Venture :: Chevy LS Stumbles Upon Acceleration At Around 35 Mph
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?
Monte Carlo :: 1997 / 3.1 Stumbles Upon Acceleration
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.
View 4 RepliesAccent RB (2012+) :: Noticeable Power Loss After Some Initial Acceleration
Bought my first Hyundai, a 2013 Accent last Saturday. Love almost everything about the vehicle.
It is equipped with the EcoBoost which I can turn on and off.
Noticing when I accelerate almost every time there is some initial acceleration and then a noticeable power loss. It's much worse when I'm accelerating through a turn.
Honestly it's hard to tell too much of a difference with the EcoBoost and AC off.
Also noticing the car really surges at times with the cruise control on. Obviously if I hit an incline it's going to boost a bit, but sometimes even on very minor inclines or straightaways the RPMS just fluctuate more than they seem to need to.
Wondering if this is normal for this engine and something I need to get used to. Coming from a Honda Civic I didn't experience this consistent power loss / fluctuation.
Prius (2010-12) :: Hesitate Upon Initial Acceleration - Low Traction Battery
I have had my 2010 Prius 2010 for a year now. I have been taking my Prius to a full service car wash with the conveyor belt. They have always seemed ver Prius savvy. But the last couple of times, after getting in the car and driving away, the car seemed to hesitate upon initial acceleration. Then the problem goes away.
The last time I took it to this car wash, I sat in the car, because I only needed the express exterior wash. About a third of the way through, the instrument panel said "Low Traction Battery... put into Park" I did not obey the warning because I was afraid of putting it in Park while the conveyor belt system was pushing my Prius along. So I ignored it. By the end of the car wash, the engine had shut down. I had to start it up and drive out, and I got that same momentary, initial hesitation as I accelerated, like before. The hesitation went away after that.
Ford :: 1998 - Engine Stumbles In Warmer Weather
I am 2nd owner of 98 Ford Explorer Eddie Bauer V6SOHC. Vehicle is almost showroom condition w/ 70,000 miles and properly maintained.
Problem: engine seems to stumble quite frequently and is most noticeable when ambient temp is above 60*. Highway speeds , 40MPH doesn't matter. RPMS drop but it has completely shut down only twice in the last 9 months.
There are no codes. Plugs and wires changed several months ago, fuel pressure checked by Ford and it's ok, injectors cleaned at dealer, MAF seems ok so I am at a loss. Since there are no codes diagnostics don't work. Except for the issue above, this is a very nice reliable vehicle.
Camry 2012+ :: Slight Humming Noise During Initial Acceleration At About 8-10mph
This noise sound as if an electric motor going off for a second only. It almost sounds as a CD changer changing cds but for a second only.
What is weird is that it only sounds when the car has been off, turn it on and I start accelerating to about 8-10mph. If I come to a complete stop at a stop light and accelerate again it will not sound. If i come to complete stop and put the car in park or N, it will not sound. You will only hear it on the first take off when the car has been off.
I would also like to point that I have manually shifted and this does not change a thing. The noise still comes on around 8-10mph even if I keep it in 1st gear.
Furthermore, I would also like to point out that the noise is is not loud. Chances are I will not hear if I have radio on at low levels or the A/C fan in mid to high.
Again, the sounds seems to come from the outside the cab and it sounds like an electric motor going off for about one second only.
The car is a 2012 l4 with about 60k miles on the odo.
Prius (2004-09) :: Metal Clunk At Initial Acceleration And Hard Braking
I just had my front axels replaced. The Cv's were clicking. That problem was fixed.
Metal clunk at initial acceleration and hard braking (none during steering)...
Ford F-150 (2004-2008) :: Rumble / Shudder In Truck On Initial Acceleration
Just rejoined this Ford gang after years absence. Used to own "The Muny Pit", a '79 F-150 4WD monster with a '69 429... constantly breaking something. Anyway, where to look on my '08 F-150 XLT 4WD with a 5.4, 83,000 miles. Searched the search bar for my title and found a post on an '00 Expedition describing similar issue than mine... for about 6 months now when I accelerate either from stop or a crawl; forward or reverse; more so when turning, but does do it wheels straight.
Upon initial acceleration I have this horrendous rumble / shudder in the truck, like the grinding metal bearing sound/feeling felt when the pinion bearing went out on my '79 (only felt it seconds before the 9" rear pumpkin exploded). Once rolling it stops. I have checked all wheel bearings.. I have check all the suspension joints... everything looks fine, no obvious issues. The only suspension mod I've done is a 1.5" leveling kit when brand new. On the Expedition two replys suggested changing the transmission/transfer case fluids claiming it cured their vehicles.
