86 SC no spark no fuel. I'm at a standstill. - Turbo Dodge Forums : Turbo Dodge Forum for Turbo Mopars, Shelbys, Dodge Daytona, Dodge SRT-4, Chrysler PT Cruiser, Omni and more!
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post #1 of 60 Old 10-05-2019, 05:11 PM Thread Starter
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Angry 86 SC no spark no fuel. I'm at a standstill.

I'm throwing myself at the mercy of the forum. I've googled, i've printed pages, run through diagnostics, I've learned a lot and made progress, however I've hit a wall.

Back story this Shelby was found in a field and it hasn't been on the road in 25 years. Original owner died, and I assume this issue was present back then as well. I've repaired wires, cleaned connections, the engine turns over, I get codes at the cluster, mostly 33 and 55. This car has no AC. so I assume the LM is working, I hear some clicking noises from the PM when I turn the key on and I do hear a short whirring noise under the hood when I turn the key on. but that is as far as I've been able to get.

The HEP is new, the cap is new, rotor is new, wires and plugs all new. If I connect a test light to the + of the coil and ground, I get a one second flash when key on, and a steady light when cranking. On the other hand when I put that same test light on the - of the coil and ground I get nothing. according to an article I read, I changed the coil with a new Standard blue streak coil but nothing new.

I tried the ASD relay jumper from the under hood diagnostics connector to the ground on the battery but nothing happened except flashing a 42 & 43 code. and this is the part where I'm at a standstill. so If anyone can enlighten as to where I should go next I would greatly appreciate it.
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post #2 of 60 Old 10-06-2019, 12:17 AM
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Re: 86 SC no spark no fuel. I'm at a standstill.

Here is clarification on how the coil works, so you may want to read the following about the coil.
https://www.turbododge.com/forums/f1...ml#post4126329

The one second light at the coil is fine as this is the fuel pump prime. It will do this for three "key on". During cranking it should be on all the time. So it sound like the ASD is working. Are you sure you are getting fuel pressure to the rail?
no pulse on the negative coil line point toward the coil - line voltage is not dropping. This is controlled by the PM/LM and yes it could be a faulty HEP.
Did you check NAJ's no start primer? https://www.turbododge.com/forums/f4...k-84-90-a.html
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post #3 of 60 Old 10-06-2019, 12:36 AM
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Re: 86 SC no spark no fuel. I'm at a standstill.

do you have a Factory service manual FSM they are so valuable?
The are commonly sold on ebay for a reasonable price
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post #4 of 60 Old 10-06-2019, 10:58 AM
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Re: 86 SC no spark no fuel. I'm at a standstill.

early log style turbo motor will not start IF the woven ground strap running from the fuel injector rail bolt to the firewall is not intact or disconnected or excessively loose at the firewall

guaranteed no start without that strap

there's also a wire in top of the transmission with a bolt sized ring eye on the end

(below air filter area)

it simply bolts to the top of the trans case but it is also a ground that will prevent starting if not connected
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post #5 of 60 Old 10-06-2019, 11:30 AM Thread Starter
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Well I think you might be on to something, it’s still connected but seriously damaged.
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post #6 of 60 Old 10-06-2019, 12:50 PM
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Re: 86 SC no spark no fuel. I'm at a standstill.

the factory used a longer woven ground strap for the radios - if you need to find one quickly
-same sized bolt eyes

usually they're in really good condition being under the dash
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post #7 of 60 Old 10-06-2019, 05:57 PM Thread Starter
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Is this anything I should be concerned about ? This is on the front of the engine? I did change the braided ground but didn’t advance any further in my quest. I’m going to have to struggle through those electrical posts and force myself to understand this system.
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post #8 of 60 Old 10-06-2019, 05:58 PM Thread Starter
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Better shot
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post #9 of 60 Old 10-06-2019, 07:15 PM
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Re: 86 SC no spark no fuel. I'm at a standstill.

Quote:
Originally Posted by midnightmopar View Post
Better shot
Not sure what that is but that connection never got cleaned.

Invest in some service manuals to make your life easier:

https://www.ebay.com/itm/1986-DODGE-...gAAOSwRgJXjj11

https://www.ebay.com/itm/1986-Dodge-...fba778d425770f

I'd double check your connections & put some dielectric grease on them. Remember, it's a 33 year old car that's been sitting for what, 25 years?

Good luck!
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post #10 of 60 Old 10-07-2019, 05:12 AM Thread Starter
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Thanks for the links to those service manuals I grabbed both. Once I get this car running I can clean everything and start to restore. It will run again!
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post #11 of 60 Old 10-07-2019, 07:38 AM
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Re: 86 SC no spark no fuel. I'm at a standstill.

If you haven't already done so, download the parts manual for your year:

https://www.turbododge.com/forums/f4...-pdf-82-a.html

This plus the service manuals will give you a great source of information!
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post #12 of 60 Old 10-07-2019, 08:38 AM
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Re: 86 SC no spark no fuel. I'm at a standstill.

Quote:
Originally Posted by midnightmopar View Post
Better shot
Oil pressure switch, good idea to fix but not the Ag bullet
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post #13 of 60 Old 10-07-2019, 08:49 AM
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Re: 86 SC no spark no fuel. I'm at a standstill.

Basic electrical troubleshooting
https://www.turbododge.com/forums/f4...-tutorial.html
another electricity basics
https://www.turbododge.com/forums/f4...operation.html
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post #14 of 60 Old 10-07-2019, 10:46 AM
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Re: 86 SC no spark no fuel. I'm at a standstill.

I'm Back!!!

From what i have read your ASD Relay (integral to the PM on 85-87) is functioning and the car is seeing a crank signal so the ASD Relay is being actuated, however...

Start at the top of these diagnostics and post back. I need to know exactly where we are.
https://www.turbododge.com/forums/f4...k-84-90-a.html
(When checking fault codes since you have been testing systems...
Clear the codes, be sure the codes have cleared before cranking the engine and then crank the engine for 7-10 seconds, recheck for codes, did any codes return?)

Jan
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40 Years ASE Certified (Retired)
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post #15 of 60 Old 10-07-2019, 12:02 PM
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Re: 86 SC no spark no fuel. I'm at a standstill.

Quote:
Originally Posted by midnightmopar View Post
Well I think you might be on to something, itís still connected but seriously damaged.
not connected "enough"

also , a simple no spark cause is a broken or striped timing belt

if the belt is kaput then the intermediate shaft don't turn
the dist don't turn
the hep sends no signal to the controller
the controller shuts power off...

so , you have no spark

remove the cap

tap the key to bump the motor slightly

go back to see if rotor moved

if not you'll need to look up timing belt replacement
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