Engine is a high mileage (over 150,000) one. Truck is manual transmission. Above 2000 RPMS, low rumble noise and vibrations felt through gear shift lever. Only hear it when engine under load. I think its worn crank bearings... 1993/3.9 Dakota ....
View 2 RepliesCold start. engine starts but wont idle, just dies. rpms drop. Restart same. Must neutral drop to get going keep rpms up until engines shifts then things are fine until next cold start. Cleaned throttle, changed air filter, dry gas, injector cleaner, no warning signal, scans clean. 180k miles.
View 6 RepliesI have a 93 Nissan 240sx that exhibits weird electrical behavior. I've had the battery and alternator checked at two local Advance Auto Parts locations with results indicating no problems. The car starts and drives fine. Immediately after start, my automatic seatbelts are engaged and the RPMs drop to about 400 and the car shakes violently (while pressing brakes and even when not pressing brakes). RPMs drop anytime accessories are in use. When braking at a stop light, the RPMs drop and the car shakes again. Using my headlights causes the RPMs to drop but not a point where I feel shaking. The problem is worst at night when I am pulling up to my apartment complex with lights on, braking, and using my power windows to access my gate card reader. I don't know if this problem is related, but when I am listening to the radio and turn the volume all the way up, the radio keeps cuts on and off. I have a suspicion it's the grounds, but before I start tracing all my wires. I'd like to hear everyone's input. I determined it was the brake booster vacuum because it also happens when not using the brakes and pinching the line has no effect on idle.
View 10 RepliesI have a 03 Dakota 4x4 that is rumbling badly from the right front. The rumbling increases and gets louder steadily with speed, transfers slightly through the steering column, and goes away when turning right and taking the weight off the right front tire. It is also doing this when in 2WD. I have replaced the bearing hub assembly but that didnt fix it. I have also pulled out the CV axle, but am unable to tell if this is the problem. I'm also not finding any worn bushings or ball joints, or at least not enough wear to justify this horrid sound.
It is my understanding that a worn CV will produce a clicking noise when turning. I haven't noticed this at all, yet I can't imagine what other moving parts could be causing this rumbling. I have also taken a look at the spline on the differential, and other than the normal tiny bit of movement, it looks fine.
I have a 2000 f250 crew cab short bed 7.3 on a 6inch bds lift and 37 inch tires. When I accelerate pretty much any load above 1200 rpms I can feel a vibration, kinda feels like it may be coming from the front left but I'm not sure. I have heard that a wheel bearing going out can cause this, would this maybe be what's causing it?
I thought wheel bearing because it kind of sounds like there's a howl when decelerating, probably when accelerating as well but the trucks too loud and I can't hear it. or also have heard motor mount gone bad, I've also heard ujoints but the ujoints were done this summer. the front ujoint is bad but the front driveshaft shouldn't be turning when out of 4x4 and hubs unlocked.
Mechanics say they don’t know what wrong… I had some transmission work done on my truck – mostly an leak and replacing the harness – and ever since then after it rains or if we have a heavy dew my truck does the following:
Driving from O to 49 miles an hour truck is fine, as soon as I hit 50 the truck starts surging and you can see the tachometer jumping from 2000 RPM to 2500 RPMs. I drive around 17 miles to work where my truck will sit for seven hours. On the way home the truck is fine. I find this to be more of a problem when the truck has sat for a day or two over the weekend without driving it. Sometimes the “check engine” light will come on, sometimes not.
I have taken it to two different places and neither one says they can find anything wrong with the truck. I have driven this truck for over 11 years and know it very well. There is something wrong, but what? 1993 Chevy Silverado 3500 Diesel....
2000 Dakota, 4.7 V8 ... The 'CHECK GAUGES' light comes on intermittently. As soon as it comes on, the voltmeter gauge drops to zero (it is a brand new battery); the temperature gauge does flip flops; the truck dies right now. Walk home and come back later, and it starts up again. When you get home, you sure don't feel secure in taking it on the road again. The shop checked it and of course there was nothing wrong when they had it Where do I start the troubleshoot? Is it computer or?
