Jamie_mk1 Posted January 21, 2023 Report Share Posted January 21, 2023 Hello I am having trouble getting my Zetec (ST170 - zetec engine but with VVT on inlet cam) to start. There seems to be no signal on trigger 2, which I believe is the problem. I am trying to identify if this is a wiring issue, a sensor problem or something else. MAP, log and trigger log attached. Can anybody please give some advice? New to programmable ECU's so hoping its something obvious :-D Thanks, Jamie TriggerScopeLog 120123.llgx PC Datalog - 2023-01-4 1_01_03 pm.llgx original map JR TEST 2.pclx Quote Link to comment Share on other sites More sharing options...
Adamw Posted January 21, 2023 Report Share Posted January 21, 2023 Ok, so first just a quick bit of info about the trigger scope in this ecu so you know what to expect. Your Monsoon is an early one that didnt have the full analog triggerscope hardware (V2.4), so the parameters "Trigger Scope 1/2" which would usually show the raw voltage on the trigger pin in later ecu's arent connected to anything in your ecu so we need to ignore these. What we have to work with are the parameters "Trig1/2 Signal" - these are a representation of the signal that is reaching the main micro controller after they have been passed through the trigger conditioning circuit. So if you dont see a "Trig2 Signal", it doesnt necessarily mean there is no signal - it could mean the signal just didnt make it through the conditioning circuit. For example if the trigger 2 voltage didnt meet the trig 2 arming threshold then the conditioning circuit wouldnt allow it through so you would see no "trig 2 signal" in your scope capture. Many ford cam sensors output very low voltage when cranking so that would be my first thought, try dropping your trig 2 arming threshold to match the example below and see if we get a signal then. The second problem I see is your trigger 1 appears to be incorrect polarity as there is a falling edge right in the middle of the "missing tooth" gap. So swap the +/- wires at the crank sensor plug. Quote Link to comment Share on other sites More sharing options...
Jamie_mk1 Posted January 22, 2023 Author Report Share Posted January 22, 2023 Thanks for the quick response Adam. I updated the arming threshold table as you recommended and it is now saying it has a signal. I couldn't swap the wires at the crank sensor plug just yet as I didn't have a pin removal tool (the dealer supplied the ECU and loom but isn't being very helpful). Pin removal tool on order I gave it a quick try to see if it would fire at all but still nothing, so I recorded a new log. Not sure if it is down to the crank sensor wiring though? PC Datalog - 2023-01-22 3;20;47 pm.llgx Quote Link to comment Share on other sites More sharing options...
Adamw Posted January 22, 2023 Report Share Posted January 22, 2023 Can you do another trigger scope while cranking. The ecu is not commanding any dwell so that suggests it is still not happy with something about the trigger but Im not convinced it is the crank sensor or only the crank sensor. Quote Link to comment Share on other sites More sharing options...
Jamie_mk1 Posted January 22, 2023 Author Report Share Posted January 22, 2023 Sure thing, attached. TriggerScopeLog220123.llgx Quote Link to comment Share on other sites More sharing options...
Adamw Posted January 22, 2023 Report Share Posted January 22, 2023 Thanks, I can confirm it is just the crank sensor polarity that it isnt happy with. Cam pattern looks correct now and matches what the ecu expects for the duratec trigger mode. Quote Link to comment Share on other sites More sharing options...
Jamie_mk1 Posted January 23, 2023 Author Report Share Posted January 23, 2023 Changed the wires around, now have spark. Thanks for the help Adam! Quote Link to comment Share on other sites More sharing options...
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