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B20a problems - Is this site active?

 
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Old 12-09-2015, 10:22 PM
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Icon2 B20a problems - Is this site active?

I bought a 91 prelude but I'm not sure if the engine has been swapped? Any help? It's a91 prelude b20a 2.0 si 5 speed . not a gold top and only says b20a not b20a5 or any digit after the "a".
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Old 12-10-2015, 12:41 AM
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Re: Is this site active?

It's most certainly swapped. The United States did not receive Preludes with the B20A.
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Old 12-10-2015, 05:58 PM
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Re: Is this site active?

I'm not sure when it was swapped.. But the car runs smooth check engine light is on. I was told it had something to do with the tps. Was the b20a a good motor?
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Old 12-10-2015, 06:09 PM
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Re: Is this site active?

Yes, the b20a is a good engine. I've owned a couple of them. Not really much difference between it and the b20a5 that your car came with. Especially since you probably still have your original ecu and intake/exhaust manifolds. The only real difference is that the b20a pistons are slightly less dished than the b20a5 pistons.
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Old 12-10-2015, 07:21 PM
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Re: Is this site active?

Put one in mine and runs dead perfect.That japanese engine doesn't come with an egr valve. Do you have one on yours?I had to keep my American intake manifold so I could pass emissions. Just curious.
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Old 12-10-2015, 07:28 PM
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Re: Is this site active?

Quote:
Originally Posted by Lespaul59 View Post
Put one in mine and runs dead perfect.That japanese engine doesn't come with an egr valve. Do you have one on yours?I had to keep my American intake manifold so I could pass emissions. Just curious.
He's in California. You can bet he still has his stock manifolds and ecu (meaning he also has an egr) in order to meet that state's strict emission standards. I would have gone with the JDM manifolds and ecu if either b20a I've owned would have come with those because we don't do emission testing where I live. The b20a is rated a little higher in hp and torque than the b20a5, but only if you were using the whole thing along with the ecu.
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Old 12-11-2015, 01:37 AM
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Re: Is this site active?

Guess you're right. I still kept the intake though. I don't need it but someone might I guess.This is my last year for emissions in this state cause it just turned 25 years old. Time to pollute!

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Old 12-11-2015, 10:57 AM
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Re: Is this site active?

Don't use the b20a intake manifold without the matching ecu. Your ecu will throw a code 12 for the missing egr.
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Old 12-20-2015, 07:43 PM
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Re: Is this site active?

My b20a runs perfectly fine. No problems but I still don't understand what this egr does. Help please. I need to pass the smog check and yes I'm in California. I was considering a b20a ecu but egr....?? Anybody
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Old 12-20-2015, 09:52 PM
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Re: Is this site active?

Quote:
Originally Posted by B20si View Post
My b20a runs perfectly fine. No problems but I still don't understand what this egr does. Help please. I need to pass the smog check and yes I'm in California. I was considering a b20a ecu but egr....?? Anybody
Wait, which intake manifold are you using? Is it a b20a or b20a5 intake manifold? Which exhaust manifold are you using? B20a or b20a5? Please include a picture of your engine bay, specifically the exhaust manifold area. I suspect that you have the stock b20a5 intake and exhaust manifolds, which will have the egr tube and egr valve. Running the b20a5 ecu with the b20a intake and exhaust manifolds will throw a code 12 because there is no provision for the egr system.

You won't need an egr system if you run the b20a intake and exhaust manifolds as far as codes go, but you will not pass California emissions without an egr system.
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Old 12-22-2015, 03:30 PM
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Re: Is this site active?

Not so pretty..
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Old 12-22-2015, 08:29 PM
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Re: Is this site active?

I'm having a hard time believing your engine is running with no issues. The last picture shows that your TPS (throttle position sensor) is unplugged. At the very least you should be seeing a code 7. Have you checked for any stored trouble codes?

You're using the stock USDM intake and exhaust manifolds. You have an egr valve and tube on that engine.
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Old 12-22-2015, 10:16 PM
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Re: Is this site active?

