Ford - F150 :: 1987 - Dead Spot In The Throttle And Dies When Let Off Gas At A Stop Light Or Sign
Aug 7, 2011
I have a 1987 ford f150 with a EFI throttle bodied 5.0L (302), and I have taken it to a mechanic multiple times because for one it has a dead spot in the throttle and it dies when you let off the gas at a stop light or sign. But the mechanic said he checked everything he knew to check and found nothing wrong with it. I also had my cousin read the computer previous to this and we couldn't pull the codes from it.
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Golf VI 2.5 automatic... I seemed to notice a dead spot in the throttle when taking off from a light. You press the gas, nothing seems to happen. To start from a stop sign, you have to really give the car some juice to get going, which ends up being too much throttle and sucks gas. In other words, very difficult to take off at a moderate pace from a stop. Seems like all or nothing.
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I'm trying to diagnose the problem with my friend's 1994 crown Vic police interceptor. It dies at stop signs and then won't start back up till after waiting like 5-10 minutes. I asked him if his check engine light is on. He said yes, so I looked up how to retrieve the codes with a jumper wire as I have on older vehicles of my own. I found that information but can't locate the terminal. He said other symptoms are poor fuel economy and sluggish performance. My friend is so busy and pinched for cash he's been driving like this for over a year.
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I have a 99 7.3 F250. It dies when I slow down for a turn or for a stop sign. At highway speed, it 'surges' sometimes, and makes he whole truck jump. Also, there is a small leak in the tube connected to the turbo. Has 250k miles ......
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I have a 2000 S10 Chevy blazer .One day I was at a stop sign when the truck went completely dead , I had no power . I walked home , I came back a little later and figure I would give it a try well it started so I brought it home .. from then on it would start up some days and other times it would just crank but not start .After keeping it my garage for over a year , the other day I charged the battery and try to start the truck , it kicked right over and I let it run for awhile . I turned it off and restarted it again let it run for awhile . Yesterday I went up to start it again and nothing ,so I gave up , today it was the same thing it would just crank but not start . I know its not a fuel issue , and I don't think its an ignition problem ..
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I've read the throttle lag posts with interest. Ours only lags when performing a "California" stop where you go from the brake to the gas and look for an instant pick up. Seem to have about a second of delay before anything happens. Of course this causes all sorts of unnecessary lurching and I don't like it. Does everyone else experience this as part of their throttle lag problem?
2004 V8 Touareg
2003 GTi 1.8t
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I got a 2002 sierra 1500 with a 5.3l. I just replaced both catalytic converters and y pipe. After I did this, I am having a few problems. First, when slow down to park or at a stop sign the idle drops way down and it dies. I cleaned the throttle body, maf sensor, and ran a can of seafoam and a can of b12 chemtool through it. It did this for a couple of days and now when the idle slows down the "check oil pressure" light comes on before it dies. Then yesterday the "check oil level" light started coming on. Is this all related, would the low idle cause low oil pressure, where to start?
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I have a 04 lariat f150. Problem is every time I stop at a light or stop sign I hear and feel a bump. Coming from the rear I guess . Had my truck aligned asked the alignment person about the situation he said ford just do that. True or false ...
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I have a 2009 F150 4x4, XLT crew 6.5' bed, 5.4 engine. The truck has a very strange erratic throttle behavior from a dead stop through low speeds, shifting seems very strange at low speeds too.
Dealer tried re-flashing the computer, but that didn't fix it. They talk about some valve that sounds to me like it's similar to an EGR function, but I cant remember what he called this valve. He explained the issue as exhaust gasses that are to be recirculated and burned, but the valve is opening at the wrong time, or stuck open or something so it feeds the fire so to speak.
Does any of this sound typical or common? Is this something that's hopefully easier to do than a spark plug change on a 5.4?
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So among the other annoyances my 92 Ranger 4.0 auto has it has a hesitation before it starts spinning the tires under full throttle from a dead stop. It's the 4.0 automatic. I thought it would have more power than it actually does being use to a 2.5 auto. But this 92 4.0 runs and drives good. I've gotten it tuned up with new motorcraft wires, plugs, new coil, fuel filter, fuel pump assembly, fuel pressure regulator, air filter, idle air valve, new O2 sensor, new Dynomax muffler. I can't find any vacuum leaks. The engine idles slightly rough after you start it up from it sitting for a few hours, but quickly smooths out as soon as you start driving it.
This one here has no EGR. Transmission feels good, may have even been replaced by previous owner before we got it. It shifts good and the fluid is clean and the transmission is the cleanest part under the whole truck. No way of knowing for sure. The truck currently has 111,000 miles and I did all that stuff when we got it at 101,000 miles. So what could it be? I'm thinking a lazy injector or could it be the catalytic converter? Or could it be the throttle body? I know I once had a BBK throttle body on it and it made the world of difference in off the line power but it kept throwing too rich/lean condition and a TPS code so I had to return it. It sucks because it did wake up the motor. I returned it and since then the Check Engine Light hasn't come back on.
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I don't drive (aren't you lucky?) but my wife and I own a '95 Ford Windstar and last summer we had issues with coolant leaking and had to have a few head gaskets replaced. Now, when we're idling at a stop light or sign, the oil light goes on but as soon as we accelerate, it goes off. The manual says the light indicated either low fluids (which isn't the case) or that the pressure within the system is low. The vehicle seems to run fine otherwise but I'm wondering if the oil light gauge has been set too sensitive?
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Having throttle hesitation problems. This is the 3rd time I have had it in for this problem and they can't figure out what is wrong. The vehicle moves slightly forward from a stop and then goes dead for a few seconds then seems to recover and go.