Ford F-150 (2009-2014) :: Increase Initial Acceleration From A Dead Stop?
I was just curious what the best way to increase initial acceleration from a dead stop is for a 2009 F- 150 XLT with a 5.4 V-8.
View 14 RepliesFord Fuel System :: 1998 - Extreme High Initial Idle At Start Up
I have an issue with extreme high initial idle at start up. I took my 1998 Ranger with a 3.0L to the local dealer to have some work done about a month ago. Long story short, my number six plug wire got burned against the exhaust rail.
Anyway, I guess they re-flashed the computer to the newest *.bin, or flash version. After that when I start the truck the tachometer jumps up to 2200 - 2300 RPM and then it settles down to about 1500 after a moment or two, then it finally adjusts itself to about 1100 for a few more seconds and eventually ends up at 900 - 1000 RPM.
I confronted Ford about this and they said that Ranger's and F-150's do have a tendency to do that at start up. Ordinarily I wouldn't be too concerned, however I believe that the 2200 - 2300 RPM high idle at start up at 0 F, a bit much.
Accent MC (2006-11) :: Misfire / Car Stumbles On Acceleration And Idles Sporadically
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...
Cavalier :: 1998 - Stalls / Stumbles And Cab Fills With Gas Odor In Moist Conditions
So I have a '98 cavalier with the 2.2l and 4sp auto. Anyway, it runs great when dry conditions, but when its wet from rain or any moisture it runs terrible. It stalls and stumbles and the cab fills with a gas odor. I changed the coil packs and plugs and wires and it still does it. I have a P0301 cylinder 1 misfire detected and a P0200 injector circuit problem. I'm having a hard time believing this because it runs fine most of the time. Is there something else I can look at that is feeding this problem? Is this a common ocurrance?
View 4 RepliesFord F-150 (2004-2008) :: Rough Idle / Stumbles Upon Acceleration On Highway
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.
View 10 RepliesElantra XD (2001-06) :: Grinding Sound On Initial Acceleration From Park / Scrapping Noise During Braking
2001 Hyundai Elantra, with an automatic transmission.
1. I am experiencing a "grinding" sound upon my initial acceleration from park? This only occurs when the car has been sitting for a decent amount of time and the engine is relatively cold. To give you more detail: I start the car, throw it in gear and begin to accelerate. The grinding sounds is almost instant and sounds horrible. It is fairly consistent how long it lasts and generally once the car shifts to 2nd or 3rd it goes away. I do not hear it again until I park, leave the car for a while, then start it up and begin driving again.
2. I am hearing a "tension" like noise, also a little like scraping, when I brake at slow speeds coming from my driver side front wheel. I recently had my brakes replaced so I know its probably not the pads and at the time the rotors looked fine too. It is not a constant noise during the breaking either meaning, I apply the breaks, i hear it for a second, then it goes again, then it comes back, then goes away. Again it sounds like a mix between scrapping metal and tension.
What it could be, what I could look at on my own or how to get it resolved?
Golf IV R32 :: Sluggish On Initial Acceleration And Very Slight Backfire - Camshaft Hall Sensor Loose
I had been driving around for a few days and the car had been feeling a bit sluggish on initial acceleration and there was also a very slight backfire.
Just seemed to have lost some crispness. No fault codes thrown with VAGCOM.
Found one of the Camshaft Hall Sensors loose. I have had this before with the exhaust cam sensor but this time it was the inlet one. The bolt just comes a bit loose and the sensor can swivel around very slightly if you move it with your hand.
It seems to be enough to upset the the performance but not enough to throw any codes - after all it is still working perfectly sending a signal as far as VAGCOM is concerned.
Just need to nip it up again with an M5 Allen key and you are golden. One with a ball end makes it easier to get to. Just regained about 20 HP
Pic for information ....
Accent MC (2006-11) :: Engine Stumbles And White Smoke Pours From Tailpipe Upon Acceleration
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.
Acura - MDX :: 2001 - Suddenly Loose Power - RPM Stuck At 2000 - Stumbles At Acceleration?
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.
View 10 RepliesFord F-150 - 1997-2003 :: 2002 - Stumbles - Hesitates During Acceleration - Fuel Pump?
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.
View 10 RepliesFord - Focus :: 2002 Cylinder 2 Misfire / Stumbles On Acceleration Between 2000 And 4000 RPMs
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.