I know that the ecm controls the opening of the egr valve and it looks at certain things. I hope that tps isn't one of them. The egr solenoid is grounded to the ecm so you might wanna fix that.To see if your egr valve is clogged or opening, Disconnect the vacuum tube going to the egr valve and revv the engine from the 1500 to 2500 rpm range.You should draw a little vacuum at the end of the tube. That will tell you if the ecm is telling the egr solenoid to work. Most of us disconnect the egr hose at the other end near the black box and at idle suck on it to recreate vacuum to the egr valve. The engine should sputter or die completely. That'll tell you if the egr valve is clogged or the 4 pin holes in the intake are clogged. Give that a try
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Old 12-26-2015, 06:23 PM
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Re: Is this site active?

Am I the only one seeing that the EGR is harness is not even plugged??

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Old 12-26-2015, 11:09 PM
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Re: Is this site active?

There is a lot of monkey business in that engine bay for sure!
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Old 01-01-2016, 04:16 AM
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Re: Is this site active?

Yes I bought the car with some issues. Check engine light is on. I was told that the tps was disconnected and that was the only problem .i haven't had time to check it out.I asked for the sensor at O'Reillys but they want me to buy a new throttle body instead. I have driven the car as is 100 mile trips back and forth recently without a problem . I'm confused.
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Old 01-01-2016, 09:38 AM
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Re: Is this site active?

Sounds like you should go have it tested before it's due and see what results you get...
I mean it sounds like the car shouldn't even start much less run ok...but you indicate it runs fine.
Yeah the cel is annoying but it can have a hidden toggle switch added to make it go away at certain times if need be...
Whatever magic is keeping the car running fine may be powerful enough to allow the emissions to pass an inspection.
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Old 01-04-2016, 01:18 AM
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Re: active?

Rpms too high? I'm in 5th gear. +no seatbelt
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Old 01-04-2016, 01:32 AM
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Re: active?

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Originally Posted by B20si View Post
Rpms too high? I'm in 5th gear. +no seatbelt
I can't tell you what your rpm's should be at 85 mph because my lude is out of commission we don't have any roads with a speed limit any higher than 60 mph in this area. I'm not adverse at going that fast, but I honestly have never looked at the tach when I was. I can tell you that at 60 mph you'll be seeing right around 3k rpms. I'm not surprised if you're seeing that kind of rpm's at that speed. Our engines were designed to rev high, and are actually pretty efficient spinning that fast. Are you worried that your tach is wrong?
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Old 01-04-2016, 02:19 AM
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Re: Is this site active?

No problems so far... I thought I was going to ruin my car since the rpms stay that high.
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Old 01-04-2016, 10:14 AM
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Re: Is this site active?

My 91 manual is 3,000 rpm's at 60 mph like Luzer said. But my 90 automatic does 2800 rpm's at 60 mph. Maybe cause of the torque convertor lock up or the gearing ?
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Old 01-04-2016, 07:08 PM
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Re: Is this site active?

It's been mentioned before that the auto 3rd gens are geared taller than the manual models. Somewhere there is a thread listing the gear ratios for many 3rd gen varieties.
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Old 01-04-2016, 07:14 PM
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Re: Is this site active?

Where do you guys get parts? I use carid.com but I need a new source
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Old 01-09-2016, 06:27 PM
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Re: Is this site active?

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Originally Posted by B20si View Post
Where do you guys get parts? I use carid.com but I need a new source
When you ask about parts, you need to specify.
We do not get most parts like the civics and newer Hondas, because our chassis is different.

Most of the time parts are sourced through junkyars, part outs, for sale ads, craigslist locally and Nation wide.
Forums sometimes depending on how active it is and there really is only two active forums.
FaceBook groups for 3rd gens.

Some parts that are common like brake pads, rotors etc can be gotton at parts stores but other than that what I listed above is the only other sources.

So specify what parts you are looking for.
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Old 01-09-2016, 06:35 PM
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Re: B20a problems - Is this site active?

I've been looking for a tps sensor and been told to replace the whole throttle body so that's a start for me.as far as body parts I won't be needing any soon and thanks anybody willing to help.
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Old 01-09-2016, 06:38 PM
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Re: B20a problems - Is this site active?

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I've been looking for a tps sensor and been told to replace the whole throttle body so that's a start for me.as far as body parts I won't be needing any soon and thanks anybody willing to help.
You should be able to use the tps sensore from most honda throttle bodies.
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