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It's an oldie, 1984, but so far still kicking. 6 cyl 2.8, carb. I took a little couple hundred mile trip a few weeks ago. Rolled back into town no problems.
A few days later I took a ride and the ranger would stall when approaching a stop sign or light. I would hold the pedal down a little to keep it running but it sounded like it wanted to die if I didn't feather the pedal to rev a bit.
I drove a few days later, as I was going down the neighborhood road(25 mph), it acted like it wanted to just die. I mashed the pedal and it had no effect. It didn't stall and eventually I could rev the engine to continue.
It continues to do the same, then will all of a sudden take off like there was never a problem. If/when it does stall again, it can be hard to start until it does start and off I go again like there was never a problem. Other times, it will idle.
Another note: Sometimes when I go to start the engine it will stutter, intermittently turnover. It has done the same thing while actually driving, kind of a jerking deal.
Fuel filter, fuel pump, electrical? I'm going to first check/replace the fuel filter tomorrow.
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So of course the dealership isn't going to diagnose this since "the car's not supposed to be driven that way" - but I get a nasty rumbling noise when I accelerate from a dead stop with wide open throttle. It only lasts for the first few thousand RPMs in first gear, and after that it is gone.
I was guessing that it might be the transfer case or something like that, but it's really hard to tell. I do have AWD. I did not have any such problem in my previous GS, which was a 2007 (current is a 2010). It's worse when I accelerate around a corner, and it also makes a small noise when I'm going above 80ish mph, which of course the dealership isn't going to diagnose either.
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Trying to troubleshoot a very intermittent (has happened on two different occasions during the last 1,000 miles) hesitation from a stop-light. I've been recording engine parameters (Torque application) on both instances as these have been during longer trips after a period of highway driving. 2004 Excursion, 112K miles.
This feels kind of like severe turbo hesitation (4 to 10 seconds trying to start out before it kicks in) but I don't think that's it. The turbo is a new PowerMax turbo replaced 5 months ago. VGT readings seem pretty normal. The EGR valve is new -- the first instance was with the old and the second was with the new. I've also recently replaced the EGR and Oil coolers (before this).
Here's what's interesting in the captured data though... Normally when I coast into a stop-light the indicated engine load stabilizes at about 40-50% and VGT moves to about 65% to 70% at idle. The two different times this happened (actually multiple times at stop-signs/light close to each other over 5 minutes or so for both of these), when I have coasted to the stop, the engine load increases from low values during coast-down (0% during freeway coast-down or 19-30% during other coast) up to 99.6% (or other similar high values) at idle and VGT seems to be full closed at 85%.
There is absolutely no response to the throttle in this situation for 5-10 seconds. I've either been goosing the throttle a bit or putting it neutral and revving it up first to get things going again. When it finally catches and starts accelerating with power, indicated engine load drops to 50-60% again and VGT opens up to 40-60% or so. None of the other parameters I've been capturing seem to read strangely during this that I recognize. No issues observed during cruise and power seems good. No pending DTCs or engine light.
Here's what the data points I'm capturing (once each second):
Boost
Calibration Input Volts
ECT
EOT
Fan RPM
FICM main volts
Fuel Injector pulse width
ICP
ICP Volts
IPR Duty cycle
RPM
Engine Load
MAP
Trans Temp
VGT Duty Cycle
EBP
EGR Commanded
EGR Error
Added today but not captured during these issues yet:
IAT
IAT2
Baro
Accel Pedal Position
Mass Airflow Rate
Mass Fuel Desired
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I have noticed, in my 2012 Elantra with 32,000 miles on it, that my car is shaking at idle. I'll be at a red light or stop sign and the vibration is SUPER annoying. I have had it tested at a Hyundai Dealership. They couldn't "replicate the problem" and nothing it wrong with my car.
I may be trading this car in for the Veloster Turbo. I'm tired of how slow this car is. I know I sacrificed speed for gas mileage, but I have a question, does the Veloster have this problem as well?
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Will I wear out the transmission using the engine brake to slow down faster when coming to a stop at a stop sign or light, then shifting back into D when taking off? Should I just always leave it in D unless I am driving down a steep hill?
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I have a 2007 automatic jeep compass that is stalling. heres the thing, it only stalls when i am idle at a red light/stop sign. I also noticed it only stalls when its in drive. if i switch the car to neutral while stopped/idle it will not stall. i also notice this happens more frequently in the rain.
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3 mechanics can't find what is wrong but when I come to a stop sign or light my car stalls, not every time but a lot. Also, seems to happen more in cold or wet weather. So every time I stop and idle I have to quick put it into park.
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When @ a light or stop sign the car vibrates excessively to the point it makes my daughter sick. I do feel it vibrating but it doesn't bother me but something is definitely wrong. There are no engine lights on, I can hear the top end tapping and clattering, I did check the valve clearances which seem to be barely within specs. She says it vibrates worse when the tank is full. She also said when the tank is full the front end shakes driving down the road. I'm kinda wondering the front end shaking with a full tank might be the rear struts.
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My Mazda tribute 2003 (manual) has developed a habit of 'pretending' to be overheated. If I do more than 2 or 3 stops as I run Saturday errands on a warm day - the care refuses to start and' continue' to run. I can start the car but have to rev the engine and restart at every stop sign and red light- If I pop the hood and wait about 40 minutes the car seems to 'cool' down and will run. The engine does not redline - water and coolant are fine - Is this just a faulty thermostat or is it some insidious vapor lock....
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