The Permanent fix for lag in acceleration/ Rough Idle
04-08-04, 03:05 AM
#32
Lexus Champion
Originally posted by Pearlpower
Adjusting the throttle cable till the idle raises is the exact same as stepping on the gas pedal a tad to bring the engine speed up. It should not be adjusted to this level for idle operation. However, many seem to have a constant low idle issue and yes, this will cure it to a degree.
Last week while driving I noticed a significant change in my idle. Lower by 200rpms and a bit rough. Since I just serviced the car the prior week ,I rechecked everything. My older Nippo plugs were shot and were replaced with a new Iridium NGK set. I adjusted the TPS to no avail. Finally I remembered that I cleaned and oiled the air filter. I pulled the MAF and using a flashlight peered into the internals to check the wires.
They were "covered" with black crap. Completely covered. Obviously from an over oiled filter. I cleaned the wires with some carb cleaner and reset the ecu. Purrs like a cat and idles as smooth and great as it did when new.
This will not help all, but maybe some.
Lee
Adjusting the throttle cable till the idle raises is the exact same as stepping on the gas pedal a tad to bring the engine speed up. It should not be adjusted to this level for idle operation. However, many seem to have a constant low idle issue and yes, this will cure it to a degree.
Last week while driving I noticed a significant change in my idle. Lower by 200rpms and a bit rough. Since I just serviced the car the prior week ,I rechecked everything. My older Nippo plugs were shot and were replaced with a new Iridium NGK set. I adjusted the TPS to no avail. Finally I remembered that I cleaned and oiled the air filter. I pulled the MAF and using a flashlight peered into the internals to check the wires.
They were "covered" with black crap. Completely covered. Obviously from an over oiled filter. I cleaned the wires with some carb cleaner and reset the ecu. Purrs like a cat and idles as smooth and great as it did when new. This will not help all, but maybe some.
Lee
I think I will still leave my car to idle at 620-630ish rpm, the difference is only a little from 600. I drove around and have not experienced the braking problems that rmm and rominl mentioned. Heck, if anything, this helps my car to stay planted on an incline (rather than drifting slowly back as if out of breath).
09-25-04, 02:53 PM
#34
Lexus Champion
Originally posted by Ex996
does this fix work with an '03 drive-by-wire setup?
does this fix work with an '03 drive-by-wire setup?
09-25-04, 07:33 PM
#35
Pole Position
Hey guys. I too have the low idle problem with the AC off. I've read the thread and this solution seems logical, but I have one question. Maybe it will be obvious when I get in there, but once the nuts are loosened, which way do you pull the cable to tighten it?
e-man
e-man
09-26-04, 07:16 PM
#37
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Originally posted by e-man
Hey guys. I too have the low idle problem with the AC off. I've read the thread and this solution seems logical, but I have one question. Maybe it will be obvious when I get in there, but once the nuts are loosened, which way do you pull the cable to tighten it?
e-man
Hey guys. I too have the low idle problem with the AC off. I've read the thread and this solution seems logical, but I have one question. Maybe it will be obvious when I get in there, but once the nuts are loosened, which way do you pull the cable to tighten it?
e-man
09-26-04, 08:02 PM
#38
Lexus Fanatic
This is masking a symptom of something else, not fixing the problem. Like someone else said-you are just doing the same thing as resting your foot on the gas pedal. That's not how you adjust idle.Half *** fix for low idle. Removing slack for responsivness is different story.
09-27-04, 02:10 PM
#39
.02 cent comment, but wouldn't your MPG numbers diminish a tad on idle as well, since you are basically simulating pressure on the accel pad to raise the RPM levels?
Aside from the accel lag, I kinda like the low-end RPM at idle. Isn't not rough at all on mine, just purrrrfectly quiet tho'.
Aside from the accel lag, I kinda like the low-end RPM at idle. Isn't not rough at all on mine, just purrrrfectly quiet tho'.
