D585 coil upgrade, now the car won't start, help please
04-28-2017, 04:20 PM
#1
D585 coil upgrade, now the car won't start, help please Hello,
Last of the spring projects was upgrading coil packs, replacing the '98 coils on my car. I got 8 brand new AC Delco D585 coils, and an adapter harness.
I installed them, and tweaked the tune (more on that in a sec), and now the car rolls over but doesn't even seem to be trying to fire. I plugged in the old harness/coils and the car starts.
I've verified fuel, and spark (at least on cylinder 2, the old spark plug to the frame test).
I've also verified the wire positions and color codes match each position on all the plugs for the adapter harness.
In the tune, I cut/pasted the values of the "Base Dwell Time" and "Base Dwell Mult" and "Powerup Initial" from a stock truck tune.
Is there anything else I should be checking?
I've already bought the parts and don't want to give up on it, but it's nice weather and I'm ready to drive it lol.
Any tips or input would be greatly appreciated.
Thanks!
Last of the spring projects was upgrading coil packs, replacing the '98 coils on my car. I got 8 brand new AC Delco D585 coils, and an adapter harness.
I installed them, and tweaked the tune (more on that in a sec), and now the car rolls over but doesn't even seem to be trying to fire. I plugged in the old harness/coils and the car starts.
I've verified fuel, and spark (at least on cylinder 2, the old spark plug to the frame test).
I've also verified the wire positions and color codes match each position on all the plugs for the adapter harness.
In the tune, I cut/pasted the values of the "Base Dwell Time" and "Base Dwell Mult" and "Powerup Initial" from a stock truck tune.
Is there anything else I should be checking?
I've already bought the parts and don't want to give up on it, but it's nice weather and I'm ready to drive it lol.
Any tips or input would be greatly appreciated.
Thanks!
04-28-2017, 04:38 PM
#2
try flipping the sub harness around one side at a time. they are very easy to flip the wrong way becuase the connectors will reach which would cause what you are experiencing. i know you say you checked the wire colors but still might be worth a shot. doesnt take but just a sec to do that trouble shoot.
04-28-2017, 04:52 PM
#4
You've gotta be f'n kidding me. I thought about switching them around, but I checked the wire colors instead.
I switched them front to back, back to front on each side like you suggested and it fired right up
Damn, I was looking at the factory harness which has:
Cyl 2/7 Red wire
Cyl 4/5 Green wire
Cyl 6/3 Blue wire
Cyl 8/1 Purple wire
The new harness, the colors are opposite direction...
Oh well, today's my turn to wear the dunce cap.
Thanks for helping out
I switched them front to back, back to front on each side like you suggested and it fired right up
Damn, I was looking at the factory harness which has:
Cyl 2/7 Red wire
Cyl 4/5 Green wire
Cyl 6/3 Blue wire
Cyl 8/1 Purple wire
The new harness, the colors are opposite direction...
Oh well, today's my turn to wear the dunce cap.
Thanks for helping out
04-28-2017, 09:34 PM
#7
So far I've only fired it up and washed it for a car show tomorrow. But this was the last planned upgrade before getting it back to the local track. Hopefully, I can turn it up now. I'm pretty psyched, it's been 7 years since its been race ready!
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04-29-2017, 09:06 AM
#11
I'm not sure what I'd do. I thought about running some ProForm valve covers to clean things up a little and the D281 coils, but I don't think they are much of an upgrade.
I've also thought about the Pantera coils. But for now, I think the stock coils will work with lower boost. It's when I turn it up that I may want to increase the gap and run a more powerful coil.
I've also thought about the Pantera coils. But for now, I think the stock coils will work with lower boost. It's when I turn it up that I may want to increase the gap and run a more powerful coil.
04-29-2017, 10:01 AM
#12
Hello,
Last of the spring projects was upgrading coil packs, replacing the '98 coils on my car. I got 8 brand new AC Delco D585 coils, and an adapter harness.