View 1 RepliesMy 1993 Dodge Dakota quits running at any time, from right after start-up to going down the road. It wont start running again until the check engine light comes on when the ignition is turned on. I can sit there from a few seconds to five minutes before the check engine light comes on. I have cycled the key three times to check for a code, but there are none. I have checked much of the wiring to the relays and some to the PCM, but have found nothing wrong. This truck did the same thing with the two previous owners, and had the PCM replaced, to no avail.
View 6 RepliesI have a 1993 Dodge Dakota with a 5.2l MPFI and auto trans that has me and many other mechanics stumped. Recently it stalled on me when I pulled it into the driveway, and ever since it has had this problem.
When I start it up in the morning and it's cold, the problem isn't as bad, but as it warms up it gets worse. It sounds like it's running rough, but its firing on all cylinders. I've verifies this by pulling the plug wires and also the fuel injector wires, and each one will bog the engine down a bit. Also, when I'm cruising or parked, if I hold the throttle at 1000 rpm or less, it loads up and will stall when I let off the throttle. I have to bump the throttle to about 1500 rpm or so when pulling up to a light so that it won't stall on me. When I hold the throttle and it loads up, I can read the o2 sensor with a scanner and it shows 0.8 or 0.9v, so I know it's running rich. If I let off, the sensor reads normal. It's not super rich, but enough that it causes this problem.
Things I've tried so far:
- Replaced plugs, wires, cap, and rotor
- New coil (old one had cracks in the case)
- Checked distributor for play in the shaft, timing chain for looseness, and cam sensor for damage
- Has a new PCM, swapped back to old one and the problem still exists
- Checked fuel pressure with and without regulator, is within specs cold or warmed up, no odd drops in pressure
- Checked all sensors with scanner to verify they read within specs
- Replaced all sensors with known good used AND new and none made any difference (o2 sensor, MAP sensor, TPS, air intake temperature, idle air control, coolant temp sensor)Plugs are brown/tan colored, none are blatantly rich
- Replaced the battery, alternator, and checked all grounds
- Checked the EGR system for correct operation
- Checked for vacuum leaks and broken wires, found none
The truck also has no catalytic converter and only has 1 pre-cat o2 sensor. I also am not getting any codes.
I have a 2003 F250 SD with 130K miles. I primarily use it to pull a race car, about 5000 lbs is all. It has all the upgrades, from studs to EGR delete. Ford replaced the automatic transmission in 2005. I'm looking at a truck newer than 2011, but thinking either a flex fuel 250 or diesel. I want it loaded and 4WD, but they seem expensive.
Anyway, I have bad front wheel bearings. I know this because of the low rumble noise and how it acts when I rock the steering. How tough are they?? I build my entire race cars, so I have a well-equipped garage and some ability to cuss, but I don't have a lot of time. A buddy wants to do it for $300 total for both sides plus parts cost.
Also, this is the bad part I really need input on. It has a whining when at light throttle load and above 50-60 MPH. This seems to come from the floorboard area behind me. Gear changes do NOT affect the pitch, but a change in throttle crowding makes it louder and weaker. It has no coast down noise at all, and the noise pitch seems to track the drive shaft speed. It is a whine much like the low gear set in an automatic trans, but it does it in any gear with or without 4WD on. The only thing that affects the level is slightly pushing the accelerator, speed, or weight I am towing.
I've got a '93 Dakota that wouldn't start this morning after a cold snap, it used to fit just fine in any temp. It's cranking strong, can smell gas, and it's getting spark (used an inline tester). Battery had a full charge. Lay night the windchill got down to -40 Fahrenheit.
