It's a 2003 Mountaineer with a mechanical throttle not drive by wire. For about two weeks while idling in park or in gear but stopped in the drive-thru, the engine revs upwards of 1200-2100 rpm. Runs fine normally, no check engine light, no misfire and doesn't matter if the A/C is on or not.
View 5 RepliesToyota Corolla 93, manual transmission so there was a problem with idling, while it idles, the engine revs up but im not pressing the gas pedal at all. found out it the vacuum hose was broken. we fix it, buy a new one and now the engine dies out. change the air filter. The car still dies out. so the car either dies out or bad idling. what do i do?
View 5 RepliesI have 03 f250 v10. just replaced the engine and got everything all connected and started it up and it idles great...the problem is that when you press the gas pedal it starts to drive but then it looses power and acts like its missing. cant get it to go 30 mph. While keeping it floored eventually it gets up to 2000 rpm and then starts to pick up speed.
View 14 RepliesMy 2003 Elantra has multi spark (quad) electrodes? I have a hesitation on acceleration problem. Also feel resistance when pressing the gas pedal. I am going to change the plugs and wires. Just wondering if the type of plugs may contribute to the problem.
View 9 RepliesOk, did an intake manifold cleaning on my 99 Accord the other day, and now I have problems...
Long story short, some time ago my car started to have a very rough idle. Took me awhile to find the problem. Turned out the air hose, between the filter and throttle body, had developed a big hole on the underside. So I replaced it and while I was at it used some throttle body cleaner, spraying into the intake manifold chamber. Lot of junk blew out the tailpipe. The car ran much better, but the idle could still be a little rough. I ran it that way for awhile, and finally the other day decided there was probably still some junk in there and it was time to really clean it out. So I took ff the throttle body and intake manifold housing. There was a lot of junk in there! The small intake on the passenger side was completely clogged shut. (I understand this isn't surprising on these cars.) I used a bunch of rags and 2 cans of Valvoline throttle body cleaner and a lot of elbow grease and cleaned it out. I was thinking to myself that whatever I didn't get with the rags flushed through OK, but I didn't want to take the whole intake manifold out.
So I put it all back together. (I took a video before I started, so I'm pretty sure it's all back together right.) But now I have problems. The car starts. It idles fine mostly, but can be a bit rough. But the trouble starts when I put the pedal down. If I do it in Park, well, if I push it quick the engine just dies. If I push it slow, the engine revs then quits, revs and quits, over and over. Similar if it's in gear. If I push it hard, the engine stalls. If I push it gentle, it revs up, but chugs along a bit.
I've run some seafoam through it, thinking it was clogged up with all that junk, and sure enough, lots of smoke comes out, but nothing is improving so far. What have I done wrong?
I have an occasional issue when pressing the gas pedal while stopped or at low speed the car hesitates and slightly kicks. It doesn't seem to happen at high speeds. The auto mechanic I took it to said he is getting a read that it might be the thermostat. My temperature gauge has not moved above normal. The auto guy says they need to start with the thermostat and see where we are with the problem at hand afterward. This does not make sense to me. Maybe the electronic read is right and the thermostat needs replacing, but how can this affect my occasional hesitation problem?
View 12 RepliesWe have a 2004 Honda Accord V6 with 178,000 miles and the car is giving us some issues. We can drive the car for 10-15 minutes with no issues. Then when we push on the gas pedal, the car will not go any farther and the engine just revs. If we turn the car off and restart it, the car will continue to drive. There are no check engine lights on the car. Could these be a transmission issue?
View 5 RepliesI just picked up my new 2014 Chevrolet Camaro with the V6 and 6 speed manual transmission. If I just punch the gas pedal when in neutral, the engine almost dies for just a second but then rev's up normally. It seems like a burst of gas chocks out the engine. I have tried the same thing in other Camaro's and the engine rev's up normally as soon as you punch the gas pedal.
View 13 RepliesI have a 2001 toyota prius. When I start the car and press on the gas pedal the engine rev's but nothing moves and there is some clatter from the engine. I can put it in B mode and drive it a short distance, but that's it.... The engine light has been coming off and on for a week now. It makes a loud audible tone and then I turn it off and back on and then it stops.
View 5 RepliesWas just out and about today with my girlfriend and while driving back home, the engine just randomly cutout. I pulled over to the side of the road and popped the hood just to see if something came undone. Everything is kosher. Started it back up and carried on, but while driving the rpms kept dropping low and when stopped it would drop to about 450-500rpm.
So I put it in neutral and kept my foot on the gas to keep the engine up to about 1000-1500 RPM just so it wouldn't cutout. Drove part of the way home with overdrive off, even though speed limits in some areas won't let me even get into over drive. No check engine light, no messages on the message center, nothing. Looked into it and it seems to be one of several things.
Mass Air Flow sensor
Fuel Filter
Fuel Pump
Throttle Position Sensor
Yesterday I did fill up with gas, so maybe I got a there after they filled up the tanks. 2003 Merc. Mountaineer 4.6L.