I installed them, and tweaked the tune (more on that in a sec), and now the car rolls over but doesn't even seem to be trying to fire. I plugged in the old harness/coils and the car starts.
I've verified fuel, and spark (at least on cylinder 2, the old spark plug to the frame test).
I've also verified the wire positions and color codes match each position on all the plugs for the adapter harness.
In the tune, I cut/pasted the values of the "Base Dwell Time" and "Base Dwell Mult" and "Powerup Initial" from a stock truck tune.
Is there anything else I should be checking?
I've already bought the parts and don't want to give up on it, but it's nice weather and I'm ready to drive it lol.
Any tips or input would be greatly appreciated.
Thanks!
Last of the spring projects was upgrading coil packs, replacing the '98 coils on my car. I got 8 brand new AC Delco D585 coils, and an adapter harness.
I installed them, and tweaked the tune (more on that in a sec), and now the car rolls over but doesn't even seem to be trying to fire. I plugged in the old harness/coils and the car starts.
I've verified fuel, and spark (at least on cylinder 2, the old spark plug to the frame test).
I've also verified the wire positions and color codes match each position on all the plugs for the adapter harness.
In the tune, I cut/pasted the values of the "Base Dwell Time" and "Base Dwell Mult" and "Powerup Initial" from a stock truck tune.
Is there anything else I should be checking?
I've already bought the parts and don't want to give up on it, but it's nice weather and I'm ready to drive it lol.
Any tips or input would be greatly appreciated.
Thanks!
04-29-2017, 04:24 PM
#13
I'm using the Proform LS covers myself, but Proform doesn't make mounts for the D585's to work with their rails so I made a set myself. Round 1 pointed out some flaws, but they're good enough until I can make a revised set.
Easy to make to fit Proform bolt points, 14" long, 2.5" flat until the bend (45 degrees", and then just the fingers to the coil mounting holes.
Easy to make to fit Proform bolt points, 14" long, 2.5" flat until the bend (45 degrees", and then just the fingers to the coil mounting holes.
04-29-2017, 04:29 PM
#14
BUICK RAINIER 2004
CADILLAC ESCALADE 2002-2006
CHEVROLET AVALANCHE 1500 2002-2006
CHEVROLET EXPRESS 1500 2003-2007
CHEVROLET EXPRESS 2500 2003-2007
CHEVROLET EXPRESS 3500 2003-2007
CHEVROLET SILVERADO 1500 1999-2006
CHEVROLET SILVERADO 1500 CLASSIC 2007
CHEVROLET SILVERADO 2500 1999-2006
CHEVROLET SILVERADO 2500 CLASSIC 2007
CHEVROLET SILVERADO 3500 2001-2006
CHEVROLET SILVERADO 3500 CLASSIC 2007
CHEVROLET SSR 2003-2004
CHEVROLET SUBURBAN 1500 2000-2006
CHEVROLET SUBURBAN 2500 2000-2006
CHEVROLET TAHOE 2000-2006
CHEVROLET TRAILBLAZER 2003-2004
GMC ENVOY 2003-2004
GMC SAVANA 1500 2003-2007
GMC SAVANA 2500 2003-2007
GMC SAVANA 3500 2003-2007
GMC SIERRA 1500 1999-2006
GMC SIERRA 1500 CLASSIC 2007
GMC SIERRA 2500 1999-2006
GMC SIERRA 2500 CLASSIC 2007
GMC SIERRA 3500 2001-2006
GMC SIERRA 3500 CLASSIC 2007
GMC YUKON 2000-2006
GMC YUKON XL 1500 2000-2006
GMC YUKON XL 2500 2000-2006
HUMMER H2 2003-2007
ISUZU ASCENDER 2003-2004
They are supposed to be rated among the highest spark energy delivered for common coil packs. Running forced induction, I figured I'd do it once and be done. I won't know how well they actually perform until I can get the car back down to the tuners to start leaning on it.