Crank, no start after bad plug wire arced

Tiny
LUMBERJACK4205
  • MEMBER
  • 1994 SATURN SC2
  • 1.9L
  • 4 CYL
  • 2WD
  • MANUAL
  • 200 MILES
So I've been trying to figure this out for about a week now and I am stumped. I went to change plug wires, after I started the car and was running fine but as I went to look under the hood I brushed a wire which arced and the motor shut off. On closer inspection I found the wires were the wrong ones so I got new ones and still no start. On first crank it briefly tries to start then just cranks like it's getting no spark but I checked each plug and they all have spark and fuel is good. It's like something in the computer is shutting it down after the first crank I've done the CPS and ECTS tried new plugs and at one point it actually started briefly then shut off. This was after finding the #7 30a fuse under the hood had blown. Now I'm back to just cranking for some reason.
Sunday, April 18th, 2021 AT 1:37 PM

4 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,320 POSTS
Hi,

If you have spark and fuel, it should run. Do me a favor. See if it starts for a couple of seconds using starting fluid. If it does, then we know it is a fuel-related issue. If there is no change and it doesn't try to start, then it is likely ignition.

Also, the number 7 fuse in the underhood fuse box (30 amp) is for the power windows. So, I'm not sure what happened. (see pic 1 below)

Was it a spark plug wire that arced? What did it arc to?

Take a look through this link and let me know if it helps:

https://www.2carpros.com/articles/car-cranks-but-wont-start

Also, if you haven't already, check for diagnostic trouble codes. This vehicle has an OBD1 system that doesn't require a scan tool. All you will need is a short jumper wire or even a paper clip.

Here is a link that explains how to retrieve codes:

https://www.2carpros.com/articles/buick-cadillac-chevy-gmc-oldsmobile-pontiac-gm-1983-1995-obd1-code-definitions-and-retrieval-method

Do that as well and let me know what codes are found.

Let me know.

Joe

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Sunday, April 18th, 2021 AT 6:40 PM
Tiny
LUMBERJACK4205
  • MEMBER
  • 3 POSTS
Was the #6 fuse actually which is cooling fan though I figured it may have other circuits tied in. The only code was 23 which I think was the ECTS but not sure I'm remembering right. Today I inspected around the steering column and found a black wire slightly thinner than the others which looked like the insulation had been partially melted away for about 4 inches so I replaced the damaged section and made sure no surrounding wires were exposed. Also around the same moment I noticed the harness located in the center console under the parking brake was slightly unplugged and once I plugged it back in and gave it another crank the sound was very different like stumbling or choking but not quite catching and the rpm hardly jumped at all. Also mine is all manual yet still has relays and fuses for the power options in place which begs the question, what are they providing power to? Oh yeah and before changing that #6 fuse the fuel pump was not running upon turning the key.
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Sunday, April 18th, 2021 AT 7:29 PM
Tiny
LUMBERJACK4205
  • MEMBER
  • 3 POSTS
Maybe a timing issue or the other culprit that comes to mind would be the ICM. Now that I think about it when the crank changed it seemed like it's time had changed and for a minute there I thought it might start but still barely budged the RPMs. How can I check to see if the timing was thrown off? I just did the valve cover gasket as there was some oil in the plug wells and I thought it looked like the marks matched but I'm not sure I'm looking at the right marks. Another piece of info I have a multimeter and a fair understanding of electrical so I've tested all over and though the ICM gets 12v on the out blade the numbers read on the harness was something like.2.3 .4 and then 12.48 while the second harness was similar except no 12v and this was done with the key on.
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Sunday, April 18th, 2021 AT 7:39 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,320 POSTS
Hi,

The code is related to the intake air temperature sensor which could be causing the problem. This sensor is located in the air induction tube. Make sure it wasn't left disconnected or the wiring isn't damaged to it.

Below, the first 4 pics are the diagnostics for this code. Pics 5 and 6 are the removal and replacement directions for the sensor. Pic 5 actually shows the location of it.

Let me know what you find or if you have other questions.

Take care,

Joe

See pics below.
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Sunday, April 18th, 2021 AT 8:07 PM

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