Could changing ignition timing affect the transmission?

[AbsurdNY]

I was playing around with my ignition timing yesterday and i retarded it a little bit. All the sudden today, my sport shift light comes on and I have no power in D4. I put my timing back to stock and reset the ECU and the car shifts normal again. I just want to know if timing would affect the transmission like this or if something else could be going wrong? I tried to pull the TCU code when the shift light was on but it did not give me one. I did notice that the red light on the TCU was lit solid but after I pulled the ECU fuse and the sport shift light went off, the red TCU light blinks now. All help appreciated.

[AbsurdNY]

No one has any idea?

Edit* Just drove my CB7 to the store and the dame sports shift light is on again. In D4 it has no power at all. If I shift the car manually it has power in D1 but D2 has no power and also when I shift out of D2 to D3 or D4 it does not seems like it comes out of second gear! I guess this is limp mode? I'm thinking that either my TCU might be going bad and I also have heard that a ignition switch could actually cause this problem. I will have to try to pull the TCU code again tomorrow and hopefully it gives me one.

[wed3k]

it could be two seperate problems. are you jumping the service connector while adjusting the ignition timing?

[AbsurdNY]

it could be two seperate problems. are you jumping the service connector while adjusting the ignition timing?

I did not jump the service connector because I did not use a timing light. I just marked the factory spot and then moved the dizzy a hair. I put that back on the factory spot the other day though.

The trans probably has to be completely unrelated. I did some research last night and I think it could be my TCU. I know someone with a CB7 and he is going to come over later and we are going to try switching TCU's.

[dano28]

I did not jump the service connector because I did not use a timing light. I just marked the factory spot and then moved the dizzy a hair. I put that back on the factory spot the other day though.

Huh?? You can't do that.

[CAMILOSI]

I Remember When I Had My Other Cb,i Use To Unplug The Tcu For A Few Seconds When It Was Acting Up And Replug And It Work Fine For A Good Four Months.it's Like Resetting It.but In My Case I Needed One Tcu,it Was Only Temp Repair.u Could Try It And See.

[AbsurdNY]

Huh?? You can't do that.

What the hell are you talking about? I can't do what? Your trying to say I can't change the ignition timing without a timing light? Your wrong. And using the service connector is just when you use a timing light so the ECU don't affect the reading.

I Remember When I Had My Other Cb,i Use To Unplug The Tcu For A Few Seconds When It Was Acting Up And Replug And It Work Fine For A Good Four Months.it's Like Resetting It.but In My Case I Needed One Tcu,it Was Only Temp Repair.u Could Try It And See.

Yea that does fix it for a little while but something puts it back into limp mode again. I'm trying to figure it out right now

[wed3k]

actually you have to jump the service connector. ive had bad experiences trying to do it without the service connector jumped. it just doesnt work, the ecu re-corrects.

[AbsurdNY]

actually you have to jump the service connector. ive had bad experiences trying to do it without the service connector jumped. it just doesnt work, the ecu re-corrects.

Hmm I'm not sure. I have moved the timing around in the past without the service connector jumped with no problems at all. I guess it really wouldn't hurt just to jump it anyway.

I just got back from the store and once again, my sports light is on. I noticed that my autoshifter is making a clicking noise at the same time the sports light blinks like the shift lock is going on and off like when you step on the brake. I shut my heat off so I could hear better and I hear a relay clicking noise coming from under/in the dash on the left side of the steering wheel. This clicking only clicks when the sport light blinks and the shifter makes that clicking noise. It seems to only do it when its in park.

[HondaFan81]

Seems like a grounding issue.

[Reignstarz]

Nah you don't have a grounding issue and retarding would not cause this. Unless you took out your distributor which I highly doubt you did.

I had/have this issue at the moment. Basically, When I changed my distrib my firing order was off(You didn't do this) so I got that straight and got my rpms right and such.


What you are experiencing is a Speed Sensor Issue.

http://ebay-img.1aauto.com/TRS/1ATRS00001.jpg (I don't know if sending links is allowed I apologize if its not im not trying to sell anything lol)

It's located on the top of the transmission kinda near the fire wall. You need an extension and I want to say it's a 10 maybe 9-11 mm.

2 bolts 10 mm hold it on and there is a spindle(little stick like thing cant think of the word right now) and a connector.

Easy take out and easy put it(Unless you have the thing that hold sthe connector than it's kinda a pain).

But the flashing sports light is caused by this. I don't know if you have modded ride or anything. But give it a try and replace it, Fixed mine.

Although mine does go haywires sometimes when it's cold. But i think it's because I have 1 bolt on it atm lol.

-Reign

[AbsurdNY]

Nah you don't have a grounding issue and retarding would not cause this. Unless you took out your distributor which I highly doubt you did.

I had/have this issue at the moment. Basically, When I changed my distrib my firing order was off(You didn't do this) so I got that straight and got my rpms right and such.


What you are experiencing is a Speed Sensor Issue.

http://ebay-img.1aauto.com/TRS/1ATRS00001.jpg (I don't know if sending links is allowed I apologize if its not im not trying to sell anything lol)

It's located on the top of the transmission kinda near the fire wall. You need an extension and I want to say it's a 10 maybe 9-11 mm.

2 bolts 10 mm hold it on and there is a spindle(little stick like thing cant think of the word right now) and a connector.

Easy take out and easy put it(Unless you have the thing that hold sthe connector than it's kinda a pain).

But the flashing sports light is caused by this. I don't know if you have modded ride or anything. But give it a try and replace it, Fixed mine.

Although mine does go haywires sometimes when it's cold. But i think it's because I have 1 bolt on it atm lol.

-Reign

I'm not sure if it is the VSS. Wouldn't I get a CEL if it was? The sports light blinks sometimes when I start the car but it is mostly lit solid. Also the red light on the TCU is lit. I'm going to check all my grounds tomorrow and then check the resistance on the shift solenoids.

[deevergote]

The dizzy should not affect the TCU.
You can mark the dizzy and move it, then return it back to that mark and your timing will be on, or at least close enough. I have no marks on my flywheel, so I have to rely on a mark that cpmike and I had the foresight to create.

A grounding issue is certainly a possibility, as the weirdest of things can happen.

The first thing to check is the TCU though. See if there are any codes. If not, try resetting everything (pull the battery cables for a few minutes) and see if that helps.

[Reignstarz]

Okay I know what you're problem is now.

It's not a ground.

I should of just read your posts a little more sorry about that. I just thought you had a flashing s light problem lol.


89-93 hondas have a capacitor problem in the tcu, The way I figured this out is because I changed my tcu out of my 90 and took the tcu out of me 91 f22a4. I then took my tcu apart and was going to rebuild it :O. But I notice the capacitors were fried.

The capacitors basically leak and cause the car to not get out of second gear. If you take the battery out or reset the tcu like you did you can drive it norm until it butt rapes you again..

I saw on ebay a f22a6 tcu for 15 bucks 15 for shipping. Change out the tcu and your problem is gone.

The sports like comes on to tell you there is a transmission problem. You couldn't snag the code but that is your problem.

No ground. Just change your tcu =]

[deevergote]

Good to know. Bad TCU was my first thought... but it's nice to have an idea as to WHY they go bad (I've never actually even driven an automatic CB7, so anything I know is from reading on here)