1986 No Start No Spark
Thread Starter
Pro
Joined: Aug 2010
Posts: 617
Likes: 17
From: Hamilton Ontario
1986 No Start No Spark
1986 Coupe..stock TPI...Stock Ignition.
Car drove beautifully the last while, Parked it 2 nights ago...got in to start it the next morning and would not START...cranks and cranks and does not even try to catch.
Pulled the codes...NO Codes
Checked all the fuses with my Multi Meter...All good
Hooked up a fuel pressure gauge and i get 42psi key on...drops a few psi while cranking...bleeds down to 20psi in about 15mins...not great..but still okay.
Pulled the vacuum line on the regulator...no fuel or fuel smell...its good.
Checked for spark by pulling a spark plug wire and inserting an old plug i had...grounded the plug to the block..cranked...NO Spark
Sounds like a HEI Issue...into my spare parts box...
Ignition coil 6 months old...swapped it out with a spare i had ...still no start...tested both of my ignition coils with a multi meter and they ohmed within specs
Pulled the cap and rotor (6 months old) they look good,,,swapped them out one at a time with my spares...no start
Changed the 7 pin Ignition Module with a new Delco...same results...No Start...No Spark
I even swapped in my spare ECM with no results
Am i missing something??
Where do i go next?....and dont say the dealership...LOL
Thanks in Advance
Car drove beautifully the last while, Parked it 2 nights ago...got in to start it the next morning and would not START...cranks and cranks and does not even try to catch.
Pulled the codes...NO Codes
Checked all the fuses with my Multi Meter...All good
Hooked up a fuel pressure gauge and i get 42psi key on...drops a few psi while cranking...bleeds down to 20psi in about 15mins...not great..but still okay.
Pulled the vacuum line on the regulator...no fuel or fuel smell...its good.
Checked for spark by pulling a spark plug wire and inserting an old plug i had...grounded the plug to the block..cranked...NO Spark
Sounds like a HEI Issue...into my spare parts box...
Ignition coil 6 months old...swapped it out with a spare i had ...still no start...tested both of my ignition coils with a multi meter and they ohmed within specs
Pulled the cap and rotor (6 months old) they look good,,,swapped them out one at a time with my spares...no start
Changed the 7 pin Ignition Module with a new Delco...same results...No Start...No Spark
I even swapped in my spare ECM with no results
Am i missing something??
Where do i go next?....and dont say the dealership...LOL
Thanks in Advance
Drifting
Joined: May 2013
Posts: 1,736
Likes: 31
From: Reno Nevada
Thread Starter
Pro
Joined: Aug 2010
Posts: 617
Likes: 17
From: Hamilton Ontario
See if this helps:
http://www.chevythunder.com/Flow%20c...roubleshooting Flow Chart Pages
http://www.chevythunder.com/Flow%20c...roubleshooting Flow Chart Pages
Im leaning towards the distributor as the culprit,,,maybe the pick up coil is bad...though i hear these are "rarely" defective??
Thread Starter
Pro
Joined: Aug 2010
Posts: 617
Likes: 17
From: Hamilton Ontario
Just bought a noid light set and tried the light on a few different injector clips...there is no injector pulse either...doesn't seem to be any spark or injector pulse.
Would a bad pick up coil cause these issues??
Maybe something to do with VATS??
i ohmed all the injector coils...13.2 x 6 and 12.8 x 2....kinda low but shouldnt be an issue....Brand new Bosch III from FIC 2000 miles ago.
Would a bad pick up coil cause these issues??
Maybe something to do with VATS??
i ohmed all the injector coils...13.2 x 6 and 12.8 x 2....kinda low but shouldnt be an issue....Brand new Bosch III from FIC 2000 miles ago.
Thread Starter
Pro
Joined: Aug 2010
Posts: 617
Likes: 17
From: Hamilton Ontario
Yes...there is 12v at the White connector B+ on the cap to the ignition coil lead.
I tried to follow the flow charts in the manual and i am stuck at pick up coil test...if i did it correct with my ohmeter...i believe my p/u coil is failed
I tried to follow the flow charts in the manual and i am stuck at pick up coil test...if i did it correct with my ohmeter...i believe my p/u coil is failed
Team Owner
Joined: Jan 2003
Posts: 20,322
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From: Summerland B.C. Canada
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Thread Starter
Pro
Joined: Aug 2010
Posts: 617
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From: Hamilton Ontario
Using the FSM...did the test in section 6D4-8 and i could not get any reading on my ohm meter while touching both leads of the pick up coil...manual says if should read between 500-1500 ohms.
I tried my meter on all 6 ohm settings and the number always read 1 (infinite?)....
I guess that means my P/U Coil is shot?
The ignition coil ohmed out fine within specs using the tests in the same section of the FSM
I tried my meter on all 6 ohm settings and the number always read 1 (infinite?)....
I guess that means my P/U Coil is shot?
The ignition coil ohmed out fine within specs using the tests in the same section of the FSM
Slingshot
Joined: Dec 2001
Posts: 3,817
Likes: 24
From: Charlotte NC
Using the FSM...did the test in section 6D4-8 and i could not get any reading on my ohm meter while touching both leads of the pick up coil...manual says if should read between 500-1500 ohms.
I tried my meter on all 6 ohm settings and the number always read 1 (infinite?)....
I guess that means my P/U Coil is shot?
The ignition coil ohmed out fine within specs using the tests in the same section of the FSM
I tried my meter on all 6 ohm settings and the number always read 1 (infinite?)....
I guess that means my P/U Coil is shot?
The ignition coil ohmed out fine within specs using the tests in the same section of the FSM
http://www.ecklerscorvette.com/corve...1984-1991.html
Thread Starter
Pro
Joined: Aug 2010
Posts: 617
Likes: 17
From: Hamilton Ontario
Yes, I'd say that your pickup coil is the next item to consider replacing.
http://www.ecklerscorvette.com/corve...1984-1991.html
http://www.ecklerscorvette.com/corve...1984-1991.html
I will probably hunt around for a good used distributor all in one ...mine is looking pretty tired inside...cracked and broken plastic pieces..etc..
Thread Starter
Pro
Joined: Aug 2010
Posts: 617
Likes: 17
From: Hamilton Ontario
I still believe it is the Pick Up Coil because it failed the ohm test. Im still looking for a replacement distributor to swap in to test things out.
Ray
Drifting
Joined: May 2013
Posts: 1,736
Likes: 31
From: Reno Nevada
You may have to get the small cap Camaro, and use a remote mounted coil. I've heard tell those are getting hard to find. You could just get some distributor shims, and tighten up the endplay to .010 and call it good.
Race Director
Joined: Apr 2002
Posts: 10,036
Likes: 346
From: Anaheim CA
Distributor shims are not needed. The cam gear pushes the distributor shaft up against the bottom of the distributor housing when the engine is running so the clearance there is actually zero.
Thread Starter
Pro
Joined: Aug 2010
Posts: 617
Likes: 17
From: Hamilton Ontario
**update**
Finally got around to doing some work on the car after some down time..vacation..etc.
Installed a new pick up coil and she fired right up...problem solved thanks to this forum.
The car seems to start much much quicker too...almost instantly all day long...and i used to have an intermittent "hiccup" at idle when hot...hasn't done that all day.
Would the new pick up coil have anything to do with correcting those 2 issues??
Installed a new pick up coil and she fired right up...problem solved thanks to this forum.
The car seems to start much much quicker too...almost instantly all day long...and i used to have an intermittent "hiccup" at idle when hot...hasn't done that all day.
Would the new pick up coil have anything to do with correcting those 2 issues??
