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So your 'lude hesitates/bogs you say?

 
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Old 06-12-2012, 09:22 PM
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So your 'lude hesitates/bogs you say?

Ok so I have noticed that bogging/hesitation in the 1-3k rpm range is pretty common among 5th gens(not sure about other generations) and I myself have been a victim of this. So I decided to make a thread to try to help people with this problem in the future, possibly a sticky or added to the resource guide? Other people feel free to add your input since I am sure I will leave something out or there are some things I'm not aware of. Well, let's get down to business then.

The hesitation I am talking about is when you are at low rpm's in any gear your car just doesn't want to go and then when you punch the gas it hesitates for another second or so and then takes off like a raped ape, kinda like hitting vtec but you're not really anywhere near the rpm range for vtec to engage. You also may notice that when you are just cruising in say 5th gear your car seems to buck or suddenly get alot more power. Hopefully this is enough explanation for anyone to narrow down that this is what they are experiencing or not. Now on to possible culprits and solutions.

First and foremost I highly recommend a quality tune up if you have not done one in a while. This includes spark plugs, spark plug wires, fuel filter, oil change, air filter, seafoam treatment, maybe even go as far as a tranny flush and new distributor cap and rotor. I recommend doing this first because these are all things that should be done pretty regularly anyway so if they don't solve your problem you aren't really wasting your money and time. Ok so you have done all of these things and you are still having problems? Cleaning your egr valve and the ports could help immensly, this stuff gets clogged up with carbon really bad. It is very important that you clean the ports and not just the egr valve. There are great videos on how to do this on youtube. this is for the egr valve: . And this one is for the ports: this is on an accord, but it is very similar.
Now if you are still having problems a valve clearance adjustment would be my next step, this is pretty simple and if you have some mechanical know how and proper tools shouild be a diy. there is a great write up for it on here and some great videos on youtube once again.
All of these things mentioned above seemed to help my prelude's hesitation problem, but never got rid of it. So finally what ultimately solved my hesitation problem was the oxygen (o2) sensors. Personally I bought new ones from sparkplugs.com, but I have been told that you can soak them in seafoam and it will clean all of the carbon build up off of them. I'm sure I am leaving out some stuff here so everyone please feel free to add to this and hopefully this thread will help at least one very frustrated 5th gen owner in the future.
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SHdriver once told me that some preludes lose vtec after a while. I think you need to take it to Honda and RE-Vtec-a-lize it. Just my .02
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Old 06-12-2012, 11:27 PM
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Re: So your 'lude hesitates/bogs you say?

WOW, I have done everything you mentioned except clean the EGR "Ports" and 02 sensors. Still have a small hesitation issue so I may give those a try and see if that fixes my issues.

Did you replace both 02 Sensors?
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Old 06-13-2012, 12:00 AM
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Re: So your 'lude hesitates/bogs you say?

excellent
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Old 06-13-2012, 12:08 AM
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Re: So your 'lude hesitates/bogs you say?

yes i replaced both 02 sensors.
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SHdriver once told me that some preludes lose vtec after a while. I think you need to take it to Honda and RE-Vtec-a-lize it. Just my .02
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Old 06-13-2012, 12:09 AM
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Re: So your 'lude hesitates/bogs you say?

Great write up! My lude has a slight hesitation at low RPM's so I'll try a few of these things. Thanks!
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Old 06-13-2012, 01:48 AM
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Re: So your 'lude hesitates/bogs you say?

glad I could help, good luck. come on everyone, there has got to be something more than what I covered?
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SHdriver once told me that some preludes lose vtec after a while. I think you need to take it to Honda and RE-Vtec-a-lize it. Just my .02
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Old 06-14-2012, 11:35 AM
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Re: So your 'lude hesitates/bogs you say?

I did everything in the OP - Cleaned EGR, flushed Manual Trans, New Distributor Cap/Rotor/O-Ring, New Spark Plugs, Magnecor Wires. Still had bad hesitation. Then I replaced the Front O2 sensor (rear is for monitoring purposes only, no need to change unless you're throwing a CEL) and the hesitation was gone. Also did the Fuel Filter at the same time as the O2, but almost positive it was the O2.

There is a test in the FSM where you can hook up an OBDII scanner and start the car. You hold the RPM at 3,000 and read the real-time voltage of the front O2 sensor. If it stays between 0.3 and 0.7 Volts, the sensor is within tolerance; however mine was reading as high as 0.85 V and as low as 0.2 V on a warmed-up engine. This convinced me I had a "deteriorated oxygen sensor" as the FSM calls it.
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Old 06-14-2012, 05:37 PM
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Re: So your 'lude hesitates/bogs you say?