While driving, I noticed that when I floor the gas pedal to go faster, the engine revs up and takes about a second or 2 until the car accelerates. i also noticed that if i let go of the gas pedal while the engine revs then the car doesn't go any faster, it just revs then goes back to normal. Whats going on?
View 3 RepliesJust recently when pressing gas pedal heavily, my truck makes a squealing noise. What that is?
View 5 Replies2001 F150 5.4 v8 ... In the past few months my truck has been a bit strange, but in the past few weeks it's gotten to the point I'm nervous to drive it. Usually when shifting around 30-35, the engine revs up and stops accelerating and I have to take my foot off the pedal to make it return to normal. It doesn't do this after I do that, but the past time I tried to drive I couldn't get above 35 and the rpm was in the upper 2000s going at a constant 35. When I stop for any reason such as making a turn, when it shifts it lurches forward and I hear a loud clunk.
Naturally, I've checked all the fluids and fuses and they're all fine. The mechanic I regularly visit insists that nothing is wrong with it.
PCV hose/grommet was rotted out with 1 inch hole but supposedly he spent a long time tracking down the problem. It was located way in the back middle (like underneath the wiper blades area).
2002 F150 XLT Crew Cab 4.6L 4x4 170K
What known issues would do this but not turn engine light on? Motor sounds excellent and runs excellent. Previously it was missing and engine code come up as random misfire, misfire cylinder #2 and #4. I replaced the coil packs on 2 and 4 and erased the code and there was a 1000% difference. Ran excellent (still does).
However, a week later I noticed a subtle shake in the motor, and at idle it would stay at 1...maybe slowly chirp just above 1, and then sputter a little down to 1/2 rpm. It will do this and stay running, but sometimes it will cut off.
What are the possible things that you think it could be considering no check engine codes? (Bad motor?)
The car starts if I press the gas pedal slightly. It falters a little and idles a little rough, fuel can be smelled in the exhaust after the startup (not afterwards). Once the car starts it drives just fine. The guy who sold me the car informed me that he ran the car to empty tank two days ago and had to fetch 2 gallons in a can to start it again, that is when the problem started.
View 11 Replies2001 F150 5.4 4x4 148K... I recently replaced the intake manifold on this truck and when the engine revs it wants to continue at high RPMs for about 10 seconds after letting off the throttle. When driving, it almost wants to go faster and the gas mileage is really bad. Had some codes come up and took it to AZO and had them checked. P0171 & P0174. Guess I need to do some testing on the MAF and injectors.
View 2 RepliesGetting a clunk feel and sound while pressing the brake pedal? If I press harder, another clunk or two occurs. Felt and hear especially at low speed or stopped. No issues braking, but the clunk has slowly gotten worse since I dropped the car on RSR Downs which could be a coincidence.
View 7 RepliesWhen I start the car in the morning & step on the gas there is a fluttering noise which happens each time I accelerate until it warms up. I bought the car with 17,000 miles on it and I didn't notice it happening then, but it was warm weather then.
View 2 RepliesMy Hyundai Avante (2011 model 1.6) suddenly loses acceleration while my foot is still pressing on the gas pedal. Every time that happens I have to raise my foot from the gas pedal and press it again to make the car accelerate. This thing happens randomly, but mostly at speed lower than 80 Km/h
I tested the car on an empty road once; I didn't raise my foot from the gas pedal this time when the car lost acceleration. The car speed dropped to zero and the RPM gauge returned to idle (i.e. around 1000 RPM).
The check engine never light up during or even after this thing occurs. Here is the list of things the mechanic tried on my car:
1-Cleaned the body throttle
2- Tested the car with another used body throttle
2- Tested the car with another used gas pedal
3-Check the fuel pressure and injection
4- Checked the sparks
5- Tested the car onboard computer.
None of the above worked!!! Here is the strange thing my mechanic discovered, if he unplugs the cable of the Anti-lock braking system in the car. The problem never occurs.
I have been driving the car for two weeks, with the ABS system unplugged. The loss of acceleration problem never happens. I am not sure what the ABS has got to do with the car acceleration.
A family member said that the front ball bearings are bad. This is what is going on; when I am driving and release the gas pedal and/or brake pedal, it jerks. When I am turning, left or right, to park in a parking space, it sounds and feels like the tire is going to break (when turning right to park, right tire; turning in left, left tire). I don't want to get taken advantage of when I go to a mechanic.
View 14 RepliesMy 2013 RX350 (all-wheel) has a super annoying droning sound when pressing gas pedal - it is not the smooth-humming but a kind of low cat-purring sound that is more pronounced when in low RPMs. The dealership can't tell the problem, Lexus Field Specialist acknowledged the sound and said I am not the first one to complain about it, but he doesn't think anything wrong with it. According to him, this is not the sound of the engine, but the exhaustion system. My overall experience with RX350 is not as good as I had expected: it is nosier than my previous highlander, it is also nosier than my wife's Odyssey.
View 14 Replies