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420A Help 2g eclipse no spark

Daniel b

Proven Member
44
5
Sep 15, 2021
Middletown, Rhode_Island
So I bought a 1999 Mitsubishi Eclipse gs 420a engine, it cranks but won’t start and has no spark, I have changed crank sensor and coil pack. Any ideas?
 

Daniel b

Proven Member
44
5
Sep 15, 2021
Middletown, Rhode_Island
yea, connector is supposed to face down, and make sure you have everything plugged in, I know how it is when you're unplugging and testing out stuff, it's easy to forget to plug tyhem back, wouldn't hurt to spray some connector spray in the connectors, or wd40, these are old cars so corrosion on connector pins can also cause electrics to fail
with the battery unplugged and let it sit? For a bit before re connecting
 

Sirius1995

Proven Member
62
8
Jun 15, 2021
Hattiesburg, Mississippi
Well you mind as well, and you can do hard reset for the computer by unplugging both terminals and hook them together, it empties capacitors and does a hard reset for the ECM, spray some connector spray etc. And you can plug it back right away unless bottle says differently, they have instructions
 

Daniel b

Proven Member
44
5
Sep 15, 2021
Middletown, Rhode_Island
Well you mind as well, and you can do hard reset for the computer by unplugging both terminals and hook them together, it empties capacitors and does a hard reset for the ECM, spray some connector spray etc. And you can plug it back right away unless bottle says differently, they have instructions
Well I just have wd40
 

Sirius1995

Proven Member
62
8
Jun 15, 2021
Hattiesburg, Mississippi
Bottle of connector spray costs like $3 in AZ, it's useful in these cars in general so wouldn't hurt to have a bottle of that on your shelf
 

Daniel b

Proven Member
44
5
Sep 15, 2021
Middletown, Rhode_Island
Bottle of connector spray costs like $3 in AZ, it's useful in these cars in general so wouldn't hurt to have a bottle of that on your shelf
Yeah if I can’t make a run to the store today would wd40 be good?
 

Sirius1995

Proven Member
62
8
Jun 15, 2021
Hattiesburg, Mississippi
Yea you can use wd40 or crc, but it's not as effective so let it soak in a few minutes amd unplug-replug a few times
 

Sirius1995

Proven Member
62
8
Jun 15, 2021
Hattiesburg, Mississippi
To reset the electrical systems all you have to do is pull the positive battery cable for 30 seconds.
To empty capacitors, hook up positive and negative cables for 10-15minutes

I've fixed so many cars just by doing that, also erases history codes from the system
 

Sirius1995

Proven Member
62
8
Jun 15, 2021
Hattiesburg, Mississippi
Electronic computer module = ECM
Electronic computer unit = ECU

Different terms but means the same
ECU is universally used, ECM is more commonly used in the dealerships, makes it more formal
 

Daniel b

Proven Member
44
5
Sep 15, 2021
Middletown, Rhode_Island
Electronic computer module = ECM
Electronic computer unit = ECU

Different terms but means the same
ECU is universally used, ECM is more commonly used in the dealerships, makes it more formal
Oh okay thank you

Oh okay thank you
Electronic computer module = ECM
Electronic computer unit = ECU

Different terms but means the same
ECU is universally used, ECM is more commonly used in the dealerships, makes it more formal
I pretty much cleaned all connectors etc and reset ecu still no spark
 

Daniel b

Proven Member
44
5
Sep 15, 2021
Middletown, Rhode_Island
20 Vdc. 20 meaning it measures a maximum of 20 volts, you should read around 12. Vdc meaning volts direct current.
So I disconnected power to coil and the relays keep clicking.
 
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