Holley HP won't spark

G

Goatpoker

Member
Nov 18, 2021
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Just finished wiring up my HP and I am not getting any spark. Has anyone had an issue with low RPM cranking not letting the Crank Sync with the Cam?

I checked all the sensors and wires and its hooked up ok. I have a Hi-torque starter on a VW flywheel. LS3
 
Thanks, relay is working as the fuel pump is running.

Looks like the crank sensor is dropping out... brand new motor from GM, but not a Delco sensor
 
Is it cranking fast? There's a min crank speed for most cam/crank sensors.

Otherwise: sensor is getting constant power/ground? If so, sensor might be brand new shit.
 
Just did some trouble shouting with Holley and there is not enough RPM.

It's a VW bellhousing with a hi-torq starter... not sure I can get any more RPM. Has anyone had this issue before?
 
This setting should be the same in the HP software...it was mentioned several times to adjust in forums I was reading when I had a similar issue with no spark,,,try moving the RPM down a bit. One other issue - the red wire that says run straight to the battery - make sure it is, and not through a relay, fuse, etc.

1734715377031.png
 
I was chasing an issue with a fueltech starting issue, fueltech instructions call for cam sync to use the 5v but in further tech and reading we were instructed to use 12/16v for cam sync if we had a weak signal. Not sure about Holley though
 
wesinls said:
This setting should be the same in the HP software...it was mentioned several times to adjust in forums I was reading when I had a similar issue with no spark,,,try moving the RPM down a bit. One other issue - the red wire that says run straight to the battery - make sure it is, and not through a relay, fuse, etc.

View attachment 133053
Click to expand...
This is minimum RPM to start. Might help, but I think he's having an issue where the sensor itself isn't reading because it's spinning too slow.

Goatpoker said:
Just did some trouble shouting with Holley and there is not enough RPM.

It's a VW bellhousing with a hi-torq starter... not sure I can get any more RPM. Has anyone had this issue before?
Click to expand...
Which model? There are a bunch:

Race Ready Products > Imi Hi Torque Vw Starter

www.racereadyproducts.com www.racereadyproducts.com

Probably need an N model to spin fast enough.
 
what is the actual crank RPM? anything over 100 should be fine. pull the plugs, shut off the fuel and crank it over. if it does not synch, you have a sensor or wiring issue that needs to be addressed before anything.
 
wesinls said:
This setting should be the same in the HP software...it was mentioned several times to adjust in forums I was reading when I had a similar issue with no spark,,,try moving the RPM down a bit. One other issue - the red wire that says run straight to the battery - make sure it is, and not through a relay, fuse, etc.

View attachment 133053
Click to expand...
I thought that is what that parameter did too, but from the manual it looks like the crank to run only changes when the timing starts to follow the timing table.

"CRANKING PARAMETERS
Cranking Timing: This is the actual commanded timing when the engine is below the Crank to Run RPM. Base parameters of 10-15 degrees and 400 RPM are good for 99.9% of applications. The cranking timing parameter is active for any application using ECU timing control.
Crank to Run RPM: Maximum RPM at which the Cranking Timing parameter deactivates"
 
Travelah said:
I thought that is what that parameter did too, but from the manual it looks like the crank to run only changes when the timing starts to follow the timing table.

"CRANKING PARAMETERS
Cranking Timing: This is the actual commanded timing when the engine is below the Crank to Run RPM. Base parameters of 10-15 degrees and 400 RPM are good for 99.9% of applications. The cranking timing parameter is active for any application using ECU timing control.
Crank to Run RPM: Maximum RPM at which the Cranking Timing parameter deactivates"
Click to expand...
Ya...it never fixed my problem but for whatever reason on random forums it would be something people would suggest often. My bad for suggesting it as it looks to be bad advice.
 
Run a diagnostic, is the cam sensor working look to see if it turns green on crank
 
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