'90 Civic/GS-R swap - Bad transmission ground and now spark problem

Thread Tools
 
Search this Thread
 
Old Nov 13, 2012 | 10:15 AM
  #1  
thundernoodle's Avatar
Thread Starter
Honda-Tech Member
 
Joined: Jul 2008
Posts: 1,261
Likes: 0
From: St. Paul, MN
Default '90 Civic/GS-R swap - Bad transmission ground and now spark problem

When I go to start the car and I complete the circuit to the starter the clutch line gets extremely hot. I can't find any wires exposed on it but would it be a lack of ground? If this is so why can I not ground the battery to the trans housing and solve the problem?
Reply
Old Nov 13, 2012 | 03:26 PM
  #2  
fcm's Avatar
fcm
Old Fart
 
Joined: May 2004
Posts: 26,173
Likes: 18
From: kelowna, bc, canada
Default Re: Clutch line hot

You definatly have a grounding problem.

MM&Y of car would help.

Check/redo the main grounds, batt. post and cable clamp, batt. to chassis ground and chassis to engine ground, DO NOT just eyeball the connections, disconnect/clean/reconnect.

A ground connection can look perfectly good, even be tight, but still have little or no continuity, redo them. 94
Reply
Old Nov 13, 2012 | 03:50 PM
  #3  
thundernoodle's Avatar
Thread Starter
Honda-Tech Member
 
Joined: Jul 2008
Posts: 1,261
Likes: 0
From: St. Paul, MN
Default Re: Clutch line hot

90 civic DX with a GSR swap. Will this cause a no spark/ weak starter issue? I re-sanded the t-stat, valve cover ground. I had no trans ground so I added one off of a bracket. I had the battery grounded off the chassis and housing (its a 1 piece ground from the terminal to the chassis to the end) but it seemed like the car was shorting out. Strange.
Reply
Old Nov 14, 2012 | 04:46 AM
  #4  
thundernoodle's Avatar
Thread Starter
Honda-Tech Member
 
Joined: Jul 2008
Posts: 1,261
Likes: 0
From: St. Paul, MN
Default Re: Clutch line hot

So it only heats when I crank the starter over. When its just "on" and all the lights are on nothing happens but when I send voltage through the starter it heats the line up. Could it be a bad starter ground? Its a new starter, Im going to try a known good starter.
Reply
Old Nov 14, 2012 | 05:24 AM
  #5  
fcm's Avatar
fcm
Old Fart
 
Joined: May 2004
Posts: 26,173
Likes: 18
From: kelowna, bc, canada
Default Re: Clutch line hot

The starter grounds through it's case to the transaxel, even if there was a problem with the starter, it should not "heat up" the clutch line.

The clutch line is acting like a ground path, it would only do that if the engine ground was bad or inadequate or somehow power was being supplied to it.

BTW is it cable or hydro?

You said it is a one piece ground cable, from batt. to chassis to "end", where is the chassis ground and where is the "end" conneted to, what bracket, where? 94
Reply
Old Nov 14, 2012 | 06:59 AM
  #6  
thundernoodle's Avatar
Thread Starter
Honda-Tech Member
 
Joined: Jul 2008
Posts: 1,261
Likes: 0
From: St. Paul, MN
Default Re: Clutch line hot

Its hydro converted. I made sure there was no wires grounding out. I have a ground on the valve cover, thermo and trans. The one piece goes from the neg terminal to a bolt on the passenger frame rail but it continues as a regular ground. I had it bolted to the trans but it seemed to make a short.
Reply
Old Nov 14, 2012 | 11:19 AM
  #7  
thundernoodle's Avatar
Thread Starter
Honda-Tech Member
 
Joined: Jul 2008
Posts: 1,261
Likes: 0
From: St. Paul, MN
Default Re: Clutch line hot

Car was auto now manual
Reply
Old Nov 14, 2012 | 11:31 AM
  #8  
thundernoodle's Avatar
Thread Starter
Honda-Tech Member
 
Joined: Jul 2008
Posts: 1,261
Likes: 0
From: St. Paul, MN
Default Re: Clutch line hot

I also sanded all the grounds, the T-stat, valve cover, batt to chassis, batt terminals.
Reply
Old Nov 14, 2012 | 11:32 AM
  #9  
fcm's Avatar
fcm
Old Fart
 
