SPONSORED LINKS

1994 Chevy S-10 MAP sensor

Tiny
JMICHAEL8888
  • MECHANIC
  • 1994 CHEVROLET S-10
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 165,000 MILES
My truck is a CMFI fuel system. I got this truck from my brother and it has always run poorly (low power). My question is would a map sensor vlotage reading of 3.8v at idle be causing my computer to think it has low vacuum?Or be causing it to run weak. A vacuum test shows a steady 18.5psi acceleration test normal.
SPONSORED LINKS
Wednesday, December 3rd, 2008 AT 9:07 PM

1 Reply

Tiny
RACEFAN966
  • MECHANIC
  • 5,029 POSTS
Ok the voltage for map sensor should be 1 to 2 volts at idle and at wide open throttle it should be 4 to 4.8 volts. So if it is showing 3.8 volts at idle then it would think it is at wide open throttle and give more fuel which would give you poor mileage and poor performance.
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Wednesday, December 3rd, 2008 AT 9:47 PM

Please login or register to post a reply.

Related MAP Sensor Content

VIEW MORE

Sponsored links