View 4 RepliesI have a 2000 Toyota Corolla LE that ran very well until about a month ago. It has about 146,000 miles on it. A month ago it started hesitating from a standstill and the engine ran extremely roughly when trying to move the car. But when I put it in low gear it did much better, although not great! When in Drive it barely moved the car at all and would frequently stop running completely.
When I took it to an auto parts store they hooked it up to their computer and it read out that I needed either spark pugs, spark plug wires, or a new coil. I have replaced the plugs, but that made little difference. I then took it to another auto repair place that told me that it was either a problems with valves, or a 'problems in the lower engine'. I don't know what that latter problems means but either way it sounds like it will be very expensive to fix.
2004 BMW 325i automatic - 127,000 well maintained miles - never abused - at 35-40 mph in high gear the rpms will periodically drop 200 and there is a noise like driving over small rumble strips after which the rpms instantly return - the speed does not vary. the dealer installed a warn drive shaft bearing but the problem continues - it is a bit less noticeable in sport mode - what can it be? computer - transmission - ????
The intention is to keep it for many years so if it is a transmission problem would rebuilding the current one or putting in a new one be the more advisable solution?
I have an engine noise on my 2000 Dodge Caravan with the 3.3 engine. It sounds a lot like the grinding of a rotating part. It occurs at start up, momentarily, then goes away. If I drop it in gear and start doing low speed maneuvering in the driveway, it comes back. If I turn on the AC it comes back. In all cases, the noise goes away at around 1200 rpm.
The noise occurs again, when I shut the engine down.The engine performs and runs smooth and normal otherwise. No stalling, stumbling, or bad gas mileage to report.
I can "feel" the noise with my hand, when I put my hand on the ac compressor bracket, or the intake manifold, or the valve cover. I've tried the listening through the stick method, and it seems to be coming from the front area of the engine. But I can't be sure. It is something internal. Let me describe:
I thought it was my AC compressor or clutch going bad. The fact that my AC had stopped working well, and was making jet engine noises at high rpm supported me decide this. I replaced the compressor. The AC works great now, and the jet engine noises went away. But the grinding noise is still there. As described.
I wishfully thought it was the belt tensioner or idler pulley. I replaced both of those. Noise still was there. I pulled off the serpentine belt, and started the engine. It made the noise, very briefly as it started, then went away completely. It made the noise again briefly as I shut the motor off. So it's still there without any of the accessories turning.
The noise is loud and obnoxious at idle when under load. It just can't be good. I've read theories about similar sounding problems, saying they could be loose timing chain, bad oil pump, slapping pistons, crank journals, flexplate/flywheels cracked.
I'm going to try doing an oil system flush, and then I'll change it out with a little thicker oil. See if that makes any difference in the noise. Currently I'm running 5w-30 Mobile 1. I think. I'll let you know if it changes anything. I'm also thinking I want to make a short video of the car idling and making the noise for my video camera. I'll post that on youtube and link it here.
I have a code scanner which indicated that I should change the MAP sensor. I did that, and just for fun changed the idle air control valve and throttle position sensor. Now the idle is extremely smooth in park or neutral, but once I'm in a moving gear it's up to the same shenanigans, antics and tomfoolery I described in my original post: 96 Dakota SLT idles rough & stalls. So I have a 96 Dodge Dakota SLT 3.9 4WD. Anyway, it idles relatively smoothly at about 700 RPM in drive or neutral, but if I'm in a moving gear and need to stop, the idle is extremely rough. Usually, the RPM's will drop to near 0 within about 20 seconds of coming to a stop. It will typically recover and continue with rough idling and near stalling a few times, but within a minute or two it stalls. A few additional details: it starts right up again after falling, it doesn't make any difference if I start it cold and drive immediately or drive it for an hour before coming to a stop, the same thing happens. Anything that looked suspicious to me has been changed (drivebelt, spark plugs & wires, distributor cap & rotor, pcv valve, idle air control valve, and, of course, the air freshener).
