Had a scan session and now i have a question - Third Generation F-Body Message Boards

Chris Etemadi · 08-17-2003, 11:54 PM

I just noticed something while looking over my scan data The Map Volts will not go over 4.67 volts at WOT and even with the car not running the volts stay at 4.67. I was wondering If this could have any affect on performance. I would assume that under WOT I should be getting 5 Volts to the Map sensor. I think I could have possibly made a bad connection while extending the wires to the map. What would getting 4.67 volts instead of 5 volts do to performance?
Thanks in advance for the help

funstick · 08-18-2003, 12:24 AM

whats the barometer or elevation your at

Grumpy · 08-18-2003, 10:14 AM

Quote:

Originally posted by Chris Etemadi
I just noticed something while looking over my scan data The Map Volts will not go over 4.67 volts at WOT and even with the car not running the volts stay at 4.67. I was wondering If this could have any affect on performance. I would assume that under WOT I should be getting 5 Volts to the Map sensor. I think I could have possibly made a bad connection while extending the wires to the map. What would getting 4.67 volts instead of 5 volts do to performance?
Thanks in advance for the help

What is it with the key on, engine not running?.
5v at the input will probably get you a MAP voltage too high error code.

For the exact answers, would mean reading thru a commented hac of the code your running, and seeing how baro readings come into play with things.

And it takes a pretty stout motor to get to true baro, ie about 100 K/Pa, MAP readings.

Chris Etemadi · 08-18-2003, 06:40 PM

with the key on i get 4.67 volts and at WOT i get normally about 4.63 sometimes it spikes to 4.67 im not sure of my elevation but im in OKC so prolly 1500 feet above sea level