Sticky Throttle?
#1
Honda-Tech Member
Thread Starter
Sticky Throttle?
When the engine has been sat in traffic and the fan has kicked in a few times, I've noticed the throttle 'sticks' open slightly.
if I switch the engine off and let the car cool for a few minutes the problem goes away.
What could this be?
A mechanic told me to spray some brake cleaner into the throttle butterfly to clean it up. He also said if it's not the throttle iftself it could be a sensor.
if I switch the engine off and let the car cool for a few minutes the problem goes away.
What could this be?
A mechanic told me to spray some brake cleaner into the throttle butterfly to clean it up. He also said if it's not the throttle iftself it could be a sensor.
#4
Honda-Tech Member
Thread Starter
#5
Re: Sticky Throttle?
Check for build up of grime around the rim of the throttle plate and near the shaft holding the plate. Could always take the TB off clean it with some degreaser then go from there.
#6
Honda-Tech Member
Re: Sticky Throttle?
My R does the same thing only in the summer time though. I can make it go away by getting the tip of my shoe under the gas pedal, and lifting a tad bit and the idle drops right back down. I feel like its just a gummed up throttle body.
#7
Honda-Tech Member
Thread Starter
Re: Sticky Throttle?
Thanks. Maybe your cable is a little tight? Could be my problem too.
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#8
Honda-Tech Member
Re: Sticky Throttle?
No worries! If it was too tight, I think it would have the high idle all the time no matter what. My issue only happens in hot weather mostly when I'm stuck in traffic. I think the throttle plate is gummed up (and the hot weather makes it more sticky) and so that it doesn't close completely once I let off the gas pedal. But it closes to its home position once I pull up on the gas pedal.
#9
Re: Sticky Throttle?
I've had the same issue with my 1996 ITR. Also only happens when it's warm outside and I've been driving a while in city traffic. My throttle cable is on the looser side as well.
#10
Honda-Tech Member
Thread Starter
Re: Sticky Throttle?
So far I've cleaned the spring and sprayed it with lithium grease, took the intake tube off and cleaned the TB and plate with some brake cleaner then a tiny amount of WD40 around the plate edges. I most likely won't know if this has worked for some time as I hardly drive the car!
For those who are having a similar problem I'd take a look at your throttle body and plate. Mine was pretty grubby in there, I suspect this was the issue.
For those who are having a similar problem I'd take a look at your throttle body and plate. Mine was pretty grubby in there, I suspect this was the issue.
#11
Honda-Tech Member
Re: Sticky Throttle?
I think you can use carb cleaner as well to clean the TB. Just obviously make sure the car is off when you're doing it, and that you wipe the surface dry again after it's soaked and cleaned everything up. Don't want brake/carb cleaner getting sucked through your intake.
#15
Re: Sticky Throttle?
Have you checked to aee if the Throttle Position Sensor is reading correctly when the
car is completely warmed up? This could be an electrical problem as some sensor inputs can cause a "sticky" idle.
I would warm up thr car until the rad fans cycly twice, then look into your service manual for the ECM inputs from sensors such as MAP, CKP, CMP, HO2S, ECT. The manual will tell you thresholds.
If you see a few sensors that are out of range, pull the witing diagrams for said sensors and see what they have in common.
I had a car similar to this and it was high resistance on the ground wire for the ECT, TPS and FTP sensor. The car had a higher than normal idle when coming to a stop.
car is completely warmed up? This could be an electrical problem as some sensor inputs can cause a "sticky" idle.
I would warm up thr car until the rad fans cycly twice, then look into your service manual for the ECM inputs from sensors such as MAP, CKP, CMP, HO2S, ECT. The manual will tell you thresholds.
If you see a few sensors that are out of range, pull the witing diagrams for said sensors and see what they have in common.
I had a car similar to this and it was high resistance on the ground wire for the ECT, TPS and FTP sensor. The car had a higher than normal idle when coming to a stop.
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