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> Possible electrical problem?, PROBLEM HAS BEEN SOLVED!!
post Sep 24, 2010 - 5:02 PM
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jordisonjr



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Alright 6gc, I tried using the search, and really couldn't find anything.

My celica is acting really weird.
Whenever I drive it, the revs randomly rise and fall really speradically. Its really inconsistant, and when they go up and down, the whoel car jerks, almost like when someone is lerning to drive 5 speed.
At first I thought it was my clutch slipping on the flywheel, but then my dad checked it out and thought it seemed for electrical.
Then my buddy checked it ou and said it was my distributor and that I should change my cap and rotor.
So I changed my cap and rotor, and its still got the problem.
I really don't know what to do, its my daily driver, and its to the point where it barely drives becasue I don't want to damage anything else.

I took a video on my phone, to give you a better idea of what its doing, I know its real bad quality, but hopefully it'll help.



This post has been edited by jordisonjr: Sep 30, 2011 - 9:37 AM


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1995 Toyota Celica GTS - Daily Driver
1999 Chevy Cavalier - Winter Beater
1994 Honda Civic CX Hatchback - Dead

My Celica!
post Sep 24, 2010 - 5:24 PM
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joesmith94celica...

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I had a consistent drop in revs on my first 94 GT, previous owner had put in splitfire plugs and the electrode on one was so far beyond fouled it was almost no presence of a gap. Replaced the plugs with reg platinum Bosch and the problem went away.
You said it rises on its own though? You recently do anything to the ECU? Does the spring wind on the throttle cable return assembly look loose or crooked?
post Sep 24, 2010 - 5:28 PM
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jordisonjr



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it doesn' really rise. but like if your just driving normal, it will jump up revs like 100 or 200.
Haven't done anything to the ecu and the throttle cable looks to be good.
Do you think bad plugs would cause this?

Thanks for the quick reply btw


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1995 Toyota Celica GTS - Daily Driver
1999 Chevy Cavalier - Winter Beater
1994 Honda Civic CX Hatchback - Dead

My Celica!
post Sep 24, 2010 - 5:31 PM
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joesmith94celica...

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plugs is doubtful for the rise.

wish I could be of more assistance. That is one that I've not experienced a jump in revs while driving. I would be starting at the throttle plate and work my way back from there. Injectors maybe?

I would call Car Talk. You can post the problem on their website and get a reply in about 48-72 hours.
post Sep 24, 2010 - 6:04 PM
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jordisonjr



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Is the near the throttle body? What should I look for? Thanks a lo for the help, I appreciate it


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1995 Toyota Celica GTS - Daily Driver
1999 Chevy Cavalier - Winter Beater
1994 Honda Civic CX Hatchback - Dead

My Celica!
post Sep 24, 2010 - 6:05 PM
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SleekCelica

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ECM.


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1994 Celica GT, coupe, 5 speed.
Front strut brace, cherrybomb glasspack, intake.
post Sep 24, 2010 - 6:22 PM
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mikew04



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I had the same problem, bad grounds. I would sand all of them down and use a tiny bit of dielectric grease for good measure.

This post has been edited by mikew04: Sep 24, 2010 - 6:27 PM


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post Sep 24, 2010 - 7:07 PM
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jordisonjr



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on every single ground on the car?
Sand botch contact points on the ground?


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1995 Toyota Celica GTS - Daily Driver
1999 Chevy Cavalier - Winter Beater
1994 Honda Civic CX Hatchback - Dead

My Celica!
post Sep 24, 2010 - 7:15 PM
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mikew04



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The large grounds in the engine bay... battery to chassis, chassis to engine, etc. (whatever it happens to be, I upgraded mine so I forget what the stock locations are.)
Sand wherever the connection is made. The grease will keep water to prevent corrosion.
It's not bad, just have to take the airbox out to get to the transmission contact point. Hopefully it will solve your problem.


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post Sep 24, 2010 - 7:28 PM
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jordisonjr



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Alright Thanks man ill try it out this weekend.
My car has had a CEL for a while, so I thought to check it out hinking maybe i had something to do with it

So I got a CEL 12, which means, "No G or NE signal is input to the ECUfor 2 secs. or more after STA turns ON"

It said the problem area would be"
• Open or short in NE, G circuit
• Distributor
• Open or short in STA circuit
• ECU

I got This from the guide in the Stickies here: http://www.6gc.net/forums/index.php?act=at...ost&id=1059

I don't really understand any of this, any ideas?


