Honda Prelude Forum
 
Go Back   Honda Prelude Forum > Tech-Talk > General Tech Talk

Thread Title
H23A VTEC swap shifting problem, CEL, FLASHING D4

 
Reply
 
LinkBack Thread Tools Display Modes
  #1 (permalink)  
Old 05-13-2011, 07:55 PM
TheLudeDude's Avatar
Silver Member
 
Join Date: May 2010
Location: FL
Posts: 269
iTrader: (0)
TheLudeDude has a reputation beyond reputeTheLudeDude has a reputation beyond reputeTheLudeDude has a reputation beyond reputeTheLudeDude has a reputation beyond reputeTheLudeDude has a reputation beyond reputeTheLudeDude has a reputation beyond reputeTheLudeDude has a reputation beyond reputeTheLudeDude has a reputation beyond reputeTheLudeDude has a reputation beyond reputeTheLudeDude has a reputation beyond reputeTheLudeDude has a reputation beyond repute
Icon9 H23A VTEC swap shifting problem, CEL, FLASHING D4

I just did the H23A swap, the dohc vtec h23 "blue top" and had the most fun with this swap *sarcasm*. Anyway, I have an automatic H22 Transmission bolted on, along with the H22 Auto Trans TCU for the transmission "Computer located next to ECU", and the car drives, but in a certain way...

Problem 1: when i turn the car into the on position, the D4 light is flashing on the speedo.

Problem 2: when i start the car up, I can't shift down into reverse or anything, basically like the shifter is locked "I think because the D4 light is flashing". What I have to do to get the car to move at all is put the key in the shift release, and put it in neutral, then start the car, and shift to reverse or drive from neutral.

Problem 3: when i shift from neutral to D4 when the car's running, i have to give it a lot of gas to just barely get the car to move forward, to have a normal'ish take off, i shift down into D2 so it takes off faster in lower gear.

Problem 4: The reason I shift down into D2, is because D1 isn't engaging. I mean, i can be at a complete stop and shift into D1 and accelerate forward, but my mechanic said either way it's in D2. because we tested it by going 20 while in D2, and shifted down to D1, but it didn't even shift down.

Problem 5: we wired up the vtec wires, idk if he did it right or not, but it won't engage, i'm thinking because the transmission is giving us issues, and won't engage vtec cause the tranny isn't running the rpms right or something. my mechanic counted the flashes on the CEL test, and he said he got a code for vtec.

We changed the solenoids on the transmission, and put my F22 tranny solenoids on the H22 tranny, just to see if they were the problem, but it changed nothing.
On the other hand, when we put the F22 automatic transmission computer back in, i could start the car, and shift down into reverse and drive and all, but it still has a flashing D4, and all the other problems listed still remain.

My guess is it's either the ECU is tuned wrong, "It's a P72 chipped and tuned for this engine" but maybe the guy tuned it wrong, or maybe the TCU for the H22 tranny is bad?
My mechanic thinks that the whole transmission is bad, and we should take it back and get a different h22 auto tranny.

PLEASE TELL ME WHAT YOU THINK.
I need this car for work, and this is making me miss work lately..
__________________
__________________________________________________

1st: (93 Prelude) F22a1 to H23a JDM Blue Top - STOLEN
2nd: (95 Prelude) F20b - SOLD
3rd: (99 Civic, what a mistake) D16y8 - SOLD
4th: (94 Prelude) H23a1 to ?????? - CURRENT
__________________________________________________


Quote:
Originally Posted by M0B5TA View Post
in soviet Russia, prelude hates you
Reply With Quote
  #2 (permalink)  
Old 05-13-2011, 08:10 PM
TheLudeDude's Avatar
Silver Member
 
Join Date: May 2010
Location: FL
Posts: 269
iTrader: (0)
TheLudeDude has a reputation beyond reputeTheLudeDude has a reputation beyond reputeTheLudeDude has a reputation beyond reputeTheLudeDude has a reputation beyond reputeTheLudeDude has a reputation beyond reputeTheLudeDude has a reputation beyond reputeTheLudeDude has a reputation beyond reputeTheLudeDude has a reputation beyond reputeTheLudeDude has a reputation beyond reputeTheLudeDude has a reputation beyond reputeTheLudeDude has a reputation beyond repute
Re: H23A VTEC swap shifting problem, CEL, FLASHING D4

Just found this on Honda tech, to add to the possibilities of what the problem may be.