View 1 RepliesMy 2004 Dodge Dakota V6 4X4 hesitates/jumps/lags (don't know what to call it, but it feels like something momentarily holds back the truck from behind) when I am starting up a hill. I start to loose speed/RPMs and give it a little gas, the RPMs don't change, then it happens. As soon as the transmission does down shift though, and the RPMs go up, it stops. This issue happens the most between about 40 to 50 mph and 1000 and 2000 RPMs. If I turn overdrive off then this problem does not occur even when the RPMs dip down below 2000, which in all fairness is not often. The truck has appx. 128,000 miles on it. What this could be?
View 9 RepliesSo I have a 96 Dodge Dakota SLT 3.9 4WD. Anyway, it idles relatively smoothly at about 700 RPM in drive or neutral, but if I'm in a moving gear and need to stop, the idle is extremely rough. Usually, the RPM's will drop to near 0 within about 20 seconds of coming to a stop. It will typically recover and continue with rough idling and near stalling a few times, but within a minute or two it stalls. A few additional details: it starts right up again after falling, it doesn't make any difference if I start it cold and drive immediately or drive it for an hour before coming to a stop, the same thing happens. Anything that looked suspicious to me has been changed (drive belt, spark plugs & wires, distributor cap & rotor, pcv valve, idle air control valve, and, of course, the air freshener).
View 1 RepliesI have a 1993 Lexus SC 300 and have met all maint milestones. Recently had both rear shocks replaced and am getting a SHARP metal contact in the left rear when the suspension begins to load. Mechanic spent afternoon looking in shock mount, trunk, spare, jack, spare and antenna mast-can't find it. New tires. New rear brakes-told me that was it. Still there.
View 2 RepliesI have a 1994 dodge ram 2 wheel drive with a 318. Idles fine but when put under a load it starts surging and bucking at about 1500 rpms. Idles at 1500 no problem only under a load...
View 4 RepliesI recently purchased a 2003 jetta 1.8t 5 speed manual and it wasn't making this noise when I first bought it.. It's almost like a growling/grinding noise. It's sounds like it's coming from my middle console but it could be coming from the engine bay hard to tell, but the only time this noise happens is at 1900 rpms when the car is under load like if I'm going a hill it's pretty loud when I'm going slow, the previous owner had the water pump, timing belt, and clutch done 10k miles ago. I have a feeling it's from the clutch/transmission or maybe from the timing belt?
View 2 RepliesI have a 2006 Ford F150, king ranch, 4x4, super crew 135k miles. I bought the truck and shortly after noticed the miss under a load at 40-60 mph while in OD, or at higher RPMs at WOT, but never a CEL. Well 3 months went by and I couldn't take it anymore so with lots of research I decided to change the plugs. Ran seafoam through 2 tanks of fuel prior to this job to break up the carbon in hopes of none of the plugs breaking.
All 8 plugs came out with no issue and I replaced them with the Motocraft SP 515s (old ones were very nasty and brittle, most likely the original). I put copper anti seize on the end that goes through the channel in the head, however none got on the end near the electrode, and also on the threads. Put it all back together and it had the worse misfire an pretty much not drivable....flashing CEL and codes p0308, p0355, p0356. So I decided to buy 8 new coils as well, got all 8 of them on and now the truck is drivable but the miss is still there (no CEL).
Feels like maybe just one cylinder and I believe I got it pin pointed to cylinder 8. I put a vacuum gauge on it and unplugged the injectors 1 at a time and cylinder 8 is the only one that there is no change while unplugged. So I switched out the coil thinking maybe I got a bad one, still does it. My COP electrical plug has 12v Constant and also confirmed with an led it is getting signal. The injector is ticking or pulsing as i confirmed with a mechanic stethoscope. What am I missing????? Today when I get off I plan pulling the spark plug, checking for carbon tracking, check compression, check actual visual spark, and pull and clean the injector.