Acura - MDX :: 2001 - Suddenly Loose Power - RPM Stuck At 2000 - Stumbles At Acceleration?
Dec 6, 2012
I have a 2001 Acura MDX automatic transmission that at least once a day when driving around town, will suddenly loose power, RPM's seem to be stuck at 2000, and then surge up to 5000 with no forward motion. When I try to accelerate again, the car "stumbles" forward until the RPM's settle back down to between 1-3 and the car drives normal. This is creeping me out...any thoughts? Valves have been adjusted.
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I've got a misfire problem with my Focus. It started about a month ago and did not trip a code until last week. It stumbles on acceleration between 2,000 and 4,000 rpms. It is only a slight stumble and although noticeable, it does not impede driveability much. Last week I was able to get it to finally trip an OBD code. P302 - Cylinder 2 misfire. I changed the plugs and wires with no effect. I thought I had it narrowed down to the coil or injector until my wife noticed a new wrinkle.
Under normal driving conditions the misfire is annoying, but my wife found that if she turns on the A/C, it is undriveable and will not accelerate past 30 mph without some patience and a neck brace for the bucking. My first thought was the A/C compressor was freezing up. I turned off the A/C and left the blower on and it would not stop missing. I turn off the blower and it smooths right out to the annoyance I described first.
Right now I drive the car without A/C and blower whenever I accelerate. If I'm going a steady speed, all is well and I can run the blower and A/C.
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I have a 2000 Explorer 4.0 SOHC that I'm having a persistent problem of cylinder 3 misfire. I've changed plugs with Motorcraft plugs set to the proper gap, put on new wires and have checked the resistance across the ignition module, both primary and secondary without change. I doubt that the problem could be the ignition control module as only cylinder 3 is affected. I have Auto Enginuity that I use to read the codes, attempt a repair and then clear the codes only to have P0303 appear again. Obviously the engine stumbles and has poor acceleration.
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2000 Integra with 95k miles in an excellent condition - used pedal jack when parked
I had to make a left turn and ramp up so put it on D3 - I pressed the accelerator and when I felt the speed could be higher (I am not comfortable to drive up the hills) so I must have pressed hard on the accelerator. It then responded
Not sure what was happening, I started breaking and steering - still around 30mph, guessing - it was not a wild drive.
Still not satisfied, I moved to gear 2 and stopped the car. Realized the car is still pulling, turned off the engine and realized the accelerator pedal is stuck.
I pulled it and it has been fine! With the engine off, I pushed the pedal hard and it always bounced back. Not sure that the getting in and out the pedal jack had been interferring with the accel pedal. It also looks like the engineers did a good job that with the stuck accel pedal, I did not end up in a wild drive - I had to brake and move the tranny to 2 but was able stop it - it was a mild up the hill, but unsure if it played a big role.
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I have a 2001 Accent, manual transmission 1.5L. The lady who had it before me overfilled it and stuffed the charcoal canister. She had this replaced, but when I bought it she reported that it still had a fuel issue immediately after refueling. She said it would stall and run rough and hesitate.
After I bought it I took it to refuel and confirmed the problem. I had read that the ECU may be trying to draw fuel through following refueling, but the new canister might be messing something up. She used to only drive it commuting distance in a city, so I took it for a long drive. Running at steady cruising state for a prolonged period seemed like a good idea, to allow any ECU learning. This partially fixed the problem! Now, most of the time, I can leave a fuel stop without a 20km drama before the car settles down, although the problem hasn't entirely gone away and it still does play up sometimes.
There's a more pressing problem which may or may not be related, however. When launching from idle, the engine goes through this 2-5 second hesitation of no power at all. If I rev up before letting the clutch out it's ok, but there's a certain minimum revs needed to avoid the problem. This is killing my clutch, and if I get it wrong it sometimes leaves me in the middle of a busy junction with no power for an uncomfortable period! During the hesitation, I've found the best way to force it is to put clutch back in and go full throttle. After 1 second or so the revs come back. The problem is much worse when the air conditioning is on.
