Fuel System?

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
Hi,

When you checked the plugs, was there spark or none? Also, did you try to check for diagnostic trouble codes?

If there is no spark, the next thing I need you to check is for power at the coil. I found some old manufacturer's wiring schematics. I attached them below. Note that it was only one page in length. I had to cut it in half to make it readable. I did overlap them so you can follow from one to the next.

Check the coil for power. Also, confirm the ECU hasn't been slightly disconnected (pic 3). If you remember which wire your hand got caught on, let me know that as well.

Let me know what you find.

Take care,

Joe

See pics below.
Was this
answer
helpful?
Yes
No
Saturday, May 6th, 2023 AT 7:23 PM
Tiny
GCROW
  • MEMBER
  • 57 POSTS
Yeah, they had spark. When I checked for codes, the check engine light didn’t blink. The distributor incident happened when I was replacing the pigtail on top of the transmission. The distributor got turned by me trying to squeeze my arm around it. I appreciate the schematics; I have been considering doing some wire inspection and I am sure these will help. I have already run my multi-meter throughout the entire wiring harness. Don’t guess it could hurt to do it again. Unfortunately, I am a tad on the disabled side, so any amount of DIY proves to be a bit more difficult that it should be. I will keep you posted on any progress or lack there of.
Was this
answer
helpful?
Yes
No
Sunday, May 7th, 2023 AT 10:41 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
Hi,

I'm sorry to hear that. Let me know if there is anything I can do that would help you. As far as the issue, if you do have spark and fuel, it should run. Something isn't adding up. Even if you turned the distributor, it would still try to run or backfire or something.

You did say at one point, flames came from the carb. That is an indication of a timing or internal issue. However, the distributor wasn't removed. Ugh!

Remove the distributor cap and see if there is excessive play in the distributor shaft. See if you are able to move the rotor excessively back and forth. Maybe something is damaged in the distributor causing a timing issue.

Let me know.

Take care of yourself.

Joe
Was this
answer
helpful?
Yes
No
Sunday, May 7th, 2023 AT 9:03 PM
Tiny
GCROW
  • MEMBER
  • 57 POSTS
Thank you, your help is greatly appreciated.
There is a lot of backfire. It occurred to me (after coming across it), I didn't put the capacitor back in place when I put the coil back in. Had to remove the coil to make room to get my hand through. Is there any way it could be that simple?
Was this
answer
helpful?
Yes
No
Monday, May 8th, 2023 AT 10:50 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
Hi,

Capacitor? Can you upload a pic of what you are seeing? There really isn't a capacitor in the ignition system.

Also, if it is backfiring, were the spark plug wires removed and replaced? If so, are you sure the wires are in the correct firing order? See pic below.

When I heard it cranking, I didn't notice any backfiring. Let me know what is happening.

Take care,

Joe

See pic below.
Was this
answer
helpful?
Yes
No
Monday, May 8th, 2023 AT 6:57 PM
Tiny
GCROW
  • MEMBER
  • 57 POSTS
I call it a capacitor. Normal people call it a condenser, wire to positive lead and mounted between the coil and firewall. I will check the wire order again. Couldn't hurt. The noise of cranking may have drowned out the backfiring.
Was this
answer
helpful?
Yes
No
Monday, May 8th, 2023 AT 7:26 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
Hi,

Have you replaced it? That could be causing an issue.

Let me know.

Joe
Was this
answer
helpful?
Yes
No
Monday, May 8th, 2023 AT 8:32 PM
Tiny
GCROW
  • MEMBER
  • 57 POSTS
Not yet, I wanted to get your thoughts first.
Was this
answer
helpful?
Yes
No
Monday, May 8th, 2023 AT 8:41 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
In the old days, that is what was used with points in the distributor. It prevented arcing by absorbing power when the points opened. (Electric always takes the easiest way out). If that is tied into the ignition system, that could be allowing spark to be jumping around. I would give it a try.

Joe
Was this
answer
helpful?
Yes
No
Monday, May 8th, 2023 AT 9:13 PM
Tiny
GCROW
  • MEMBER
  • 57 POSTS
Hey Joe, I was comparing the firing order you sent to what is in the pickup. The image shows #1 towards the 7 o'clock position. I have it with the #1 wire at approximately the 5 o'clock position, more or less aimed towards piston #1.
Was this
answer
helpful?
Yes
No
Thursday, May 11th, 2023 AT 9:02 AM
Tiny
GCROW
  • MEMBER
  • 57 POSTS
I guess I'm asking which of the 3 is correct. Aimed towards the #1 piston, the example you sent me or the example from my Chilton manual. See pic below
Was this
answer
helpful?
Yes
No
Friday, May 12th, 2023 AT 8:55 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
Hi,

The pic I attached above is correct. You need to align the TDC mark on the crankshaft pulley with the indicator. Once that is at TDC, the rotor should point to the front of the vehicle. Is that what you have?

Joe
Was this
answer
helpful?
Yes
No
Friday, May 12th, 2023 AT 7:18 PM
Tiny
GCROW
  • MEMBER
  • 57 POSTS
Hey Joe, would you happen to know where I can find a better wiring diagram/schematic than what's in my manuals? There are a lot of wires not shown in these.
Was this
answer
helpful?
Yes
No
Sunday, May 28th, 2023 AT 9:01 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
Which ones are needed? Let me know. Although my manual is somewhat limited, there are a lot of schematics for specific things. Other than me, you can purchase a Hynes or Chilton manual from most parts stores.

Let me know.

Joe
Was this
answer
helpful?
Yes
No
Sunday, May 28th, 2023 AT 8:19 PM
Tiny
GCROW
  • MEMBER
  • 57 POSTS
I actually have both manuals. I tend to get both manuals for all my vehicles. The connection point to the inside wiring at the firewall doesn't seem to be represented, nor do all the colors of different wires I am finding.
Was this
answer
helpful?
Yes
No
Monday, May 29th, 2023 AT 9:44 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
Hi,

I'm not sure why they would be different. Is there a chance the wiring may have been changed at some point?

Joe
Was this
answer
helpful?
Yes
No
Tuesday, May 30th, 2023 AT 8:37 PM
Tiny
GCROW
  • MEMBER
  • 57 POSTS
Ya know, knowing the previous owner, that would not surprise me in the least. For example, the EGR system and cruise control were both completely eliminated.
Was this
answer
helpful?
Yes
No
Wednesday, May 31st, 2023 AT 7:43 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
Oh boy. That isn't encouraging. Are you able to use the schematics to follow specific wires and determine if they seem to be going to the correct places?

Let me know.

Joe
Was this
answer
helpful?
Yes
No
Wednesday, May 31st, 2023 AT 9:49 PM
Tiny
GCROW
  • MEMBER
  • 57 POSTS
For the most part, yes. Only a few wires I am have trouble with. I will see if I can get some pics of them to show you.
Was this
answer
helpful?
Yes
No
Thursday, June 1st, 2023 AT 8:18 AM
Tiny
GCROW
  • MEMBER
  • 57 POSTS
Okay, so I tried to get a pic or three of the wires. Couldn't tell some colors from the others. What I found was that one set went to the eliminated EGR time delay, another to a solenoid that doesn't exist in a light duty truck. Still tracing wired to make sure no breaks or fraying and such. Meanwhile, darn thing still will not start.
Was this
answer
helpful?
Yes
No
Saturday, June 3rd, 2023 AT 6:31 PM

Please login or register to post a reply.

Sponsored links