As many of you are aware, early 90's Accords regularly have transmission shifting problems (eg. S light flashing or on steady, D4 light flashing, trans takes off in 2nd gear). The most common cause of this is a burnt out TCM.
I have been rebuilding these computers for quite some time now and have some in stock ready for shipping, or I can rebuild yours.
For pricing, or more information, please email me at: cmrvi1@yahoo.com

Below is some info on how to check for codes, TCM location, and most IMPORTANTLY, how to check your TCM.


Behind the right hand corner of the dash on the passenger's side (just below the glove compartment) you will find 2 connectors taped to the wire harness with blue tape ( unless someone previously removed the tape). One is a three wire connector (data link connector) the other is a two wire connector. By jumping the two wires on this connector, you check for engine and transmission codes.
With the ignition switch off, connect the two wires together. Have a pen and paper handy. Turn the ignition switch on. The S light (or D4 light if your car doesn't have the S light) should start to flash a code. Might be a combination of long and short flashes. A long flash stands for 10, and short flashes are 1. For example, if the light blinks: long-short-short-short, then that is a code 13. When you find out what code it is, post it and I can tell you what is going on. BTW, 90-93 Accords have a bad habit of burning out the trans computers. So sometimes you won't get a code. The light will just stay on steady when you jump the connector.
If the light doesn't blink when you jump the connector, then your TCM (transmission control module) might be bad.
To verify this, remove the TCM ( it's located under the rug on the passenger side bolted to the firewall). You will find two modules bolted to one bracket. The TCM is the smaller of the two, on the right.
To remove it, you'll need to remove the 4 bolts securing the bracket. Then, unplug both computer modules, and gently remove the bracket.
Next, unbolt the TCM from the bracket.
Remove the four screws that hold on the cover.
Look at the board carefully. If it is bad, you will find a burnt out resistor and a leaking capacitor. Again, LOOK CAREFULLY. Yours might not be this bad. Sometimes just one of the resistors will overheat and turn dark brown. If this is the case, I can rebuild it for you.
Email at cmrvi1@yahoo.com and I'll give you more details.
__________________
__________________________________________________

1st: (93 Prelude) F22a1 to H23a JDM Blue Top - STOLEN
2nd: (95 Prelude) F20b - SOLD
3rd: (99 Civic, what a mistake) D16y8 - SOLD
4th: (94 Prelude) H23a1 to ?????? - CURRENT
__________________________________________________


Quote:
Originally Posted by M0B5TA View Post
in soviet Russia, prelude hates you
Reply With Quote
Reply

Tags
auto trans stuck in d2, d4 flashing


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
honda prelude h23a non vtec swaping for a f20b vtec need help lude85 4th Gen Honda Prelude 4 09-08-2012 01:12 AM
Shifting Problem Rob357 5th Gen Honda Prelude 10 04-17-2010 11:38 PM
H23A VTEC swap w/ A/T questions. MountainDrew 4th Gen Honda Prelude 3 11-15-2009 12:08 AM
Shifting Problem UntoTheCruel General Tech Talk 7 09-23-2009 03:29 AM
Shifting problem... 92lude09 4th Gen Honda Prelude 17 08-09-2009 10:53 PM


All times are GMT -4. The time now is 05:49 AM.



Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
LinkBacks Enabled by vBSEO 3.6.0 PL2 © 2011, Crawlability, Inc.
vB.Sponsors


Copyright © 2006-2009 PreludeZone.com All Rights Reserved.