Differential Pressure Sensor?
#1
Member
Thread Starter
Join Date: Apr 2003
Location: Cedartown, Georgia
Posts: 270
Likes: 0
Received 0 Likes
on
0 Posts
Car: 86 T/A
Engine: 305
Transmission: 700-R4 Auto
Differential Pressure Sensor?
My check engine light is showing a code 34 which says I might have a defective Differential Pressure Sensor. My car is carbed. Where is this thing located?!?!!? Anyone have pics of what it looks like? And how do I go about fixing it? Also, what is the purpose of this SENSOR?
#2
Look along the firewall. The sensor should have a single vacuum line routed to it. The sensor is used to help determine engine load to adjust the fuel trim. It looks a little like this:
Last edited by Vader; 08-21-2012 at 10:31 PM. Reason: Updated image links
#3
Member
iTrader: (2)
Join Date: Aug 2005
Location: VA
Posts: 139
Likes: 0
Received 0 Likes
on
0 Posts
Car: 83 TA
Engine: 5.3
Transmission: 4L60e
I have the same code on my 87 carb...does anyone have another picture of it? I'm sure i know what it looks like, but i dont know if its to the left of the distributor or if its in the far right corner next to the BARO sensor. They both look the same to me. I cant find a vaccuum line on the one to the left of the distributor, but there is a place to put one.
However, the one next to the BARO sensor has a vaccuum line going into it.
However, the one next to the BARO sensor has a vaccuum line going into it.
#4
Supreme Member
iTrader: (7)
Join Date: May 2004
Location: Lexington, SC
Posts: 5,296
Likes: 0
Received 58 Likes
on
52 Posts
Car: 1987 SC/1985 TA
Engine: 350/vortec/fitech
Transmission: T56
Axle/Gears: 3.27 9-bolt
Baro sensor is on passenger side; MAP sensor on driver's side. They're identical except the MAP has the vaccuum line attached. Vaccuum line attaches to rear of carb and a lost/disconnected line is the most likely cause of your trouble code.
Thread
Thread Starter
Forum
Replies
Last Post
9192camaro
Engine/Drivetrain/Suspension Parts for Sale
16
02-03-2019 12:21 AM
EduardoRonaldo7
Transmissions and Drivetrain
16
09-08-2015 01:28 PM
R3500
Engine/Drivetrain/Suspension Wanted
1
08-17-2015 12:16 PM
mdtoren
Tech / General Engine
0
08-16-2015 05:45 PM