Auto Hobbyist DAQ setup?

I'm thinking about making a laptop-based DAQ system for monitoring the behavior of some systems on my car. The point is to monitor and log a few values at once while keeping my eye on the road. I suspect the ECUs on this car get flaky, and I'd love to trace down the source of the problem. I think I'll lose interest if this project costs me more than $200 total.

This requires:

- sensing absolute pressure from 0 to 3 Bar.

- 3-5% accuracy would be fine. I won't need to log many hours with this thing running, either.

- sensing voltages (DC and duty-cycle signals) from the ECU pinouts, 0-15v, with a max rate of about 1kHz. (Hence, 2-5kS/s sampling, which isn't asking much these days). Duty cycle output frequencies are on the order of 1kHz.

- total of 2-3 pressure sensors and 2-3 voltage sensors, with a minimum of 3 at once. Of course more would be better.

- interface to the cheap laptop, preferably with no programming and additional software needed. I see many USB devices, and though the laptop is really old (Pentium 200MHz), I can get a PCMCIA USB card for $12.

I found a nice DAQ unit

which leaves $100 for buying sensors.

1) The DAQ units I see are 0-4V and -10 to 10V. I will be reading a range of 0-15v. What's the best way to handle this? 2) What kind of sensors should I get, and how will I power them? (of course, I have 12v available). I could probably buy some old MAP sensors from the junkyard, or is there are cleaner way? 3) Any other tips? I'm a mechanical engineer, so the cheapest/easiest way to logging my values is what I value most.

Thanks for any advice,

Dave