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-Protection mode, For when your amp tries to blow its load.

1995 Toyota Celica GTS - Daily Driver
1999 Chevy Cavalier - Winter Beater
1994 Honda Civic CX Hatchback - Dead

My Celica!
post Sep 24, 2010 - 11:25 PM
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mgnt232



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Im not sure if it would jump up from the bad ground? I know mine were bad when i got the car and itwould bog going around a corner too fast (assuming it moved a little)
And in the winter, my positive connection to my computer (not sure if direct to computer but wasnt the starter wire) was loose, and I could only explain it like someone learning to drive a stick. the power would loose and the gauges went crazy
OH! are the gauges going crazyish? Like do the other ones move at all when this all happens?


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post Sep 25, 2010 - 9:05 AM
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Spider77



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QUOTE (jordisonjr @ Sep 24, 2010 - 7:28 PM) *
Alright Thanks man ill try it out this weekend.
My car has had a CEL for a while, so I thought to check it out hinking maybe i had something to do with it

So I got a CEL 12, which means, "No G or NE signal is input to the ECUfor 2 secs. or more after STA turns ON"

It said the problem area would be"
• Open or short in NE, G circuit
• Distributor
• Open or short in STA circuit
• ECU

I got This from the guide in the Stickies here: http://www.6gc.net/forums/index.php?act=at...ost&id=1059

I don't really understand any of this, any ideas?

It pretty much means you need to take resistance reading from your dizzy. Also, check the air gap. There is also something about checking the harness for shorts. I had this CEL before....and after looking for a dizzy that was reasonable priced (which is hard for a Cali Spec) I decided to ride it out, change my plugs, and advance my timing a bit (which was by accident as I forgot to mark the position of my dizzy) and I have not had a problem since. Not saying this wont work, but It did for me, and I plan on using this as a band aid, cause I really do need a new dizzy.
post Sep 26, 2010 - 12:10 PM
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jordisonjr



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QUOTE (mgnt232 @ Sep 25, 2010 - 12:25 AM) *
Im not sure if it would jump up from the bad ground? I know mine were bad when i got the car and itwould bog going around a corner too fast (assuming it moved a little)
And in the winter, my positive connection to my computer (not sure if direct to computer but wasnt the starter wire) was loose, and I could only explain it like someone learning to drive a stick. the power would loose and the gauges went crazy
OH! are the gauges going crazyish? Like do the other ones move at all when this all happens?

It feels exactly like someone learning to drive stick, and the Tach is the only gauge that does crazy/ like its jumps all around and ****.
That problem was caused by the positive connection with the computer being loose?

QUOTE (Spider77 @ Sep 25, 2010 - 10:05 AM) *
QUOTE (jordisonjr @ Sep 24, 2010 - 7:28 PM) *
Alright Thanks man ill try it out this weekend.
My car has had a CEL for a while, so I thought to check it out hinking maybe i had something to do with it

So I got a CEL 12, which means, "No G or NE signal is input to the ECUfor 2 secs. or more after STA turns ON"

It said the problem area would be"
• Open or short in NE, G circuit
• Distributor
• Open or short in STA circuit
• ECU

I got This from the guide in the Stickies here: http://www.6gc.net/forums/index.php?act=at...ost&id=1059

I don't really understand any of this, any ideas?

It pretty much means you need to take resistance reading from your dizzy. Also, check the air gap. There is also something about checking the harness for shorts. I had this CEL before....and after looking for a dizzy that was reasonable priced (which is hard for a Cali Spec) I decided to ride it out, change my plugs, and advance my timing a bit (which was by accident as I forgot to mark the position of my dizzy) and I have not had a problem since. Not saying this wont work, but It did for me, and I plan on using this as a band aid, cause I really do need a new dizzy.



So My Dizzy is most likely done?
By changing your plugs and advancing your timing it was temporarily fixed? I don't really want to do anything with my timing cause I don't wanna make things worse, and I dno't really know how to do that, but would new plugs help out at all?


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-Protection mode, For when your amp tries to blow its load.

1995 Toyota Celica GTS - Daily Driver
1999 Chevy Cavalier - Winter Beater
1994 Honda Civic CX Hatchback - Dead

My Celica!
post Sep 26, 2010 - 1:17 PM
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jordisonjr



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Alright so I went back, and checked the ecu connections and nothing.
Took it for a ride around my bay, it drove good for about 5 laps and then started acting up again.
When siting in neutral and revving the motor, it also does it.
I took a better video of revvin it while in Neutral, but the jumps weren't as extreme as before but they seem to start jumping around 3000 or so.



