I finally did it, after a year I swapped my auto transmission to 5spd

Finally getting the hang of it, but one problem

vtec wont engage! the oil level is good and I was driving for a good half hour and it still wouldn't do it! I dont know whats going on, I still have the auto computer so could it be that? what is the manual computer called?

 

Speedo working? (VSS)

 

Is the Check engine light on???

 

it def isnt the computer. mine is auto - 5 speed swapped too, but i still have the stock ECU.

something not connected right?

and FERN, the check engine light will be on simply because of the swap.

 

the check engine light is on but he said its just cause of the swap.

I can make sure everything is plugged in correctly, what would be disconnected that would stop it from working?

 

get the code

 

I will when I get the chance tomorrow, you think its something besides just the manual swap throwing codes?

 

change your "vtech" fluid

 

last time i checked "VTECH" as you call it, uses the motor oil from the engine

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bowser_cd5 &raquo;</TD></TR><TR><TD CLASS="quote">change your "vtech" fluid</TD></TR></TABLE>

i'm thinking (and hoping) that was just a joke.

check and see which code(s) you are throwing. If the CEL is on, there could be one code or 5, you never know. make sure it's just the one for the tranny.

 

called the shop today, he said its because its not the 5spd ecu. whats the 5spd ecu called so i can get it myself and install it, cause he is quoting me around $250 for computer with labor.

 

it man, it definitely isnt the ECU. Mine is a swapped 5-speed from auto. if you want the CEL to go away, get a new ECU, but i doubt it will fix your lack of vtec.

i have the stock auto ECU, but i still get my vtec at 5.5k.

*shruG*

ill ask someone

 

check ur vss

 

when you swap your auto out, did they reflash a new manual ecu for your car? if not you will throw engine check due to the auto ecu and the tcm. By throwing the cel it would put you in limp mode causing your vtec not to engage. You would either have to get your auto ecu rechipped or get a manual ecu that you can reflash. That would be one cause of vtec not working. Second would be you vss, (speed sensor located on top of your tranny) depending on the type of tranny that was put in you will have to make sure that it is a h22a vss if not there will be no vtec at all. I had a h23 swap into my car, but i needed a h22 vss due to the motor/ecu, because of that i had no vtec at all. Good luck hopefully you this would help you.

PS i do have a auto rechipped manual ecu for sale as well as a vss

edit this issue is for 4th or 5th gen?


Modified by ludeboi121 at 10:35 PM 10/31/2007

 

heres the codes i got

Transmission Control system malfunction

Manufacturer controlled transmission

shift solenoid a

shift solenoid c

any of these affect vtec engaging? or is there a wire unplugged somewhere that i can plug back in?

this is for a 5th gen

the speedo does work, it appears to be accurate

 

those all look like tranny codes.....i doubt those would have anything to do with vtec not engaging UNLESS any of those codes would cause the ECU to go into limp mode.

 

Not all CEL's would cause your car to go into limp mode. Don't know why dude man was saying you have to re-flash your ECU to go from auto-&gt;manual. Afaik you just have to open up your ecu and re-solder one of the connection points on the ECU.

I would be fairly certain your tranny/ecu combo is screwing with your ECU and not letting VTEC engage. Do this mod, and I think you would be fine.

https://honda-tech.com/zerothread?id=1275452

 

Make sure the ground wire terminal by the thermostat is connected. That's the ground junction point for the vtec solenoid and other components.

 

I will be sure to try that and keep you guys posted. wish me luck!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JT &raquo;</TD></TR><TR><TD CLASS="quote">Make sure the ground wire terminal by the thermostat is connected. That's the ground junction point for the vtec solenoid and other components. </TD></TR></TABLE>

the car wouldn't even start if that was loose....it grounds the ecu too.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 94Vtecluder &raquo;</TD></TR><TR><TD CLASS="quote">Not all CEL's would cause your car to go into limp mode. Don't know why dude man was saying you have to re-flash your ECU to go from auto-&gt;manual. Afaik you just have to open up your ecu and re-solder one of the connection points on the ECU.

I would be fairly certain your tranny/ecu combo is screwing with your ECU and not letting VTEC engage. Do this mod, and I think you would be fine.

https://honda-tech.com/zerothread?id=1275452</TD></TR></TABLE>

i was only stating that he would need a reflash if he swaps to a manual ecu; other than that i have stated that he can rechip his auto to work for the 5spd. And yes i have done a tranny swap on my lude, and the ecu check codes did indeed put me in limp mode causing my vtec to not engage, but it could be for difference reason, still in the open pretty much. But thats one thing he can get rid of first is fixing the CELs.

Since your lude is freshly swapped, there is a tcm computer right next to the ecu, you can just unplug that and reset the ecu to clear the tcm cel. The rest of the code is due to the ecu. Theres a chip in the auto ecu that you will need to desolder and resolder, or your next bet is to get a manual ecu and have honda reflash it. All those code is due to the auto tranny being missing now and your ecu is trying to find it. I had the same code for my swap for a 5th gen.

 

ok so here are the things im going to try:

1. unplug the thing next to the computer and plug back in

if that doesnt work

2. re solder the place in the link above

if that doesnt work

3. but a new ecu

 

no you will need to unplug the thing next to the ecu and remove it completely, it is no use anymore. its only for the auto tranny. And you will need to resolder the resistor chip. You will need to do both to remove all the CELs listed. Buying a manual ecu isnt necessary unless you mess up soldering the ecu. have fun!

 

Thanks alot guys!! It worked!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Addicted2Vtec &raquo;</TD></TR><TR><TD CLASS="quote">Thanks alot guys!! It worked!</TD></TR></TABLE>

Did you have to re-solder too?