1993 Infiniti G20

Tiny
FIRE_BF
  • MEMBER
  • 1993 INFINITI G20
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 160,000 MILES
I have an 1993.5 infiniti g20 when I first got it I had to replace the engine. Replaced with engine that was manual.

I am having the issue with my car where it acts like it doesnt know when to shift; I have also noticed when going down the road I feel the wheel wiggle left and right about 0-40mph. I know I need an alignment it pulls to the right.

It has the A/T Switch where you can switch between Power and Comfort Modes; I leave it on auto. Sometimes when it needs to shift the light comes on for a split second like a flicker, when I start the car I do know it needs to have that light turn on to signal good to go but it mostly just blinks about 16 times. I try to restart the engine but usually is the same. Also sometimes when I stop it luggs and just dies. It usually works fine about 40mph and above. Runs great when its not in fail-safe mode.

We replaced the VSS-Vehicle Speed Sensor, Drained the system, We have even reset the ECU (when I reset the computer it did blink a code but I think it was before the engine was replaced blinked 34 code; Which is Knock Sensor. Which I cleared.

i have done the onboard diagnostics without consult and it has to do the 10 blinks it, It has done 2 different ones at couple different times:
X-0-0-0-0-0-0-0-0-0-0 and X-X-0-0-0-0-0-0-0-0

The OD light does not blink at all, SES check engine light is not on.

I have the FSM for a 1994 infiniti g20
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Sunday, January 31st, 2010 AT 9:06 PM

5 Replies

Tiny
KHLOW2008
  • EXPERT
Hi fire_bf,

Thank you for the donation.

The codes indicates a fault with the VSS and/or revolution sensor. Here are the diagnostics for the revolution sensor.

REVOLUTION SENSOR TEST (TRANSMISSION MAINSHAFT)

1. Check resistance between White and Black wire terminals at revolution sensor. Resistance should be 500-650 ohms. If resistance is not as specified, replace sensor.

2. Revolution sensor is a voltage generating sensor and should be tested using a voltmeter set on AC scale. Check voltage between ATCU terminal No. 25 and ground while driving vehicle. Voltage should rise gradually relative to vehicle speed. At zero MPH, voltage should not be present. If voltage does not rise when vehicle is driven, repair circuit as
necessary.
2.
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Monday, February 1st, 2010 AT 1:05 PM
Tiny
FIRE_BF
  • MEMBER
We checked the revolution sensor it showed 500 between 1-2

so it looks ok I think

but is there any other thing that could cause that.

Wiggle in tire was fixed. Just needed tires
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Sunday, February 7th, 2010 AT 5:59 PM
Tiny
KHLOW2008
  • EXPERT
If the sensor is good, then you need to check the wiring circuit as per the test in previous post.

Something could be loose or contacts contaminated.
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Monday, February 8th, 2010 AT 9:50 AM
Tiny
FIRE_BF
  • MEMBER
Ok that is what I was thinking it could be wiring

ok when we did it we took the MAF and the battery out to find the wiring

we tested it for that night it kept going in to failsafe but the next morning I defogged the windows and it works great not in failsafe mode and I spent today trying to get it to fault

so ill see how long it lasts
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Monday, February 8th, 2010 AT 5:28 PM
Tiny
KHLOW2008
  • EXPERT
Sorry for the delay in replying.

Yes, the symptoms seems to indicate a loose wiring connection somewhere. Recheck all wiring connectors for contaminations and if you require further assistance, just post reply and I would get back to you as soon as I am online.
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Thursday, February 11th, 2010 AT 12:18 PM

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