Joined: May 2004
Posts: 26,173
Likes: 18
From: kelowna, bc, canada
Default Re: Clutch line hot

A lot of Honda/Acura use the "one piece" ground cable, from batt. to chassis, [frame rail] to engine, [transmission] it should work fine,

You said, "I had it bolted to the trans but it seemed to make a short" where is it connected now? 94

Last edited by fcm; Nov 14, 2012 at 11:32 AM. Reason: typo
Reply
Old Nov 14, 2012 | 11:34 AM
  #10  
thundernoodle's Avatar
Thread Starter
Honda-Tech Member
 
Joined: Jul 2008
Posts: 1,261
Likes: 0
From: St. Paul, MN
Default Re: Clutch line hot

I bolted the end back to the chassis. there is a bolt in the middle as well that I cleaned off.
Reply
Old Nov 14, 2012 | 11:36 AM
  #11  
thundernoodle's Avatar
Thread Starter
Honda-Tech Member
 
Joined: Jul 2008
Posts: 1,261
Likes: 0
From: St. Paul, MN
Default Re: Clutch line hot

Tried a known good starter and it did the same thing.
Reply
Old Nov 15, 2012 | 05:37 AM
  #12  
thundernoodle's Avatar
Thread Starter
Honda-Tech Member
 
Joined: Jul 2008
Posts: 1,261
Likes: 0
From: St. Paul, MN
Default Re: Clutch line hot, Electrical Issue? '90 Civic with GS-R swap

bump
Reply
Old Nov 15, 2012 | 07:53 AM
  #13  
BIGef's Avatar
Honda-Tech Member
 
Joined: Oct 2011
Posts: 460
Likes: 0
Default Re: Clutch line hot, Electrical Issue? '90 Civic with GS-R swap

Happen to me before,
auto to manual but no hydro.

Everytime i tried to start it the wires get hot.
I can see smoke on the wires.

It was definitely grounding somewhere.
Found out one my wires leads going to the starter was grounding.

Double check nothing is touching metal.

Hope this helps
Reply
Old Nov 15, 2012 | 04:27 PM
  #14  
fcm's Avatar
fcm
Old Fart
 
Joined: May 2004
Posts: 26,173
Likes: 18
From: kelowna, bc, canada
Default Re: Clutch line hot

Originally Posted by thundernoodle
I bolted the end back to the chassis. there is a bolt in the middle as well that I cleaned off.
The "end" can not be on the chassis, it must be on the engine/transmission or the engine does not have a proper ground and it will "seek" a ground from where it can.

As I said, on a G2 the one piece ground cable goes from the batt. to the chassis, under the batt. and then continues to the engine where the "end" is connected to ground the engine.

Name:  msshMlC5SZLcQ1qzZDX8aIg.jpg
Views: 23282
Size:  6.5 KB94
Reply
Old Nov 18, 2012 | 06:48 AM
  #15  
thundernoodle's Avatar
Thread Starter
Honda-Tech Member
 
Joined: Jul 2008
Posts: 1,261
Likes: 0
From: St. Paul, MN
Default Re: Clutch line hot, Electrical Issue? '90 Civic with GS-R swap

Fixed it. It was the combination of grounds. Still dont have spark though. tested the ICM and coil. they work fine on my integra and so dont the wires. Tested the Ignition switch for continuity and it works in all positions. The thermo ground is good. So it must be either a break in the black/yellow wire or the ecu is bad right?
Reply
Old Nov 18, 2012 | 10:56 AM
  #16  
fcm's Avatar
fcm
Old Fart
 
Joined: May 2004
Posts: 26,173
Likes: 18
From: kelowna, bc, canada
Default Re: Clutch line hot, Electrical Issue? '90 Civic with GS-R swap

Is there power on the black/yellow at the distributor assembly when the ign. switch is in BOTH the run and start positions?