Hm... very interesting.. I've done everything except for the tune up, but I will go with replacing the front o2 sensor.
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Old 06-15-2012, 09:31 AM
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Re: So your 'lude hesitates/bogs you say?

i'm still trying to learn about my prelude so please forgive my ignorance, but what are these ports that he is drilling in the first video. And furthermore what do you do after you have drilled and cleaned them. Are there new plugs one must obtain before beginning the job.
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Old 06-15-2012, 11:07 AM
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Re: So your 'lude hesitates/bogs you say?

they are egr ports and yes you have to get new plugs, you can get them at your local honda dealer
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SHdriver once told me that some preludes lose vtec after a while. I think you need to take it to Honda and RE-Vtec-a-lize it. Just my .02
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Old 06-15-2012, 12:03 PM
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Re: So your 'lude hesitates/bogs you say?

nice write up. I'm done all those things except the O2 since i'm waiting for my new exhaust header. Hopefully this will cure my problems
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Old 06-18-2012, 07:10 AM
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Re: So your 'lude hesitates/bogs you say?

I was talking to my buddy who had a f20b bottom end and a h22a top end and he said he was havingthe same problem (I also have this unfortunate lag problem as well) and he changed his TPS( throttle position sensor) and he said that it took away the lag for the most part , we both haven't changed the front o2 sensor so we will probably try that next. Thank you very much for the write up, I didn't even think about that o2
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Old 06-25-2012, 11:26 AM
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Re: So your 'lude hesitates/bogs you say?

Bump for a helpful Thread. Maybe a Re-title would help people find this. Perhaps in the DIY section, "EGR/Port Clean"
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Old 03-20-2013, 08:58 PM
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Re: So your 'lude hesitates/bogs you say?

if you haven't done this before, or are new to working on cars, I would be careful. and don't get in over your head. I just cleaned the valve, and it was fine. i'm still having the problem, but I think the o2 sensor
is bad.
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Old 03-20-2013, 09:03 PM
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Re: So your 'lude hesitates/bogs you say?

Incredible man. Im booking marking this thread so I dont lose it haha. Thank you.
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Old 03-20-2013, 09:08 PM
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Re: So your 'lude hesitates/bogs you say?

Who's got an opinion on a good 02 Sensor brand? AutoZone or OEM?
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Old 03-20-2013, 09:44 PM
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Re: So your 'lude hesitates/bogs you say?

Same here, right at 2700 Rpms the car hesitates and than kicks off. It's weird. Egr was cleaned 6k miles ago, distributor cap replaced, spark plugs replaced, plug wires in ohm spec, and the only thing I can no replace is the rotor due to the notorious stripped bolt.. I'm sure that'll help so much.
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Old 03-20-2013, 10:27 PM
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Re: So your 'lude hesitates/bogs you say?

Subscribed. This is very helpful! I really didn't want to pay the dealer to adjust the valves and seeing the video gives me a much better idea of what it takes. My car bogs as well at lower rpms when I let go of the gas, whether I let off the gas gradually or immediately. Just put in the oem intake, cleaned the throttle body, replaced the Vtec Solenoid filter (wasn't leaking and which by my eye looked fine, but it was a little brittle). The above things are definitely on my to do list.

Last edited by hondaninja; 03-20-2013 at 10:31 PM.
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Old 03-21-2013, 02:36 AM
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Re: So your 'lude hesitates/bogs you say?

Quote:
Originally Posted by JarrodL08 View Post
Who's got an opinion on a good 02 Sensor brand? AutoZone or OEM?
oem are so expensive that I have used replacement ones for years without problems.
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Old 03-21-2013, 03:19 AM
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Re: So your 'lude hesitates/bogs you say?

I have a 97 Prelude that i bought from homeboy.
it runs like a champ even doe he had wrecked it and front bumper is dented in.

so i wanted to fix the dent and take out both radiator and fan motor
and when i unhook the radi i toke off a bolt from each side and when i did
some liquid sprayed out. did not take so good lol

so my question is taking out that bolt would lead my car to rev and to stall now when i put my car and drive i got to give it alot of gas to move.??

what else could it be?
i put everythin back in place and now i have this problem
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Old 03-22-2013, 01:03 PM
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Re: So your 'lude hesitates/bogs you say?

i just got the p0401 code, and its still cold where i live so i dont feel like drilling the ports, is it safe to drive with this code for a couple months? i havent noticed any performance issues since the code has came on. has anyone used seafoam to clean the ports? thanks
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