The check engine light comes on continuously?

1994 MITSUBISHI 3000GT
57,000 MILES • 6 CYL • 2WD • MANUAL
Avatar
NDTORRES
  • MEMBER
  • 5 POSTS
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.
Aug 18, 2022 at 3:59 PM
Advertisement
Avatar
JACOBANDNICKOLAS
  • CERTIFIED EXPERT
  • 110,175 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
Aug 18, 2022 at 8:03 PM
Avatar
NDTORRES
  • MEMBER
  • 5 POSTS
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
Aug 25, 2022 at 12:33 PM
Advertisement
Avatar
NDTORRES
  • MEMBER
  • 5 POSTS
Hello again,

Any recommendations as to what analog voltmeter I should purchase?

Regards,

Nestor
Aug 25, 2022 at 12:57 PM
Avatar
JACOBANDNICKOLAS
  • CERTIFIED EXPERT
  • 110,175 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.
Aug 25, 2022 at 6:27 PM
Avatar
NDTORRES
  • MEMBER
  • 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
Sep 24, 2022 at 5:52 PM
Avatar
JACOBANDNICKOLAS
  • CERTIFIED EXPERT
  • 110,175 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
Sep 24, 2022 at 9:21 PM
Avatar
NDTORRES
  • 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
Sep 25, 2022 at 1:52 PM
Avatar
JACOBANDNICKOLAS
  • CERTIFIED EXPERT
  • 110,175 POSTS
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

See pics below.
Sep 25, 2022 at 6:55 PM
Avatar
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
Sep 26, 2022 at 5:56 PM
Avatar
JACOBANDNICKOLAS
  • CERTIFIED EXPERT
  • 110,175 POSTS
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

See pic below.
Sep 26, 2022 at 7:27 PM