So the clues are:
1. the previous charcoal canister issue
2. the full throttle thing might indicate something with the TPS
3. the worsening of the problem with the a/c on
Things I've tried so far...
1. prolonged cruising; seemed to improve things after refueling but overall fueling issues not fixed.
2. disconnected the battery -ve and applied brake light circuit to drain ECU capacitor, then left for any power-hold relays etc. then reconnected battery and took it for a normal drive for 30 minutes or so. No effect.
...and things I've yet to try (all gleaned from searching this forum)
1. checking / replacing plugs and HT leads
2. checking / replacing o2 sensor
3. checking the TPS plug connections. Checking the sensor itself sounds expensive - would it involve more than standard OBD?
4. checking vac hoses, in particular the hose which draws from the cannister
5. checking alternator (not sure how); the worsening of the problem with the a/c on could indicate low power getting to injectors etc? (bit of a wild guess)
In a former life I was a diesel engine calibration engineer, so I know the tricks which manufacturers can put into ECUs. What I don't know is the tricks specific to this car.
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Basically I was driving along yesterday, no issues at all. about 3/4 of the way to my destination the car all of a sudden had a distant drop in power, a big vibration ran through the whole car at most RPM's and the engine/exhaust note is now best described as 'the Jetson's flying car'....although not that high pitched.
When I got to my destination, I pulled up to supercheap auto, checked the oil and there was a tiny bit at the bottom of the dipstick, so I topped it up to full but the issue still exists. After I popped the bonnet I also noticed a strong 'burning rubber' smell, but all the pulley's looked to be operational (could be wrong, didn't have a torch on me).
Got home, replaced the spark plugs as I thought a cylinder may have been missing, the first cylinder plug was black and oily, but the rest looked normal. So swapped them all out and the problem still exists, although not as severe.
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I have a 2000 Ford Focus with new battery and cables, new alternator, less than 100,000 (barely). Recently made a trip from austin to dallas and back. On the way back, on the interstate, car suddenly refused to continue acceleration (no indicator lights came on); pulled to the shoulder, shut everything off; waited about five minutes, car started up on first try..continued driving; about 12 miles later, same thing occurred. Pulled over, turned everything off, started up again just fine, drove the rest of the way home.
Took it to my mechanic, he ran diagnostics..found nothing. Ran perfectly on short drives around town for three weeks; three weeks later, another road trip...did not run air conditioner or anything extra on the drive; about 30 miles from final destination, same thing...lost speed, wouldn't accelerate, pulled over, shut it off...started right up again and ran fine to final destination. On the way home, about 100 miles into return trip, same thing.. lost acceleration etc. But this time would only keep running correctly for about 20 or so miles each time. Was happening so frequently, had it towed home. Got home, started right up, drove fine. the only thing my mechanic noted on last inspection was the AC would not turn off. Could this be an electrical or switch problem?
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Last night i noticed a slight hesitation during acceleration. Today i had driven around in town for awhile and did not notice any hesitation. When i got onto the interstate I pushed down the peddle to pass someone and it did nothing, I let off the gas and back on and the car bucked pretty bad. All the way home it has issues when I pressed on the gas but did fine at cruising speed. I would think a fuel filter would have been a slow progression issue so I am thinking maybe it is a sensor. I sprayed carb cleaner around vacuum hoses today and did not notice any surge so I think I eliminated a vacuum issue.
2004 Santa Fe 2.7 149k
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We have a 2001 E320 4-Matic. Recently, it has developed a serious problem. Every now and then, when I come to a stop (e.g., at a red light), the car would shake/vibrate significantly. Even more importantly, the car seems to lose acceleration suddenly and unpredictably (not necessarily correlated with vibration at the stop). The latter problem goes away "for the moment" by switching off the engine and then restarting it. The Check Engine light has come on as well. The codes that are diagnosed are P2001, P2003, P200F, P2082, P2050, P20151, P2055, and P2053.
