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CEL - P0100 - Volume Air Circuit Malfunction

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talon4show

15+ Year Contributor
124
1
Feb 17, 2005
Pensacola, Florida
Ok, not too much of a n00b here but I can't figure this out. I'll try to provide as much information as possible. Need any other stuff just ask, I should know.

1995 Car, 1990 6-bolt motor, 1995 2G head

Just got the car running on the newly built motor so this problem is kind of a big problem for me. Got a Check Engine Light obviously. Through DSMlink I see P0100 Volume Air Circuit. This is causing to car to run VERY rich, stutter, pop, and buck. Obviously this can't be happening with a brand new motor because I don't want to wash the rings out.

Checked TPS....its fine.
Checked for vacuum leaks...none.
Replaced the 2G MAS...same thing.

Some information that may help:
-Motor has maybe 3 miles on it so far
-Running DSMlink (as stated above)
-Sheet Metal Intake Manifold so there is no MDP Sensor on the car
-Have DSMlink set for the PLX to read off the MDP signal
-Car idles at first mid 14s and then goes from 10.5s to RICH on my PLX-M300.
-FIC 650s/walboro255/Fuel Pressure Regulator/stock fuel rail and lines/no rewire.

DSMlink settings:
-I believe its called the "global" and that is at 180 and all other settings are at 0 right now.

Going to make a boost leak tester some time this week and try that out but that would have to be one heck of a boost leak huh?

Thoughts? Ideas?
 
Bump! Anyone?

No MDP in on the car right now but I know people have done 6bolt swaps with 1G intake manifolds and run fine without it.

Would the IAC cause this? Something about a FIAV being stuck open?
 
Thanks for the link! I tried another MAS already and nothing changed. I want to try another just having some trouble locating one in town. Also need to check the wiring for continuity I guess. Its gotta' be MAS related...
 
Problem Solved! Went to checking the ECU Pinout and saw a wire for Volume Air Sensor (#90). Looked down at the ECU and the wire was cut from when I took the SAFC out and never reconnected. Doh!
 
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