Holley EFI How To: Cam and Crank Sensor troubleshooting tips and examples

[@chui19801]

This is great. Well freaking explained. I have an ongoing issue with my Ls1 , and me and my tuner have not been able to figure out what the problem is. The car only bogs right off the line WOT or when rolling on the street then to WOT. I send him a full datalog of when it happened and his suggestion was to start by replacing the crank sensor. I did replace it but have not been able to drive it again due to rain and stuff here in Jersey the past 4 days. I hope that fixes the issue.

[@alexanderknight7793]

This video helped me figure out that my cam sensor had an issue and not my crank sensor. My cars first 50 miles were great but then I mysteriously developed a rpm sync error that cause the car to fall on its face at random times mostly near 3k rpm. I checked everything with the crank sensor wiring and replaced the sensor with no luck. Everyone said it was either my crank sensor, reluctor wheel, or thrust bearings. I couldn’t settle for the idea of it being a hardware issue on a brand new TSP 14k engine. So I looked at a small diagnostic log that showed I had 0 #7 events and 120 climbing to 130 #6 events. This gave me a strong lead to check my cam wiring that I had extended since Holleys harness was about 8” short of reaching the front cam sensor (wtf Holley!!). Either way I had taken the extra slack in the cam wires I extended and tucked it up next to the alternator to make everything look good. The EMI from the alt was causing the errors since I didn’t run extra shielding . Once I moved the wires away from my alt the logs show zero errors!

[@probablyyou]

Good stuff. It lead me to the issue I had, but I wish you would've included Diag #4, when I found that and compared to the rest it verified a lost cam sensor signal.

[@ShawnDickens]

Took the Holley, Dealer, V1, V2, and V3 classes and this video is almost more help than those. Certainly more with Diagnostics types, luckily I've not had many issues with this and mostly use the RPM going to error to find the problem. Terminator X software doesn't go offline when you cycle the key and keeps trying to connect to the ECU while off, so it locks up when you shut off a new motor and go to check things or because of an issue. I tell everyone you called it Terminator because you have to open manager constantly and Terminate the software. This also kills a troubleshooting task we used with customers on the phone to see if they are losing power to the ecu. Would really love the 90's technology of selecting the folder where the Holley software works from instead of always in Documents. I want to be able to put it into a Dropbox folder or Google Drive folder. Right now you have to copy it there and if you want instant access to everything you need two copies of that on the drive. Been using this since V2 so I have about 30GB of old tunes and logs now.

[@highperformanceconsulting7616]

We have been making some improvements to the Terminator X USB communications. It should lock up much less in a future update.

[@TurboV8boi]

Thanks for the video. My car will randomly run horribly, and then sometimes it'll instantly be fine. Now I can check to see if it's cam/crank.

[@TheAkstewie]

SURE WISH HOLLY WOULD GET THERE SHIT TOGETHER AND GE TTHERE TECH LINE ONBOARD WITH BETTER DIAG LIKE THIS!

[@jonathanmoore5112]

My question is if i’m looking at the lights on the ecu both #6 and #7 should flash from blue to green correct?

[@mikejohnson386]

Thank you for this video. My bran new terminator had bad wire to cam sensor and this video helped when all 5 holley techs i talked to didnt.

[@highperformanceconsulting7616]

Glad to hear it was helpful!

[@FnaAuto]

What was bad with the wire? I’m having issues starting mine and it’ll crank and run for a few seconds then shut off and will backfire every now and then. The cam sensor is red but crank is green

[@forged_billions2]

My terminator won't even start😰

[@rodstrong01]

Mine is the same way .won't start backfires and pops will cranking

[@aplaughlin]

Can’t get mine to fire up either. Will run off starting fluid with only the crank sensor plugged in, won’t run when you plug the cam sensor back in. Really weird. Have fire and fuel. Must be wiring, signal or programming errors. Can’t figure it out!

[@RichardEngland-k6v]

Hoping you might see this, as the advice im getting from holley techs and tuners has not been helpful. new setup, and on startup it runs terrible with a rolling misfire. datalog shows diag #7 stable at "1", but Diag #6 has a very odd signal, going from 0 to 1 and back to 0 2-3 times per second. Ive completely checked the entire harness, pulled the engine to manually check timing and physical components, and went together with new sensors, new coils and even swapped injectors with no resolution. Any ideas on what could cause this?

[@jonathanmoore5929]

Hello I’m trying to figure out an issue my truck just started. I’m losing crank/cam signal at higher rpm speeds. Truck starts and runs great other than that. Looking at the log Diag 6 goes from 0.00 to 1.00 and Diag 7 goes from 0.00 to 2.00 both happening at the same time. Have any suggestions?

