Fliptard

My buddy has a 2001 Prelude he bought with a blown motor. Bought a JDM H23a, We dropped it in, switching over the oil pump, dizzy, intake mani, and crank sensors from the h22.

The car will start and immediatly shut back off. If you sit there and spray gas into the TB, it will stay running, and as soon as you stop, the engine shuts off. The fuel pump, filter, dizzy, plugs, wires, COMPLETE ignition from key to the box that reads the key is all new.

After it shuts off, the fuel pump is still getting juice, so it's not a pump issue.

I have searched for HOURS trying to find something. The car has been at a dealership where the ingition was replaced and they tried to figure it out and they don't know whats wrong with it. It's almost like it's shutting the injectors off at the rail.

The only things I can possibly think after doing more research tonight was use a diff ECU, something with obd2a and obd2b, or something with the wiring. It's the orig harness from the h22 also.

Thanks to anyone who can help me out.

B serious

iTrader: (1)

Well if you can get it to run by spraying carb cleaner in there, it's probably just not getting fuel.

Are there any check engine lights? My bet is that you got some plugs switched up. It's very common, for example, to get the MAP and TPS plugs mixed up. They're the same shape/style plug. Try switching those around.

Which injectors are you using? What ECU? Since the ignition and key is new...does the ECU still have the immobilizer? Are the keys programmed to the ECU?

Fliptard

I've checked over all the plugs multi times, everything is right. And the Dealership looked through the wiring harness as well and said it's all good. I'll get more info on the ECU tomorrow.

I do believe the rail and injectors are the h23, cuz when it was at the shop my buddy took the intake mani down so they could switch that over. Used the Mani from the h22 also, the h23 was an from an auto and he said something was different and where he got the motor they said to use to h22 mani.

As from what he told me, the immobilizer was changed and idk what else they did, will get that info as well tomorrow. But that could possibly be it, if they didn't sync in to the ECU.

Or maybe the h23 Mani needs to be used.. I have no idea. He also heard to use the h23 Mani, but take the top part off, where the TB bolts (don't know exact name) and put the h22 one on and do it that way.

B serious

iTrader: (1)

The manifold itself wont dictate whether the car runs or not as long as it bolts up. It's just a peice of metal. You have to use atleast the top half of the H22 manifold because you need the IAC from the H22 to make it work. I would definitely use the H22 rail and injectors. I'm thinking the H23 has the same weird injectors as the F20B.

Leave the manifold alone. Swap over the H22 injectors. Check to make sure the immobilizer isn't activated.

Start there.

Fliptard

Ok, new news. Seeming how the dealership is completely retarded and didn't even hook a comp up to the car, And he got a good comp and found out the Crank sensor is bad, gonna change it in the am and see what happens.

Fliptard

Ok, So we changed the crank sensor, still no go. We can get it to start and idle by spraying gas into the TB and after a few seconds it'll idle by itself. Next step is he is checking the volts at the crank sensor and the cranksensor at the ECU, it's starting to look like a bad ecu or faulty wire between the sensor and ecu

Fliptard

Also... it's a 1999 Prelude, my bad :x

minilogoguy18

^Did you get the proper lower timing gear and the metal thing that goes between it and the oil pump so the sensor can read?

Someone I work with just did a Type S swap for someone and had to even use the balance gear on the crank as well from the H22a4.

Fliptard

Yes, we used the oil pump and spocket from the h22. It has the ring forged onto the sprocket for the TDC sensor.

eucalyptusbb6

i just did an f20b swap on my 97. easy swap. us oil pump and dizzy used. same problems you had. after 2 weeks of investigation i found the problem. after cleaning up some parts i found the old balancer belt crank gear. it is different from the jdm h23/h22/f20b crank gear in that it has different pickups on the back of it. you not only have to use the usdm crank shaft timing gear but balancer belt gear as well. after it was put on i kicked myself for not thinking of that. i thought my sensor was bad too. check it out. hope that solves your problem.

Fliptard

I kinda figured something wasn't reading right. now that U said that Iand I thought about it, that has to be the issue! I'm not sure which one he used, but I told him and he's gonna look at the other one he has either today or tomorrow and change it.

Hopefully that solves this issue!

Thanks man.

minilogoguy18

It more than likely is, already told you do do this like a week ago since it was the same reason a type s swap was throwing the same code. >_>

Fliptard

My bad, for some reason I thought you were talking about the timing gear itself >.<

gheezy

use the h22 IM, injectors and fuel rail if you havent done so as well.

Fliptard

Car runs!!! i was the balancer belt pulley. When he switch motors and used everything from the h22, except that gear for some reason... Thanks for all the help guys!!

eucalyptusbb6

congratulations. another prelude is kept alive.!!!!

onepoint6i

This **** saved my *** today. Thank god for Internet forums.

Caarlos86

Ok guys i have done the same thing. Problem with mine is that it throws in the CEL for a crank position sensor when it isnt. Everything from the Oil pump was transferred over from my block to the jdm h23. When i start it it bounces between 1000 to 0 on and off til it holds at 1500. Then when i drive it wont go over 3500 rpms.

holmesnmanny

You need the crank timing pulley too.

Fliptard

yes, make sure you have ALL the pulleys and rings off the crank from the old motor, and not going passed 3500 is prolly the TPS sensor

Caarlos86

The TPS is from the original motor. Im also using a chipped p28 with a jdm h22 map. I will have to check to be sure everything is in place. I will most likely get on it next saturday. Snow storms in philly killing me. Thanks

Caarlos86

Hey guys I recently checked out the crank sensor and aparently i used the wrong gear for the sensor to pick up. Should have used the h22 gear with the teeth for the sensor to read. Revs like a monster but throws a CEL 24 now. Im not sure if it has to do with the idle or not.

ECKOHOMIE33

common thing when swaps are done is that the map and tps connectors get switched, check that.