At some spots it seems as if the video glitches, but thats atcually the revs jumping.
Each time was a consistant rev, and where it seems like its not, thats the issue.

I really don't know what this could be, cause it seems like it only starts once it is warm, but it also seems like an electrical issue.
Like I said this is my daily driver, so any help is awesome.
thanks guys

This post has been edited by jordisonjr: Sep 26, 2010 - 1:18 PM


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-Protection mode, For when your amp tries to blow its load.

1995 Toyota Celica GTS - Daily Driver
1999 Chevy Cavalier - Winter Beater
1994 Honda Civic CX Hatchback - Dead

My Celica!
post Sep 26, 2010 - 1:46 PM
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Spider77



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Well for me it worked, not saying that its a 100% fix by any means, but I have not had any of the symptoms since. The only way to know for sure if its your dizzy is to take those resistance readings. But to make this easier, here is the text outta the guide.

DTC 12 - RPM SIGNAL (EXCEPT CALIF.)
The distributor assembly contains 3 pick-up coils. The "G" signal informs ECM of the standard crankshaft position. The "NE" signal informs ECM of the crankshaft position and engine speed.
If "NE" signal is not present to ECM within 2 seconds or more with engine cranking, check for open or short in the "G" or "NE" circuit, or for faulty distributor.
If "G" signal is not present from ECM for 3 seconds or more with engine speed of 600-4000 RPM, check for open or short in "STA" circuit or for a faulty ECM.
It also goes on to give a 3 step process on how to check this....
1.)Check resistance of each pickup coils in dizzy...if good go to step 2, if bad replace dizzy housing.
2.)Check for open or short in harness and connector between ECM and Dizzy. If good go to step 3, if bad repair or replace harness/connector
3.)Check air gap. If good check/replace ECM, if bad replace dizzy housing.
And here is a handy pic w/resistance readings


Hope this helps a bit

This post has been edited by Spider77: Sep 26, 2010 - 1:47 PM
post Sep 26, 2010 - 2:41 PM
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jordisonjr



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thanks a lot man, I really don't know what i would do without this website haha.
Im in the process of checking all the grounds while I waitfor my budy with a mulitmeter.


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-Protection mode, For when your amp tries to blow its load.

1995 Toyota Celica GTS - Daily Driver
1999 Chevy Cavalier - Winter Beater
1994 Honda Civic CX Hatchback - Dead

My Celica!
post Sep 26, 2010 - 2:51 PM
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Spider77



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Hey, NP, I know how it is to have a DD that needs to run with minimal problems. Hope the pic helps out! I had a problem getting readings, as it was real hard to see the male ends to put the leads on. But I was alone, with a buddy and a mirror you should be able to do it without removing the dizzy!

This post has been edited by Spider77: Sep 26, 2010 - 2:54 PM
post Sep 26, 2010 - 5:40 PM
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jordisonjr



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unfortunately Im still waiting for my buddy to come over. Its been a few hours now.
Gotta love waiting for people ..


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-Protection mode, For when your amp tries to blow its load.

1995 Toyota Celica GTS - Daily Driver
1999 Chevy Cavalier - Winter Beater
1994 Honda Civic CX Hatchback - Dead

My Celica!
post Sep 30, 2010 - 5:53 PM
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stephen_lee



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its more than likely your dizzy.


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"And, as always, your friendship, help, and dedication to the advancement of Texas Celica dominance is GREATLY appreciated. Thanks bro." -DEATH

1994 GT: V6 swap, 5speed E53 W/ LSD, All Power, now RED
1995 ST: SOLD @273k miles, Auto, all power, CarPC, White
1994 ST: Totaled, 5spd, all power, Red RIP 07/09/09 @ 241,810
1994 Lexus LS400: This is my new DD
post Sep 30, 2010 - 10:30 PM
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jordisonjr



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yea, due to unreliable friends, and my very minimal mechanical skills, Im waiting for my mechanic to come ove ron monday to check it out.
Im geting my wisdom teeth yanked tomorrow so Ill be out for most of the weekend anyways.


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-Protection mode, For when your amp tries to blow its load.

1995 Toyota Celica GTS - Daily Driver
1999 Chevy Cavalier - Winter Beater
1994 Honda Civic CX Hatchback - Dead

My Celica!

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