[@MonkeyFabGarage]

This was helpful in finding a mispinned crank sensor. Thanks for taking the time to do these. I enjoy your other stuff too.

[@jonathanmoore5112]

Great video. I looked in my help section and it looks nothing like yours. How do I fix that? I'm on 2.0 build 80

[@highperformanceconsulting7616]

The video was done using Holley efi software for HP/Dominators. All the info applies but the instructions are different between the two products. You just need to install it he Holley efi software and you reference the help in it.

[@jonathanmoore5112]

@@highperformanceconsulting7616 Thanks, I've watched other videos and couldn't figure out why they had all that information, and I didn't.

[@roadtrip942]

Diag 6 and 7 both stay at 0.00 at start up and 70second idle. Not normal I take it?

[@rodstrong01]

Im having an issue where it won't even start .it back fires and pops like the timing is off .I confirmed the cam gear is lined up and the valves are not hanging open. .can I log cranking

[@morrisrodney19]

I have issues my set is a l99 motor I removed the vvt I install a stage two c am with a 4x cam wheel . When I try to start my motor it go stall syncing back in forth . Number 6 stay blue but number 7 go blue green bulge green . But if I change my 58x to 24 x the rpm’s go to 180 I bought brand new crank also brand new cam sensor from the dealership acdelco I check everything I’m getting all the power it needs 10.45 volts while cranking

[@morrisrodney19]

I need some help I install 4 terminator max in the last moth they all work but not mine this is crazy

[@turboman351w3]

hey my friend i have a ford 351 foxbody with terminator x and my car shuts off every once in a while and i get LED LIGHT # 7 BLUE LIGHT saying GAP DETECTED what does that mean thank you so much the videos are OUTSTANDING.

[@rdy2run332]

I have the same thing going on with the terminator x did you figure it out yet?

[@josephfahler8483]

would this type of test verify mechanical timing? say one tooth off between cam/crank timing?

[@highperformanceconsulting7616]

That isn’t the intent but in some cases it can.

[@josephfahler8483]

@@highperformanceconsulting7616 thanks for the reply. Making boost, but less power than expected. Just going through the check list while i wait for boost leak testing parts. My logs look good through range of rpm. Great video

[@josepalmerin9794]

Hello I’m having Trouble with my Terminator X each time I wanna start it up the truck misfires or backfires and it’s always shows blue then red on 6 I Already replaced the sensor what can it be?

[@untouchabul47]

Have you ever seen an engine drop RPM at high rpm/load? I’m getting one count cam and 2 counts crank sensor on the error log

[@highperformanceconsulting7616]

Absolutely. They can be harder to diagnose sometimes but it’s still a cam or crank sensor losing signal momentarily for some reason.

[@lippyme9580]

i have a holley hp and did cop. just got a efi connections x58 crank trigger and cam sensor. this vidio has helped me some. cant get cam or crank sensor to show 1.00 both show 0.00. in the datalog it shows 100.7 kpa in diag6 and 29.7 lb/hr. what am i missing? i efi connections was no help. told me to call holley I have it set up in ignition lsx58X not custom. any help before i burn it to the ground? thanks

[@highperformanceconsulting7616]

Send me an email at [e-mail] with the tune and a log. I’ll take a look

[@lippyme9580]

@@highperformanceconsulting7616 ok

[@joshuaj614]

@@highperformanceconsulting7616 Have you ever seen an ecu that wont show the system on diag channel ? It runs and idles fine but soon as you give it gas it backfires thru intake . 10,11,and 12 are showing me nothing and i am set to custom .

[@TechMarcB]

is this information compatible with terminator x systems? the help file in terminator looks nothing like shown above at all.

[@GenV_Restomods]

I've got both V1 and V2 versions of X Max and I cannot find this diagnostic info anywhere in the new help files. Holley's tech line is so overwhelmed with calls that that have an attitude towards customers assuming we're the problem. At some point I'm going to do any outline and call in to my contacts upstairs and try to get them to understand that they have a lot more work on this software to get the average user up and running. We have a brand new Wegner blown 416 engine (30K) that has been dynoed and suppose to be plug and play. We have no rpm signal and no one in their organization can solve this issue. So that's why I'm trying to learn as much as possible to debug the error. I've done three X Max installs and they all have issues. Start with a base file and then work on the learn or just take it straight to a dyno and work through the data to get this stuff squared away. I do not like the whole logic in their approach and I especially don't like the harness, which has no labeling. Next time I'm going to point thumbs down on their product and use the GM factory stuff. I may have to deal with licensing cost and HP Tuners, but I can get a better result quicker.

