Help! JDM motor swap - Honda Prelude Forum

buffmanextreem · 02-12-2004, 12:43 PM

I just had a JDM H22 installed and there is a problem. The car will start to bog down when the throttle is pushed down more than 1/4th of the way. We identified the problem as being the fuel pressure. At first it was reading about 25psi. Then we replaced the fuel regulator and the reading was 30psi. We have double checked everything! Your help is greatly appreciated.

L-U-R-C-H · 02-12-2004, 03:02 PM

Hey does it usually happen when you are driven the car around for a while and then parked it for say 5-10 minutes and then when you begin to drive again, at the beginning it bogs???

Cuz I have that problem...

[SUB[EX] · 02-13-2004, 08:28 PM

timing, did you set the timing properly? How is the engine Idling. Ohhh you know what, if the IAC isnt plugged in it will do that.

4bidden · 02-13-2004, 08:59 PM

Sounds like the ol' hesitation caught another victim. Let us know if you fix it.

Keith · 02-13-2004, 11:48 PM

Question on related subject... I read that all non-VTEC ludes are prewired for VTEC. I found the VTEC Solinoid wire/plug and the light blue VTEC Oil pressure wire... but I'm not sure where the red/black wire is for the ground wire. There is one on another harness but it's a much thicker gauge wire than the other wires. Any idea guys?

Keith

Whitea207 · 02-14-2004, 12:43 AM

Sup chase (i think thats ur name) i thought u we're going turbo with ur h23? i remember last time we met up b4 a sonic meet u had ur engine port and polished and everything else. Whatever happpened to that?

Preyluder · 02-14-2004, 05:50 PM

Hmmm, FPR, I guess I could see if mine's reading okay, it's a possibility. All I know is this hesitation problem is making me want to NOT modify the engine so I can save up for a motor swap. It's really pissing me off.

[SUB[EX] · 02-16-2004, 08:25 AM

mine wasnt pre wired. 92 S
Did you look at the things i mentioned?

red92s · 02-16-2004, 08:39 AM

Quote:

Originally posted by Keith
Question on related subject... I read that all non-VTEC ludes are prewired for VTEC.

Some is, some aint. I dont think we ever established an actual pattern or scheme as to which cars got the VTEC wiring and which ones didnt.

My VTEC solenoid is grounded to the block, so there is no ground wire in the harness for it.

Keith · 02-16-2004, 12:09 PM

Yeah, I just put the ground by the negative by the fuse box.

Keith

prelude styl · 02-16-2004, 12:15 PM

To answer your guys' question-
All Si's are prewired for vtec. Reason being is that they use the same harness (and knowing honda they didn't want to make 2 harnesses when there was only 2 differences). The reason the S doesn't use the same harness is because they don't have a lot of the parts that the si's and vtecs do (ie ABS, knock sensor, dual runners, etc).

[SUB[EX] · 02-16-2004, 12:45 PM

true, the S harness is much different.

My negative it also grounded to the block, right under the switch.

red92s · 02-16-2004, 01:07 PM

Quote:

Originally posted by prelude styl
To answer your guys' question-
All Si's are prewired for vtec.

If by "all Si's", you mean "Si's manufactured after 1992", then I guess it might be concievable. . .

Quote:

Originally posted by prelude styl
they don't have a lot of the parts that the si's and vtecs do (ie ABS, knock sensor, dual runners, etc)

The engine harness has nothing to do with ABS, and since when do H23's have vaccum secondary runners?

Preyluder · 02-16-2004, 05:25 PM

What's the difference between vacuum dual runners and say, "normal" dual runners. I thought all h23 had dual intake runners? red92, got a link to post so I can learn about this?

Lucke · 02-18-2004, 02:45 AM

Quote:

Originally posted by prelude styl
To answer your guys' question-
All Si's are prewired for vtec. Reason being is that they use the same harness (and knowing honda they didn't want to make 2 harnesses when there was only 2 differences). The reason the S doesn't use the same harness is because they don't have a lot of the parts that the si's and vtecs do (ie ABS, knock sensor, dual runners, etc).

nope

Quote:

Originally posted by red92s
If by "all Si's", you mean "Si's manufactured after 1992", then I guess it might be concievable. . .

this is true, my 92 Si was not pre-wired for vtec, but i do believe that all 93-96 Si's were.

Preyluder · 02-18-2004, 04:04 PM

^^Vtec wasn't available for Ludes in '92, so wouldn't it make sense NOT to be pre-wired from the factory?

Ft2057 · 03-05-2004, 09:13 PM

If the Si's are prewired for vtec, will the vtec directly bolt on to the h23? (Hopeful thinking....)

4thGenReady2Go · 03-05-2004, 11:22 PM

if you mean putting an H22 head onto a H23 block (ie, making a frankenstein engine), then the scope of your question has reached beyong the limits of this thread, however there is likely a $hit load of information on PO regarding placing an H22 head on an H23, considering a lot of people have done it, but as far as I know, it's not just a 1) remove H23 head 2)replace with H22 head kinda job.

prelude styl · 03-06-2004, 01:22 AM

what in the hell are you guys talking about?!

ALL 92 SI'S ARE PRE WIRED FOR VTEC

H23's have ALWAYS had secondary runners

Geezus, I'm getting tired of stupid people on this board... it's getting far too old and I'm starting to get fed up.

Apparently I just have a mythical 92 Si prewired for vtec and have dual runners... oh, along with thousands of others

Machine Head · 03-06-2004, 10:07 AM

Someones PMS'ing