holley hp efi help
today i was dickin round with it and turned off the cam sensor. then got it running and decided to start from a stock fuel map, got out on the road and jarred it pretty good, got thru first and into secoond then the car lost all power and shut off , it blew the fuel pump fuse, im wondering if my fuel setup may be the cause of my problems, i still have no idea why it blew the fuse, im pulling out of the original sender in the top of the tank, from a holley billet fuel pump, maybe im getting air or something is why my afr is goin apeshit, but again i have no idea why it bleew the fuse put a new one in it and it started right back up and i drove home
I had a Holley tech on the phone the other day to discuss various things and one topic was this starting/cranking time/dwell topic. All guidance given here was agreed to except choosing rising instead of falling. He said that "rising is a dirty signal, falling is always clean", and thus told me to pick falling instead.
For no other reason offering their $0.02 on the topic, I felt I should share in this thread..
TJ
For no other reason offering their $0.02 on the topic, I felt I should share in this thread..
TJ
I just switched my stock coils out for the Holley coils and the car wouldn't start. I switched the dwell time from 1.8msec to 5msec and it started as soon as I touched the key. Thanks for all the info guys.
I would Highly Recommend Turning down your dwell time back to 1.8ms
you will fry those coils by leaving it at 5.0ms
figure out where your real issue is instead of a band aid of a huge dwell time.
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Verdad Gallardo I turned it down. I jumped the gun on the dwell time fix. I bought the unit used and it appears the guy had the coils labelled wrong so the firing order was off. Going to try it again in a second with the dwell time down and the firing order fixed.
Is that just Holley brand coils or will the long dwell hurt stockers too?
Teching In
Joined: Jan 2012
Posts: 9
Likes: 0
Confirming how to change the dwell time I have a 5.3 with the stock truck coils, that slow starts too. I'd like to up the dwell time on the coils to see if this helps. Currently I have the base LSX 24x setup.
If I swtich to Custom:
Do I leave timing offset at 0 degrees?
Cam Sensor: LSx 4X or Single pulse? (I want to keep Sequential injection)
If Single pulse, Sensor type :Rising or Falling?
Output Setup: Type: DIS coil on plug then Dwell to 5.0msec?
I want to make sure I set this up correctly. Thank you any help in this matter.
If I swtich to Custom:
Do I leave timing offset at 0 degrees?
Cam Sensor: LSx 4X or Single pulse? (I want to keep Sequential injection)
If Single pulse, Sensor type :Rising or Falling?
Output Setup: Type: DIS coil on plug then Dwell to 5.0msec?
I want to make sure I set this up correctly. Thank you any help in this matter.
Last edited by Buck-Strickland; Sep 9, 2012 at 12:07 AM.
