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The check engine light comes on continuously?

Tiny
NDTORRES
  • MEMBER
  • 1994 MITSUBISHI 3000GT
  • 6 CYL
  • 2WD
  • MANUAL
  • 57,000 MILES
The check engine light comes on continuously. I have in the past put in higher octane booster and marvel mystery oil to the gas and it too care of it for a while. The problem is that I don't drive the car very often if hardly at all.
Thursday, August 18th, 2022 AT 3:59 PM

10 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,709 POSTS
Hi,

If the light stays on, there must be diagnostic trouble codes stored. Have you tried to retrieve them to see what is causing the light to remain on? If you haven't, that needs to be done.

Here is a link that explains how it's done on a Mitsubishi OBD1 system. Follow this link and let me know what you find.

https://www.2carpros.com/articles/mitsubishi-trouble-code-definitions-and-retrieval-procedure-for-odb1-system

I had one of these vehicles years ago. Great car!!!

Take care and let me know what you find.

Joe
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Thursday, August 18th, 2022 AT 8:03 PM
Tiny
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Thank you and sorry for the late reply. I will need to buy an analog style of voltmeter (sweeper arm) to follow your instructions. As soon as I get one and try it, I will let you know what happens.

Best regards,

Nestor
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Thursday, August 25th, 2022 AT 12:33 PM
Tiny
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Hello again,

Any recommendations as to what analog voltmeter I should purchase?

Regards,

Nestor
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Thursday, August 25th, 2022 AT 12:57 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,709 POSTS
Hi,

I wouldn't spend too much on one if you won't use it in the future. I found one at Lowes for 13 dollars. This would more than do the job for you.

I attached a pic below. I don't know where you're located, but if there is a Lowes near you, this would be good for you. You can also order them online.

I still have an older Motorola analog meter that still works great. That would be a good brand as well. Mine is 30 years old. LOL

I hope this helps.

Take care,

Joe

See pic below.
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Thursday, August 25th, 2022 AT 6:27 PM
Tiny
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  • 5 POSTS
Hello,

Sorry for my usual delays but I finally bought the Analog Multimeter you suggested but I don't see where I set it to continuity. Can you please let me know how to do that?

Best regards,

Nestor
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Saturday, September 24th, 2022 AT 5:52 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,709 POSTS
Hi,

No problem. I attached your pic below and circled the two settings for resistance (Ohms) That is what is used to check for continuity.

Joe
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Saturday, September 24th, 2022 AT 9:21 PM
Tiny
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  • MEMBER
  • 5 POSTS
Hello again,

I do not like to be such a pain, but I cannot find the connector anywhere on the 1994 3000GT. Any idea where it could be? I can't seem to find it anywhere need the fuse box or surroundings.

Best regards,

Nestor
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Sunday, September 25th, 2022 AT 1:52 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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Nestor,

You are in no way being a pain. If you don't ask questions, I don't have a job. LOL

The DLC is located on the left side of the vehicle's passenger compartment under the dash. I attached two pics below. Let me know if you are able to find it.

Take care,

Joe

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Sunday, September 25th, 2022 AT 6:55 PM
Tiny
NDTORRES
  • MEMBER
  • 5 POSTS
Hello,

I believe that I can touch under the dash where you have indicated and feel the unit. However, I am disabled and trying to get under the dash is impossible for me. You almost have to be a contortionist. Can this unit be dislodged or is it there permanently? Without a OBD1 to hook it up, I don't see being able to get under the dash to use the voltmeter.

Any ideas on where I can buy a Mitsubishi OBD1 unit?

Best regards,

Nestor
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Monday, September 26th, 2022 AT 5:56 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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Nestor,

Wow, it may be hard to get one. Some OBD2 scanners can be used on OBD1 but they require a connector to go from the 12-pin OBD1 port to a 16-pin OBD 2 scan tool.

The connectors are really inexpensive, but your scanner needs to be able to do this. A basic scan tool will likely not do it.

Let me know if that helps. Also, I attached a pic from eBay of what I'm referring to.

Take care,

Joe

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Monday, September 26th, 2022 AT 7:27 PM

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