Microsquirt log question
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Teching In
Joined: Jan 2013
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From: Raleigh, NC
Microsquirt log question I'm seeing some strangeness in my logs which I'd like to get some thoughts on from some of you guys that have more fuel injection experience than I do.
This is one of the passes from this weekend...what seems strange is on the center panel...Pulse width, duty cycle, and coolant temp have these weird "fangs" ...sudden drops and then recovery. I'm seeing these in all my logs..the "good" passes to the others where it had developed a small skip down track. They don't seem to sync up with any other event to "cause" them and don't seem to effect other things such as AF ratio. Anybody have any insight?
For reference the setup is a junkyard 5.3, LS9 cam, 76mm, Microsquirt, 60lb Siemens injectors, air to water.
This is one of the passes from this weekend...what seems strange is on the center panel...Pulse width, duty cycle, and coolant temp have these weird "fangs" ...sudden drops and then recovery. I'm seeing these in all my logs..the "good" passes to the others where it had developed a small skip down track. They don't seem to sync up with any other event to "cause" them and don't seem to effect other things such as AF ratio. Anybody have any insight?
For reference the setup is a junkyard 5.3, LS9 cam, 76mm, Microsquirt, 60lb Siemens injectors, air to water.
Last edited by 1fastpickup; Jun 2, 2014 at 08:54 PM.
Thread Starter
Teching In
Joined: Jan 2013
Posts: 31
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From: Raleigh, NC
It's a 3937lb full-size truck that went 7.17@96 on this pass...so I'm pretty happy with it overall. Just trying to get the tune all figured out.
BTW - this has a "CameronVic" style intercooler setup in it!
Last edited by 1fastpickup; Jun 3, 2014 at 08:56 AM.
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From: Norn Iron
Upload the log.
But as far as coolant temp goes. Typically those sensors are fairly slow to respond, so the drops are unlikely to be accurate readings. Probably electrical interference somewhere.
Does the coolant temp wiring run near the HT leads or something ?
Using resistor plugs ?
Ecu ground and sensor ground wiring all good ?
upload the log for a better look, screenshots show so little of the overall picture.
But as far as coolant temp goes. Typically those sensors are fairly slow to respond, so the drops are unlikely to be accurate readings. Probably electrical interference somewhere.
Does the coolant temp wiring run near the HT leads or something ?
Using resistor plugs ?
Ecu ground and sensor ground wiring all good ?
upload the log for a better look, screenshots show so little of the overall picture.
