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Old 04-12-2009, 06:23 PM   #1
Eatoniashoprat
Scooby Newbie
 
Member#: 143416
Join Date: Mar 2007
Chapter/Region: W. Canada
Location: Saskatoon
Vehicle:
1971 Super Beetle
EJ20g Platinum Grey

Default EJ20g - VSS and ecu question

Hi, I've got my beetle pretty much finished up, and have only taken it for a few quick trips around the block. There were no windows in it at the time and I was just moving it from garage to driveway and vice versa so I never really got on it (still snow and with the tires on it and LSD it is impossible to drive on snow). Anyway..

First trip out, had the Z4 hooked up. Runs great, idles perfect. Took awhile of idling around for it to warm since the coolant goes all the way to the front of the car but eventually it got up to temp. With this setup it would hit a rev limit at 4500 rpm, and I'm betting it is the VSS because I don't have anything hooked up to that at the moment. So Question #1:

1. What does the ecu want to see there? 0-5V, 4 pulses per wheel revolution? Does it have to be 0-5 (gnd to 5V) or can it be 'open circuit - 5V'?

Okay, next scenario. I took the car one more time but it was even icier and I had trouble even getting moving. This time I had the Power FC hooked up with the ej20k base map that comes with datalogit. Once it learned the idle it idled fine, however I let it run for awhile, then very slowly idled it around the block, in this time my temp gauge started climbing (up to 220F) measured at the factory location and the fans cut in.

Question #2. I'm just wondering if something in the tune could actually make it run that much hotter idling around the block? I haven't even looked at the tune and compared it to the Z4 yet, haven't had time.

I've yet to put the Z4 back in and try running it because I've got it all apart to install the carpet and seats but hopefully later this week I will. Just thought I'd check here if anyone coudl give some insight. Thanks

Mike
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