Hesitation ??
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Hesitation ??
I have a strange problem. When I am stoped for a short period and holding
my foot on the brake then go right to the gas (like at a red light) I get a short
hesitation ?? Well kind of, When I first press the gas pedal it is like the truck
dies the comes right back. Like I was hitting a kill switch at the same time as
the gas. It is just a split second, the truck has never stalled, just a flicker
and off we go. If I stop at the light and then take my foot off the brake and
idle for a few seconds and let it roll a few feet it doesnt do it.
New plugs, cap, rotor, oil and air changed no difference.
Any Ideas.
daajr
my foot on the brake then go right to the gas (like at a red light) I get a short
hesitation ?? Well kind of, When I first press the gas pedal it is like the truck
dies the comes right back. Like I was hitting a kill switch at the same time as
the gas. It is just a split second, the truck has never stalled, just a flicker
and off we go. If I stop at the light and then take my foot off the brake and
idle for a few seconds and let it roll a few feet it doesnt do it.
New plugs, cap, rotor, oil and air changed no difference.
Any Ideas.
daajr
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Junior User
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Sorry, when I previewed this thread before posting the truck vitals
were in my signature, don't know why they didnt show up.
93, f150, I6, supercab, 2 wheel drive.
What is a IACV, where is it, is it something I can test/replace?
daajr
were in my signature, don't know why they didnt show up.
93, f150, I6, supercab, 2 wheel drive.
What is a IACV, where is it, is it something I can test/replace?
daajr
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From: B/CS, Texas!!
IAC is mounted on the right side of the Throttle Body. It has an electrical connector on it. One way I know of testing it is to unplug the electrical plug when your truck is warmed up. Once you unplug it, the engine will bog down and nearly stall. If you unplug it and nothing happened, it might be very, very dirty, or just needs replacement.
Thanks for compliment on me truck
Thanks for compliment on me truck
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From: B/CS, Texas!!
Sure we can know what they stand for, but what do they do 
?
Idle Air Control = It controls incoming air when the throttle blades are shut. If you look in your upper throttle bore, you'll see a small hole. The hole leads to the valve which opens (actually flutters) and lets air in when the truck is idling or when u let off the gas. When its dirty, or malfunctioning, no air can get through, thus the truck will stall when its idling, or when u brake. There's 2 parts to it, the electrical half, and a mechanical part. You can take it off and remove the elctrical part and clean the mechanical part.
Throttle Position sensor = Almost self-explanatory The more u push the gas pedal, the higher the voltage the TPS sends to the PCM (computer). A bad TPS usually gets "stuck" on a certain voltage. Most of the time, its a very high voltage and your truck will idle very high. Other bad TPS's will have 'dead' spots. If this happens, you'll notice that at a certain point, when you press the gas pedal, nothing happens. A way to test the TPS is with a Digital Voltmeter. You can manually rotate the throttle and watch voltages.
?Idle Air Control = It controls incoming air when the throttle blades are shut. If you look in your upper throttle bore, you'll see a small hole. The hole leads to the valve which opens (actually flutters) and lets air in when the truck is idling or when u let off the gas. When its dirty, or malfunctioning, no air can get through, thus the truck will stall when its idling, or when u brake. There's 2 parts to it, the electrical half, and a mechanical part. You can take it off and remove the elctrical part and clean the mechanical part.
Throttle Position sensor = Almost self-explanatory
The more u push the gas pedal, the higher the voltage the TPS sends to the PCM (computer). A bad TPS usually gets "stuck" on a certain voltage. Most of the time, its a very high voltage and your truck will idle very high. Other bad TPS's will have 'dead' spots. If this happens, you'll notice that at a certain point, when you press the gas pedal, nothing happens. A way to test the TPS is with a Digital Voltmeter. You can manually rotate the throttle and watch voltages.
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From: Princeton, WV
Thanks fellows. I'm not sure if this helped DAAJR, but I'm willing to bet that tomorrow I'll have a months worth of headaches taken care of. I hope to post some pics of my truck soon, if I can find my freaking camera. Thanks again yall.
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Thanks everyone it sure did help. I've been so busy it took me a
month to get to it, and it only took a few minutes. I cant believe
Ive been putting up with this for so long.
Mine was on the top of the TB not the side though. It was a cylinder
about 1 1/2 by 3 inches. I disconnected the elctrical conecter then
unbolted it from the TB then two screws to remove the electronic
component. The cylinder had two holes in the bottom and a spring loaded
plunger down the middle. I used TB cleaner and a little brush and scrubbed
away, I was suprised to see how much black crud came out of the cylinder.
Sprayed out the TB as well, reassembled and TADA, runs great.
Thanks Again
Daajr
month to get to it, and it only took a few minutes. I cant believe
Ive been putting up with this for so long.
Mine was on the top of the TB not the side though. It was a cylinder
about 1 1/2 by 3 inches. I disconnected the elctrical conecter then
unbolted it from the TB then two screws to remove the electronic
component. The cylinder had two holes in the bottom and a spring loaded
plunger down the middle. I used TB cleaner and a little brush and scrubbed
away, I was suprised to see how much black crud came out of the cylinder.
Sprayed out the TB as well, reassembled and TADA, runs great.
Thanks Again
Daajr