Check for power at IGP1 and IGP2 at the ECU/ECM. 94
Reply
Old Nov 19, 2012 | 06:56 AM
  #17  
thundernoodle's Avatar
Thread Starter
Honda-Tech Member
 
Joined: Jul 2008
Posts: 1,261
Likes: 0
From: St. Paul, MN
Default Re: Clutch line hot, Electrical Issue? '90 Civic with GS-R swap

Tested the Black/yellow for continuity at the dizzy and shock tower connections and got nothing. Tested pin A25 (OBD1 ECU) and still got nothing. The ECU is a Phearable unit but it works in a friends car. Im running it with an HAmotorsports OBD0-OBD1 jumper.
Reply
Old Nov 19, 2012 | 11:17 AM
  #18  
fcm's Avatar
fcm
Old Fart
 
Joined: May 2004
Posts: 26,173
Likes: 18
From: kelowna, bc, canada
Default Re: Clutch line hot, Electrical Issue? '90 Civic with GS-R swap

Test for power, [not continuity] on the black/yellow at the distributor assembly.

It needs to have power, [12V+] when ign. switch is in both the run and start positions, if not, you will not have spark. 94
Reply
Old Nov 19, 2012 | 12:22 PM
  #19  
thundernoodle's Avatar
Thread Starter
Honda-Tech Member
 
Joined: Jul 2008
Posts: 1,261
Likes: 0
From: St. Paul, MN
Default Re: Clutch line hot, Electrical Issue? '90 Civic with GS-R swap

Ok 12.38 volts at the dizzy plug. Now on an OBD2 dizzy the yellow/green is the ignitor right? I only got 5 volts there. I had 2 same size white wires on the OBD0 harness could I have miss wired the ignitor?
Reply
Old Nov 20, 2012 | 09:03 AM
  #20  
thundernoodle's Avatar
Thread Starter
Honda-Tech Member
 
Joined: Jul 2008
Posts: 1,261
Likes: 0
From: St. Paul, MN
Default Re: Clutch line hot, Electrical Issue? '90 Civic with GS-R swap

yellow/green and black/yellow wire seem to be getting 9-12 volts. Still no spark. Timing belt is fine and on the correct time. Dizzy and wires work in my 01 ITR. Why no spark? I want this nightmare to end.
Reply
Old Nov 20, 2012 | 11:02 AM
  #21  
fcm's Avatar
fcm
Old Fart
 
Joined: May 2004
Posts: 26,173
Likes: 18
From: kelowna, bc, canada
Default Re: Clutch line hot, Electrical Issue? '90 Civic with GS-R swap

Did you check for power at IGP1 and IGP2 at the ECU/ECM? 94

Last edited by fcm; Nov 20, 2012 at 11:03 AM. Reason: typo
Reply
Old Nov 21, 2012 | 04:21 PM
  #22  
thundernoodle's Avatar
Thread Starter
Honda-Tech Member
 
Joined: Jul 2008
Posts: 1,261
Likes: 0
From: St. Paul, MN
Default Re: Clutch line hot, Electrical Issue? '90 Civic with GS-R swap

12 volts at both sources in both key positions (on2 and on3).
Reply
Old Nov 22, 2012 | 05:56 AM
  #23  
fcm's Avatar
fcm
Old Fart
 
Joined: May 2004
Posts: 26,173
Likes: 18
From: kelowna, bc, canada
Default Re: Clutch line hot, Electrical Issue? '90 Civic with GS-R swap

Have you tried to pull trouble codes?

Do you have a 12V test light? 94
Reply
Old Nov 22, 2012 | 06:34 AM
  #24  
thundernoodle's Avatar
Thread Starter
Honda-Tech Member
 
Joined: Jul 2008
Posts: 1,261
Likes: 0
From: St. Paul, MN
Default Re: Clutch line hot, Electrical Issue? '90 Civic with GS-R swap

No codes. And yes.
Reply
Old Nov 22, 2012 | 08:42 AM
  #25  
thundernoodle's Avatar
Thread Starter
Honda-Tech Member
 
Joined: Jul 2008
Posts: 1,261
Likes: 0
From: St. Paul, MN
Default Re: Clutch line hot, Electrical Issue? '90 Civic with GS-R swap

With the dizzy and wires working in another car and the ecu working as well it would mean that the harness has a problem some where right? I've tested the ignition switch and it was good. Im just not getting spark from the coil. I tried to see if it would spark right off the coil when cranking but it didn't. Still had 11.8 volts but it wouldn't jump off the coil for some reason.
Reply



All times are GMT -8. The time now is 09:56 AM.