Been having some low idle issues. I fixed the problem but need some advice.
Ok I cleaned the throttle body. Didn't help anything.
Went ahead and cleaned the IAC valve, still nothing.
Replaced PCV valve. Still low idle problems.
Then I went by gut instinct and adjusted the throttle body adjuster bolt. Fixed the problem, or at least improved it by a ton.
I rotated the bolt 360 degrees counter clockwise. A full turn lol. Is that gonna create any problems for me in the future? Right now my idle is back to normal, but I am worried that I adjusted the bolt too much.
Idk what can cause your problem, but I can tell you what I've did cause I experienced the same. I tight the screw to the FITV, clean IACV, and adjust the throttle cable, changed TPS cause it was bad and i hate the bogging. cold idle 1200, then warm around 900.
my car used to have issues holding a low idle,it would would just stall out half the time. i cleaned my IACV and adjusted the bolt as well almost 2whole turns. added some tread lock to hold the bolt in place and havnt had any problems. been running it like this for a couple months now
Do you have a intake of some sort? If you removed the factory oem induction box and replaced it with any kind of cone filter your problem sounds normal. My lude did the same thing, theres more air going into the motor then is necessary for factory ECU settings. So the computers constantly trying to adjust, if it bugs you that much you can take in for a tune. That would solve your problem, but not worth the money if only reason for tune.
well my low idle is gone. But now i sometimes have flunctuating idle when I'm at a stop sign or red light. I did everything people told me to do in this thread. Cleaned everything, replaced some parts etc.
My car is due for a timing belt soon, I hope that will solve the problem.
I cleaned EGR FIT IAVC, new PCV, cleaned TB . New radiator, flushed cooling system, Full tune up and many other things. I tried it all. The idle sometimes flunctuates up and down. There is nothing that I didnt do, I did it all.
hmmm.... only other things i can think of possibly having anything to do with it is maybe a clogged or bad fuel-filter. Or if you resources allow, do a cylinder leak-down test and make sure your rings are holding up. Its a stab in the dark but if ones really off, when the banks fire in pairs one set fires hotter then the other. Which might throw off the ecu causing the flux. I wont lie that could be a bunch of bull, But it makes sence in my head haha
well my low idle is gone. But now i sometimes have flunctuating idle when I'm at a stop sign or red light. I did everything people told me to do in this thread. Cleaned everything, replaced some parts etc.
My car is due for a timing belt soon, I hope that will solve the problem.
I cleaned EGR FIT IAVC, new PCV, cleaned TB . New radiator, flushed cooling system, Full tune up and many other things. I tried it all. The idle sometimes flunctuates up and down. There is nothing that I didnt do, I did it all.
Check some of the old threads about cleaning the EGR ports along the intake manifold. Involves taking out the port caps, cleaning out the passages going to the EGR valve, cleaning the EGR valve, and replacing the port caps. (search for EGR PORT CAPS and it should take you there) I guess it takes a couple hours, but makes a heck of a difference.
I just ordered the port caps for mine (40 cents each... no biggy) and will be doing the cleaning sometime in the next couple of weeks. Only cost is $2.40 and some of my time.
hmmm.... only other things i can think of possibly having anything to do with it is maybe a clogged or bad fuel-filter. Or if you resources allow, do a cylinder leak-down test and make sure your rings are holding up. Its a stab in the dark but if ones really off, when the banks fire in pairs one set fires hotter then the other. Which might throw off the ecu causing the flux. I wont lie that could be a bunch of bull, But it makes sence in my head haha
Thanks for the info! I will get a new fuel filter.
Quote:
Originally Posted by my97lude
Check some of the old threads about cleaning the EGR ports along the intake manifold. Involves taking out the port caps, cleaning out the passages going to the EGR valve, cleaning the EGR valve, and replacing the port caps. (search for EGR PORT CAPS and it should take you there) I guess it takes a couple hours, but makes a heck of a difference.
I just ordered the port caps for mine (40 cents each... no biggy) and will be doing the cleaning sometime in the next couple of weeks. Only cost is $2.40 and some of my time.
Thank you mate! I had the full EGR system cleaned. I heard that I need to drill holes,but will hold off on that. Are u sure this can be causing flunctuating idle at a stop with engine fully warmed up?
If they didn't drill those EGR ports out and scrape out the little passages that connect all the ports that go to the EGR valve and vacuum it out, I don't imagine the EGR system would be fully clean.
Whether I am SURE that it is causing your fluctuations... no... there are so many things that it could be... but based on reading a bunch of these threads about idle problems, many of them seem to have cleaning those EGR ports as a solution. Everybody that did it has said that it helped the cars running properties immensely, so it couldn't hurt!
__________________
-1992 Honda Accord DX... sold
-1993 Honda Accord EX 5spd...Sold
-1991 Honda Prelude SI... Sold
-1989 Honda Prelude AWS... Sold
-2002 Honda Civic EX... Sold
-Now-1997 Honda Prelude 5spd Base model with SH engine and Tranny... In the process of restoration.
^ ok thanks! I will put that on my list of things to do!
appreciate your help!
No problem... been working on these Hondas since about 1996... first 5th gen I've owned. I've got quite the list going for this car as well and this forum is an awesome place to get answers I've found!
Good luck!
__________________
-1992 Honda Accord DX... sold
-1993 Honda Accord EX 5spd...Sold
-1991 Honda Prelude SI... Sold
-1989 Honda Prelude AWS... Sold
-2002 Honda Civic EX... Sold
-Now-1997 Honda Prelude 5spd Base model with SH engine and Tranny... In the process of restoration.
No problem... been working on these Hondas since about 1996... first 5th gen I've owned. I've got quite the list going for this car as well and this forum is an awesome place to get answers I've found!
Good luck!
I agree!
I think this forum holds the most and the best Prelude info than any other forum out there.
if youre going to clean the egr chambers of the mani properly you should really take off the manifold. make sure the diaphragm of the egr is good and the plunger moves in and out smoothly.
its not an easy job, but it aint rocket science. main things youll need: egr valve gasket, intake manifold gasket(s), tb gasket, lots of gasket remover.
im sure your tps is fine, youll know when that goes bad.
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But it makes sence in my head haha
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