a local, reputable shop, and they said the tranny was fine. They said it was something in the engine, but I'm baffled that something in the engine could cause such a vibration all over the cab. Any thoughts on what this might be?
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So my 2002 ford explorer with the 4.0 L V6, has been cranking along time before it starts. I thought i had this figured out already, i put a brand new fuel pump in it from the ford dealer. That seemed to work, but the problem came back.
Especially when it is cold, it cranks a lot longer than normal to start. and when it does start RMPS go way up briefly and come back down. Seems to only act up when its cold out, say 35 degrees and lower.
So the remote start wont work because it only cranks for a few seconds and then stops. it tries this three times and it gives up. i go out there to start it and cranks for 10 seconds it seems like, sometimes i have to feather the fuel pedal.
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I'm fixing up my 1991 Ford Explorer Sport. I've replaced door panels, handles, center console, seat upholstery etc... I'm now looking for a replacement headliner. I've already checked LMC without any luck. Also my windows will not roll up/down even though the electric window motors are working. I can push and pull the windows up and down by hand while pushing the corresponding direction on the door control so it seems the mechanism is just slipping against the window. What exactly is this mechanism? what do I need to fix this problem?
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How to reset the Anti Theft on my explorer? The light is flashing fast and the engine won't start. Without the anti theft being reset the truck won't start. Been checking around to find an answer but can't find one...
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I have a 2003 Ford Explorer with around 93,000 miles on it. I got the oil changed just before going on a long trip. It had been about 4,000 miles since the last oil change. My trip was about 3.5 hours in each direction with mostly highway driving where I was cruising at around 65-70 MPH but some long steep hills mixed in as well. On the way to my destination after cresting over one of these long steep hills, and going about 60 MPH while heading up the hill, white smoke started billowing out of the exhaust every time I hit the gas pedal.
I pulled over and white smoke was creeping off the muffler as well. I'm not very mechanically inclined, but opened up the hood anyways, and no smoke or anything in there. I let the car sit for about 5 minutes until the smoke stopped creeping off the muffler then drove the rest of the 30 minutes or so to my destination with no more problems.
On the return trip, the same thing happened (different hill) with about the same timeline. I was about 30 minutes out from home, had just crested over a long steep hill going around 60 MPH and the white smoke started coming out again every time I hit the gas. Pulled over again, waited for the smoke to dissipate and for no more to be coming off the muffler and finished my drive home with no problems.
I've only owned the car for about 6 months. I haven't encountered anything like this up to this point. And in the month or so driving it since the trip and incident, I have not seen any white smoke . There are no warning lights on, the temperature gauge looks completely normal. From what I have read online it seems like coolant would be causing this white smoke, but I can't figure out why it only happened on these two occasions. What is going on or what I should do?
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The other day, my father-in-law was driving my '91 Explorer and it just died on him. I assumed that the fuel pump quit becuase it wouldn't come on when the switch was turned on. I had a brand new lying around so I dropped the tank and put it in but it still won't work. I checked the inertia switch and it wasn't tripped. There is no power coming to the new pump at all. When the switch is turned on, there is a noticeable "click" inside the engine bay. Would that be the fuel pump relay making that "click"?
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