D3PE fan users
#1
Instructor
Thread Starter
D3PE fan users
Anyone notice your voltage gauge and digital readout jumping around after fan install? Mine does, and if I pull the fan fuse it goes back to normal. I'm about to hook up the scope and figure out what's going on.
#2
Race Director
Member Since: May 2004
Location: Raleigh, NC
Posts: 16,664
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St. Jude Donor '15
What alternator are you running?
I can only assume those fans pull a decent amount of current..
I can only assume those fans pull a decent amount of current..
#3
Instructor
Thread Starter
Stock alternator. Not the problem though.
At the alt. and battery voltage is stable with a meter. With the scope, it's a different story though. The fan motors are producing voltage spikes every time the solid state relay turns off and on (150v for 15m/s long). This noise is causing the ecu to have false voltage readings. I'm betting this will cause problems with injector voltage offsets. I jumped the fans straight to the battery.
Gauge and digital readout are stable again. I have a few ford pwm cooling fan modules I'm going to wire up tomorrow. They're like the c6 module, just easier to come by and more like a motor controller than a ssr.
At the alt. and battery voltage is stable with a meter. With the scope, it's a different story though. The fan motors are producing voltage spikes every time the solid state relay turns off and on (150v for 15m/s long). This noise is causing the ecu to have false voltage readings. I'm betting this will cause problems with injector voltage offsets. I jumped the fans straight to the battery.
Gauge and digital readout are stable again. I have a few ford pwm cooling fan modules I'm going to wire up tomorrow. They're like the c6 module, just easier to come by and more like a motor controller than a ssr.
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MLRS (07-29-2016)
#6
Instructor
Thread Starter
Success! Ford modules installed and work great. I used one for each fan. They're rated at 60 amps, so no problems there. Voltage is stable and back to normal. Also, these modules have a soft start and put out 100% power at 90% pwm. So no programming needed.
#7
Team Owner
Tons of users using these and first person with this problem. I wonder if you have a borderline charging system or a bad pwm relay from d3. I've seen plenty of these installed with no issues.
#9
P/N or application on these Ford PWM Modules?
Thanks,
DJ
Thanks,
DJ
#10
Instructor
Thread Starter
#12
Instructor
Thread Starter
#14
Melting Slicks
#15
Instructor
Thread Starter
#16
#19
Instructor
Thread Starter
FYI. I drove my friend's ZR1 today. It has D3PE fans on it also. The voltage gauge does the same thing my car did. Jumps around and not stable.
#20
Had mine installed it's doing the same thing I'm not happy with there reply when I contacted them they stated I might need to upgrade the alternator. Definitely there is a problem.