[@michaelwittkopf39]

Excellent information!

[@TucksGarage]

So if I'm understanding this correctly, if diag #7 reads 0 constant while diag #6 reads various (from 1-10 in my log) then I have a fault in wiring or a bad sensor? Odd to me that I can get it to start without crank sensor.

[@highperformanceconsulting7616]

If diag 6 or 7 is counting up during start up then ignore it. If it’s actively counting up while the engine is running then you have a problem.

[@TucksGarage]

@@highperformanceconsulting7616 on my 3.5 screen watching rpm I see it flash error intermittently. Trying to solve that before I work on getting it to idle properly.

[@highperformanceconsulting7616]

Sounds like you have an issue then.

[@TucksGarage]

@@highperformanceconsulting7616 I really don't like just throwing parts at a project until it's fixed. Trying to learn more on how to use the datalog to narrow down the issue.

[@highperformanceconsulting7616]

Unfortunately there isn’t any magic in the diagnostics. They only help point you in a direction. Is this an LS engine?

[@hieronymus..bosch8532]

Wish i had this info when my magnetic pickup distributor was getting rf interferance .

[@antivenom454]

Thank you for puting these out. Huge help getting guys up to speed.

[@highperformanceconsulting7616]

My pleasure. I hope to start back up with them soon

[@Thelastofadyingbreed]

What if diag 6&7 read zero. Even in cranking

[@highperformanceconsulting7616]

That is fine

[@Thelastofadyingbreed]

@@highperformanceconsulting7616 diag 1 reads 1mill. During cranking light 7 flashed blue and green, 6 flashes blue rapidly. Any idea what this could be?

[@Thelastofadyingbreed]

@@highperformanceconsulting7616 just curious because the forums say so many different things which I’ve tried, to no prevail

[@highperformanceconsulting7616]

What is the actual issue you are trying to solve

[@Thelastofadyingbreed]

@@highperformanceconsulting7616 no start. Just cranks, I have fuel and proper voltage, just no start

[@dafastway3405]

A lot of people have Cam and crank issues with Holley. Must be a glitch in the system.

[@VictorGarcia-zc7xi]

Hey I’m having an issues tht I’ve been chasing for few weeks now can’t figured it out an I was looking at this video but for diag6 an 7 it shows 0 an does not move at all is tht normal?

[@highperformanceconsulting7616]

It can be normal. Without knowing more about what issue you are chasing it’s hard to say though

[@VictorGarcia-zc7xi]

@@highperformanceconsulting7616 do you have Facebook or something I can message you the issues I’m having for some reason evrytime I make a 2nd to 3rd pull truck feels lik it hits a rev limiter around 5500-5600 it just jump up an down between those rpms an nevr shifts or go up on the rpms.I got it set to shift at 6500 on 2nd to 3rd but no luck.it only does it on tht shifts1s gear it’s fine

[@highperformanceconsulting7616]

@@VictorGarcia-zc7xi You can email me at [e-mail]. If you want to attach your tune and log of the problem I am willing to take a quick look.

[@VictorGarcia-zc7xi]

Ok I will email you an a few

[@boostedthirdgenracing]

I have the same issue I was at the track. I had bad tire shake and the car shut down and it won’t start it will fire, but won’t stay running and I did a log six and seven are zero so does that mean? my cam and crank. Sensor. are working

[@havocracing6019]

Sir not today cause my wife is sleeping not feeling well. But maybe tomarr or whenever is OK with you. Is there anyway you could help me sort a few things out. I got paypall or whatever if nes. If not I understand.

[@hooligans_garage7465]

No help feature in the v2 terminator software which is about the dumbest thing ever

[@rustysausage69]

was about to say the exact same thing..

[@highperformanceconsulting7616]

Microsoft changed how it handled it’s edge browser support for pdf files. The latest terminator x software version 2 build 80 has updates to work around this and allow the help file to work again. Or you could make google chrome your default browser and the issue doesn’t exist in the first place

[@jamieknight9636]

thx mate

[@lethlbu]

Thanks for that info. I have the holley HP with a dual sync distributor and have a very intermittent no start/stall. I used your video to read a data log and found on one of the passes , on decel, my diag 7 spiked to 253, then back to zero, then back to 235 and stayed there. The car did not stall. My TPS was also degrading during the run. DM me on Instagram if you would. @lethlbu_Racing