While there are several issues with the car, I am most concerned now with the two issues I highlighted above - sudden loss of acceleration and the vibration while stopped (both happening unpredictably). I took the car to two mechanics. The two mechanics seem to sharply differ on how to resolve the "sudden and unpredictable loss of acceleration" issue. One mechanic (Mercedes dealer) attributes the problem to issues with EGR valve and claims replacing that will fix the problem. The other mechanic attributes the problem to the Catalytic Converter which he says is broken and is causing sudden loss of acceleration (and yes, there was a rattle some time ago). The second mechanic does not disagree that the EGR valve (and the secondary air injection system) has issues but he says it is the Catalytic Converter which is causing the core problem of sudden loss of acceleration (and yes, there was a rattle some time ago).
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My Venture LS is stumbling upon acceleration. It starts to occur around 35 mph and then continues with occasional smooth sailing. No rough idle and no stumble when coasting. I had the spark plugs and wires replaced at the dealer today and it did nothing. Fuel trim is fine, LT runs from 0 to - 5 . I replaced the MAF sensor a few months ago and all other sensors test OK on the scanner.
Also, I took my car to the dealership to have the plugs and wires replaced and they used the after market wires named Xact. I have never been to a dealer where they used aftermarket parts. I thought that they were required by GM to use their parts?
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The car takes off from a stop as it should. However, it shifts hard from 2nd to 3rd gear and that's when it stumbles and doesn't want to accelerate. It'll go if you press pedal at least halfway down. It runs great other than that. It only has 60k.
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I have a 2004 grand prix gt, within the last couple of days, it seems to loose power on acceleration and the motor completely dies at times. After waiting 10 seconds or so it will crank but may die again or just feel like it is loping. The problem is getting worse quickly. I have replaced the fuel filter. This did not stop the problem. I thinking it may be the fuel pump. If it is the fuel pump is there any way to verify this to be sure it is the problem before replacing it?
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1987 Acura Integra.... Had the timing belt, belts, etc done.
Screeching sound - I know it is the belts are loose - initially it wasn't there and then it started and it was getting a bit worse slowly. It seems to only happens when the engine is cold.
I went back and had the belts tightened.
Does this tell anything about the mechanic/workmanship?Should I be concerned about other areas of repair that does not have the symptom of screeching?
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I have a 1998 C1500 Silverado, with the 4.3 vortec engine, with 88k miles.
Upon initial acceleration the truck stumbles, sometimes even dies when taking off. I have had the codes read, and have gotten a P0102 and a P0404. I have swapped the MAF and EGR Valve out with a known good ones from the parts store; cleaned the throttle body; looked for vacuum lines that could be the problem but can't find anything.
I have even changed out the fuel filter since the engine sounds like it is starving.
Also, the transmission doesn't want to shift unless I let up on the acceleration pedal. I can get up to about 55 MPH and the RPMs sky rocket before it shifts, and the engine begins to ping before shifting.
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My accent (2001, 1.6L, with 179k miles) has service engine soon light on. Brought it to autozone and they said the upstream O2 sensor needs to be replaced. I borrowed the socket to take out the O2 sensor. It's very difficult even with the tool, because the O2 sensor was stuck with a lot of rust. I used an extension bar to get it out finally, but now when i tried to put the new sensor in, I found the hole's thread is very loose. Tried very hard but can't get the new sensor in securely. It seems I had to replace the whole exhaust manifold. The manifold is very expensive(because it has a build in catalyst converter). I'm wondering is there a way to make the O2 sensor in secure without replacing the whole thing? if I had to replace the manifold then I probably will just get rid of this car.
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After almost an entire year of trouble-free running (with the exception of replacing a ground strap), my 2009 accent decided to start bucking and shuddering again. It only does this when warmed up, runs perfect cold. In the last 16 months, I've replaced the plugs, coils, battery, PCV valve, and ground strap. Car starts with zero hesitation.
