I have posted many topics in this forum trying to get help to fix my Idle problems. A couple days ago, I read that someone use Sea Foam to clear up there Intake. Today I tried it and usually by the time I make to my first stop sign the car would stall. Now the car has only stall after I used VTEC. I am going to repeat what I did today, and see if it helps even more.

What is the spec Idle for a prelude, (H22A)?

 

My V-AFC reads right around 700rpm idle.

 

I am still only getting about 300 to 400 rpm's

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JBirch_97Prelude &raquo;</TD></TR><TR><TD CLASS="quote">Now the car has only stall after I used VTEC. </TD></TR></TABLE>

Maybe you're out of VTEC fluid?



Factory specs should be around 750 +-500 rpms.

Check all of your vacuum lines. Then run a compression test.

 

sea foam works make sure u flush it out after running it hard

 

Personally I would just take the IM and TB off and clean them and then do routine maintainence on the car. But i have no doubt seafoam cleans deposits. On my h22a4 with 110k i used it helped alittle and had no bad effects. Compression was around 210 across and no oil burning so im happy with it. But i wouldnt go crazy with that stuff and use it more than one or two times.

 

i am having idle issues as well. yesterday i took off the throttle body and cleaned it now my idle isn't low anymore its around 1k now it used to be really low like you. but it poped a code P0505 malfunction in the idle control system i'm going to do some tests today to see if its the IAC or the FITV hopefully its not a blown head gasket, leak in the IM gasket.

when you make turns does your idle bounce?

when you put your car in neutral to coast does your idle drop then it suddenly bounces then goes steady again?

check into this and let us no. you may have the same issue as myself and if you do i can help you out a little better by letting you no what i have done and what effect it has with my car

i have a 5th gen

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by thaiswirls &raquo;</TD></TR><TR><TD CLASS="quote">when you put your car in neutral to coast does your idle drop then it suddenly bounces then goes steady again?</TD></TR></TABLE>
Exactly, we even tuned the IACV and the the screw on the throttle body to get it to Idle at 750 RPM's. It did not help.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by thaiswirls &raquo;</TD></TR><TR><TD CLASS="quote">when you make turns does your idle bounce? </TD></TR></TABLE>
Yes, but off and on!

 

ok #1 did you clean the IAC valve??

#2 you can test the IAC valve. When the car is on the plug that goes to the IAC valve unplug it if the car sputters or stalls or goes down in RPM then the IAC valve works and you have another problem on your hands. If it doesn't do anything then the IAC valve is the problem.

Have you cleaned your throttle body? there are a couple tests you can run on the throttle body as well.

Have you checked your coolant levels? If its low fill it, if its full then try bleeding it to make sure that there is no air in the lines.

also just changing the idle screw isn't going to help you its like putting a bandaid over the problem it'll only make things worse in the long run. you gotta find the problem of this whole thing.

What do you mean by when we tuned the IAC valve???
after you have done all that or if you have already get back to me

 

We turned the idle screw, and then plugged the IACV back in, because if you don't the IACV will just adjust and turning the screw won't help!

 

did you check what was in my previous post?

 

Yes, I did and thanks for all your help. The only thing I have not done is bleed the coolant. Also I did the throttle body test by placing my figure over the bottom hole!

 

i have a 5th gen prelude. no i have not checked the coolent.

 

I drpped it off at Honda, I am tired of trying to figure this out!

 

dude thats how you learn, but its cool. post the results and how much they are charging you, as well as what parts need to be replaced

 

I will no tomorrow so look out for my post!

Also the service representative said that if I still had all the original equipment, (H22A4) instead of a H22A all the parts would have been free to fix because of recalls on the emissions components. That does not mean that my emissions system is the problem only that it my have helped. Also he said because the car had been modified they may not be able to fix it!

 

well there was a law passed that only the items modified are voided. Is your car a 97? that year was the year that was effected by the emission warrenty so if your 97 you get a free tune up. i got a 99 so i think the only recall on mine was the ignition coil i need to get it checked out

 

The only thing modified is the engine, and distributor. So are you saying that the other parts qualify for the recall?

 

Honda could not tell me ****! They wanted 5 more hours to figure out the problem!

 

i figured they couldn't find anything hahaha my buddy did the same thing. i bet they are going to adjust your idle and charge you a **** load of money...... thats what they did to him.....

 

would a valve adjustment help if theres sputtering? maybe the valve is opening and closing over its opperational spec. perameters

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by thaiswirls &raquo;</TD></TR><TR><TD CLASS="quote">i figured they couldn't find anything hahaha my buddy did the same thing. i bet they are going to adjust your idle and charge you a **** load of money...... thats what they did to him.....</TD></TR></TABLE>

Exactly! Now my Idle is all weird! I replaced the EGR Valve and there was no change also!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mattsnooz &raquo;</TD></TR><TR><TD CLASS="quote">would a valve adjustment help if theres sputtering? maybe the valve is opening and closing over its opperational spec. perameters</TD></TR></TABLE>

Maybe, how can this be checked?

 

Pull spark plug wires, pull plugs, remove cover bolts, take rocker cover off then using feeler guages measure the amount of play on each of the intake and exhaust valves. Do a DIY valve adjustment search and a full description is provided. Usually a valve adjustment is needed (as part of regular maintanance) when you hear a constant ticking at idle typically. usually results in poor gas mileage, rough idling. Also try IAC valve ontop of throttle body. might not be allowing air to bypass properly in order to keep car running at even rpm

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mattsnooz &raquo;</TD></TR><TR><TD CLASS="quote">Pull spark plug wires, pull plugs, remove cover bolts, take rocker cover off then using feeler guages measure the amount of play on each of the intake and exhaust valves. Do a DIY valve adjustment search and a full description is provided. Usually a valve adjustment is needed (as part of regular maintanance) when you hear a constant ticking at idle typically. usually results in poor gas mileage, rough idling. Also try IAC valve ontop of throttle body. might not be allowing air to bypass properly in order to keep car running at even rpm</TD></TR></TABLE>

My prelude is not doing that, it is just stalling on every stop!