09-28-04, 12:24 AM
#40
Lexus Champion
**UPDATE**
I went to the shop the other day and one of the technicians adjusted a little screw right on the throttle body using an allen key. He had the master tech sit on my driver's side looking at the RPM tach while he adjusts the screw very slowly by turning it. My car is obviously in park position, idling very low at around 500ish with the aircon on.
Lo and behold, as he turns the screw, the rpm begins to climb steadily until the master tech tells him to stop turning when the RPM touches 700prm. I know it's exactly 700rpm coz that's what my apex'i rsm is registering. I asked him if that's kinda high, but he said, that would be a good number for a twin turbo engine like mine. And he said, besides, you don't want your car to start rolling backwards on an incline do you?
Well, my problem is cured.
I don't know if you guys have that allen-screw thingie on your throttle body? It's black in color and it sitting smack right on top of the throttle body.
I went to the shop the other day and one of the technicians adjusted a little screw right on the throttle body using an allen key. He had the master tech sit on my driver's side looking at the RPM tach while he adjusts the screw very slowly by turning it. My car is obviously in park position, idling very low at around 500ish with the aircon on.
Lo and behold, as he turns the screw, the rpm begins to climb steadily until the master tech tells him to stop turning when the RPM touches 700prm. I know it's exactly 700rpm coz that's what my apex'i rsm is registering. I asked him if that's kinda high, but he said, that would be a good number for a twin turbo engine like mine. And he said, besides, you don't want your car to start rolling backwards on an incline do you?
Well, my problem is cured.
I don't know if you guys have that allen-screw thingie on your throttle body? It's black in color and it sitting smack right on top of the throttle body.
09-29-04, 04:13 PM
#41
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Originally posted by jtanoyo1
**UPDATE**
I went to the shop the other day and one of the technicians adjusted a little screw right on the throttle body using an allen key. He had the master tech sit on my driver's side looking at the RPM tach while he adjusts the screw very slowly by turning it. My car is obviously in park position, idling very low at around 500ish with the aircon on.
Lo and behold, as he turns the screw, the rpm begins to climb steadily until the master tech tells him to stop turning when the RPM touches 700prm. I know it's exactly 700rpm coz that's what my apex'i rsm is registering. I asked him if that's kinda high, but he said, that would be a good number for a twin turbo engine like mine. And he said, besides, you don't want your car to start rolling backwards on an incline do you?
Well, my problem is cured.
**UPDATE**
I went to the shop the other day and one of the technicians adjusted a little screw right on the throttle body using an allen key. He had the master tech sit on my driver's side looking at the RPM tach while he adjusts the screw very slowly by turning it. My car is obviously in park position, idling very low at around 500ish with the aircon on.
Lo and behold, as he turns the screw, the rpm begins to climb steadily until the master tech tells him to stop turning when the RPM touches 700prm. I know it's exactly 700rpm coz that's what my apex'i rsm is registering. I asked him if that's kinda high, but he said, that would be a good number for a twin turbo engine like mine. And he said, besides, you don't want your car to start rolling backwards on an incline do you?
Well, my problem is cured.
09-30-04, 09:50 AM
#43
Lexus Champion
Originally posted by LB Lex
Since it's been a few days now, how is your idle doing?
Since it's been a few days now, how is your idle doing?
So I can tell you guys right now, that this is indeed the PERMANENT fix for MY rough idling problem. My car idles perfect exactly right where it should be.
Have you guys checked with your mechanics if you also have the black allen screw thingie on your throttle body?
09-30-04, 09:54 AM
#44
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Originally posted by jtanoyo1
Have you guys checked with your mechanics if you also have the black allen screw thingie on your throttle body?
Have you guys checked with your mechanics if you also have the black allen screw thingie on your throttle body?
09-30-04, 11:44 PM
#45
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Originally posted by jtanoyo1
Have you guys checked with your mechanics if you also have the black allen screw thingie on your throttle body?
Have you guys checked with your mechanics if you also have the black allen screw thingie on your throttle body?
I guess this allen screw adjustment only works on the GS3