Strong battery and starter, consistent output from alternator. After @5 miles, the car stumbles on acceleration, and idles sporadically. While looking at it tonight, I noticed a few exhaust brackets under the car had broken, and the flex section of the intermediate pipe had torn open. Could this presumed exhaust leak be causing the crap running performance?
My "exhausted" brain thought it could cause the O2 sensor to misinform the ECM, resulting in the P0300 code I pulled...
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My problem is on wed I was driving my car,when I suddenly lost acceleration power, after pulling over to the side of the road I turned off the car and restarted it. However I still had the same problem with acceleration. After a while of trying to get the car to start I called a tow truck and got it towed to the dealer. When I got there they told me it was likely and issue with with a sensor on the gas pedal and the engine. At the dealership I started the car to show them the problem however the car drove perfectly and no engine light came on.
They told me it was most like what they said over the phone the sensors. However on xmas eve they called me and left a voicemail saying the rear cat had went out and taken out both rear exhaust manifolds and it would coast $3000 to fix. My question is how can all that happen without the checking engine light coming on in the car and the car showing no problems while i was driving it and how did they miss it when I had took the car in two weeks earlier for regular maintenance and to correct a drive belt issue due to it walking after I purchased a new drive belt and pulley.
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My Acura has been having some problems with what I"m guessing is a computer glitch. It's been to the mechanic four times in the past two weeks and while my dealer has been great about cooperating and trying to fix the problem, I think they just don't know what the problem is. The problems started when one day I was driving the car and all of a sudden all the error message lights came on and the car could no longer accelerate. Drove it slowly back home but when i took it to the mechanic the next day, it was working fine so he couldn't do anything about it.
Took it home and within ten minutes the problem started again. This time i took it to an Acura dealer and they kept the car for two days until it started acting up again (engine warning lights and what not) and they did an engine valve replacement of the traction control or some such thing. Two days later I was driving and the car just shut off and wouldn't turn back on. I was moving and not stopped or anything at the time. Took the car back again and they decided to change the whole computer system. Now two days later again, the check emission and check transmission warnings came on again.
The car is still working for the time being but its only a matter of time before it conks out on me. Also, even while running, the lights that indicitate what gear it is in continuously flash (so the D is flashing instead of solid) and occasionally the D and D3 lights are flashing simultaneously even though I am obviously in drive.
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I have a 04 FX4 scab with a 5.4L and am having issues with it idling rough, and low power and stumbling upon acceleration and cruising speed. I did a scan and the codes show lean run condition, misfire on cyl 4, etc. I changed injector and coil on #4 and it seems worse. Scared to change the plugs, until I can leave the truck down a day or two in the event that I break one or more.
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I've got 120,000 on my 08 manual Accent. Recently I've been getting white smoke after running it hard. It happens like this. I slow down from 70mph or so with the clutch engaged to about 40mph, then upon acceleration the engine stumbles and white smoke pours from the tailpipe. My guess is a leaky head gasket.
I had the dealer go through it. They pressure tested the cylinders and put a scope in them. They claim nothing is wrong with the engine.
I mentioned since they can vouch for the engine now, I'd like to get an estimate on trade in value. I don't think I want to keep it much longer.
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My 02 F150 4.6 has 84K miles on it, and started stumbling/hesitating during accellartion about three weeks ago. Before this problem started (about 2,000 miles ago), I installed a new fuel filter and air filter. Since I noticed the problem, I installed new plugs. The problem didn't go away, so today I checked the fuel pressure. At idle the pressure is 32psi with the vacuum line left on the fuel pressure regulator (30-45 is normal as per Chilton's), and 42 with the vacuum line off (40-50 is normal as per Chilton's). I also had someone else rev the engine so I could observe, and found that the fuel pressure went as low as 28 when the engine speed was quickly increased. The standing fuel line pressure is 30 (30 is normal as per Chilton's) Does this sound like a fuel pump problem, or is there something else that I'm missing.
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