DS-MAP

Grounding locations

Grounding locations
« on: January 28, 2011, 12:58:59 AM »
1990 style throttle body ground



1991+ style throttle body ground



Better view of 91+ strap.

AMP 2 Corinthians 8:21
For we take thought beforehand and aim to be honest and absolutely above suspicion, not only in the sight of the Lord but also in the sight of men.


citymunky

  • *
  • 84
    • Galant VR-4
    • 1991
    • Head: 1G (large ports)
    • Motor: 4G63 2.0L
    • Turbo: TD05H-20
Re: Grounding locations
« Reply #1 on: January 28, 2011, 08:42:20 AM »
What is being grounded to Throttle Body?
'91 Galant VR-4 (1505/2000). Fresh TD05H-20G, JE Pistons/ Crower rods/ HKS 272 Cams/1g head/1g Non-Turbo throttle body/Cyclone intake manifold/FP exhaust manifold/Victory Performance 2.5" o2 housing/Tial 40mm WG w/ open dump/Pacesetter 1g 3" downpipe/3" hollow high flow cat/3" catback/

Re: Grounding locations
« Reply #2 on: January 28, 2011, 10:46:02 AM »
What is being grounded to Throttle Body?

I'm not sure, more block grounding ?
AMP 2 Corinthians 8:21
For we take thought beforehand and aim to be honest and absolutely above suspicion, not only in the sight of the Lord but also in the sight of men.


red97rum

  • *
  • 235
    • Talon TSI AWD
    • 1992
    • Head: 1G (large ports)
    • Motor: 4G63 2.0L
    • Turbo: Borg Warn
Re: Grounding locations
« Reply #3 on: January 28, 2011, 12:18:55 PM »
What is being grounded to Throttle Body?

It's for the closed throttle switch/idle switch I think.  For some reason the bolts that go through the throttle body to the intake manifold do not always provide a ground.  I was having issues with going pig rich during decel and with the car stalling when I rolled to stop signs.  Symptoms of a failing closed throttle switch and when i tested mine, low and behold, it wasn't working.  I was missing the throttle body ground and using a 12v test the TB was not providing a ground.  Once I fixed the TB ground the closed throttle switch worked, the car would cut fuel on decel and it fixed most (cams and lack of isc don't help) of my stalling issues when stopping.
Auto Swapped
[email protected] in the 1/8th

steve

  • **
  • 7
    • Eclipse GSX
    • 1991
    • Head: 1G (large ports)
    • Motor: 4G63 2.0L
    • Turbo: FP b16g
Re: Grounding locations
« Reply #4 on: January 29, 2011, 07:39:03 AM »
What is being grounded to Throttle Body?

The idle position switch. It needs a solid ground so it can ground the green wire from the ECU when the throttle is closed.

citymunky

  • *
  • 84
    • Galant VR-4
    • 1991
    • Head: 1G (large ports)
    • Motor: 4G63 2.0L
    • Turbo: TD05H-20
Re: Grounding locations
« Reply #5 on: January 29, 2011, 09:16:17 AM »
ok. I don't think I have a ground on my '90 Non-turbo TB. I also don't have a ICS, so maybe I should look into it.
'91 Galant VR-4 (1505/2000). Fresh TD05H-20G, JE Pistons/ Crower rods/ HKS 272 Cams/1g head/1g Non-Turbo throttle body/Cyclone intake manifold/FP exhaust manifold/Victory Performance 2.5" o2 housing/Tial 40mm WG w/ open dump/Pacesetter 1g 3" downpipe/3" hollow high flow cat/3" catback/

citymunky

  • *
  • 84
    • Galant VR-4
    • 1991
    • Head: 1G (large ports)
    • Motor: 4G63 2.0L
    • Turbo: TD05H-20
Re: Grounding locations
« Reply #6 on: January 29, 2011, 12:57:09 PM »
Yup, I don't have a ground wire on my TB. Does it goes from the TB to the block?
'91 Galant VR-4 (1505/2000). Fresh TD05H-20G, JE Pistons/ Crower rods/ HKS 272 Cams/1g head/1g Non-Turbo throttle body/Cyclone intake manifold/FP exhaust manifold/Victory Performance 2.5" o2 housing/Tial 40mm WG w/ open dump/Pacesetter 1g 3" downpipe/3" hollow high flow cat/3" catback/

AlphaVision

  • *
  • 94
    • Eclipse GSX
    • 1999
    • Head: 1G (large ports)
    • Motor: 4G63 2.0L
    • Turbo: FP68HTA
Re: Grounding locations
« Reply #7 on: January 31, 2011, 03:23:35 AM »
I also have NT TB, but it should ground just fine because the TB doesn't stay sandwitched between 2 gaskets so the bolts from the manifold transfer the current.
99 GS body (Euro spec)
97 GSX drivetrain
91 ECU
6 bolt long block
[email protected] 1/4

Faster Mitsubishi club Bulgaria

vigilart

  • *
  • 38
    • Talon TSI AWD
    • 1992
    • Head: 1G (large ports)
    • Motor: 4G63 2.0L
    • Turbo: evo3 16g
Re: Grounding locations
« Reply #8 on: January 31, 2011, 10:14:14 AM »
I never knew that there was a ground on the throttle body.  My car has always been rich on decel.  Gunna have to fix this and see how it helps.
1992 eagle talon tsi, stock block and head, evo III 16g, large fmic, 3" turbo back exhaust, fp race mani, 750cc inj, wali 255 pump w/rewire, fuel pressure regulator, aem wideband,

Ravewolf

  • *
  • 33
    • Talon TSI
    • 1991
    • Head: 1G (large ports)
    • Motor: 4G63 2.0L
    • Turbo: 14b
Re: Grounding locations
« Reply #9 on: March 08, 2011, 12:04:59 AM »
I never knew that there was a ground on the throttle body.  My car has always been rich on decel.  Gunna have to fix this and see how it helps.
Me three. My wideband spikes to 12.5 or higher on decel. Always figured it was normal, but guess not.
91 Eagle Talon TSI-Stock head, cams, FIC 850s, HDR MBC, ECMLink Socketed ECU, Stock 14b,3" exhaust turbo back(no cat,muffler),LC1, SMIC,stock bov,stock internals, balance shafts, stock coils

Mr Peepers

  • *
  • 62
    • Talon TSI AWD
    • 1991
    • Head: 1G (large ports)
    • Motor: 4G63 2.0L
    • Turbo: HX35
Re: Grounding locations
« Reply #10 on: March 08, 2011, 08:38:54 PM »
Quick and dirty method is to ground the wire going to the idle switch directly during idle and see if it steadies.  The idle switch itself is failure prone and should be looked at as well.
Stock 6 bolt, 272/272, 7 blade HX35 w/ twin scroll manifold, old unknown name top to bottom FMIC, 1200's, single 255, e85, LC-1.

HX35- [email protected] QTP Auto/[email protected] street tire 28psi
16g-   [email protected] on 23 psi and QTPs
14b-   [email protected] on street tires