boost guage not working.
#1
Senior Member
Thread Starter
Join Date: Apr 2002
Location: Duluth, MN
Posts: 419
Likes: 0
Received 0 Likes
on
0 Posts
boost guage not working.
When I bought the car the boost guage worked fine. I had to take the turbo and mani out to replace some gaskets down there, because of a leak. Got everything up and running...idling around 1500-2k now though =/. But anyways, I noticed my boost guage dosnt work now... anyone got ideas? maybe I hooked some hoses up wrong or something? What affects this and what should I go double check to see if its hooked up right. I am assuming I just hooked something up wrong because it did work before I took the stuff apart. Just give me some ideas and I will try them tomorrow and give some feedback thanks.
#2
I'm a boost creep...
Join Date: Jan 2002
Location: Auckland, New Zealand
Posts: 15,608
Likes: 0
Received 8 Likes
on
8 Posts
When you say not working, do you mean it sits at the bottom of the gauge and never moves, or does it pop up to zero when you turn the ignition on but doesn't move from there?
The boost gauge takes its reading from the manifold pressure sensor on the front of the RHS strut tower. Check to make sure the electrical plug is secure and no wires are broken, and check that the vac line is plugged into the sensor and the manifold.
The boost gauge takes its reading from the manifold pressure sensor on the front of the RHS strut tower. Check to make sure the electrical plug is secure and no wires are broken, and check that the vac line is plugged into the sensor and the manifold.
#5
Senior Member
Thread Starter
Join Date: Apr 2002
Location: Duluth, MN
Posts: 419
Likes: 0
Received 0 Likes
on
0 Posts
I just looked for to see if the vacuum hoses were hooked up. It all looks pretty good. The hose that comes from the pressure sensor that is suppose to go to the ACV isnt attached because I have no ACV anymore... The hose is just closed off.
Is there any way to tell if the sensor is working? I will peak around the electrical work after work today
Is there any way to tell if the sensor is working? I will peak around the electrical work after work today
#6
Senior Member
Thread Starter
Join Date: Apr 2002
Location: Duluth, MN
Posts: 419
Likes: 0
Received 0 Likes
on
0 Posts
I am at work right now on break so I cant check stuff on the car. But on the way to work today I remeber the actuator that connects to the manifold was pretty hard to get the rod to move... i remember reading in the haynes manual that it is suppose to move freely. Also the flap that the actuator moves inside of the manifold didnt want to move freely.
But I wasnt sure at the time if it was suppose to be like that or not. I checked my old cracked manifold and seen that it moves pretty easly. Since I think all of that is cnnected to boost some way or another I was thinking that would be the problem, but now that I think about it... I am pretty sure my guage would atleast move to 0psi...it is just sitting there not moving at all. So I am thinking it is some electrical problem??? Im I assuming right here? Also if those flaps on the manifold dont move easly could that cause something else? another problem maybe?
But I wasnt sure at the time if it was suppose to be like that or not. I checked my old cracked manifold and seen that it moves pretty easly. Since I think all of that is cnnected to boost some way or another I was thinking that would be the problem, but now that I think about it... I am pretty sure my guage would atleast move to 0psi...it is just sitting there not moving at all. So I am thinking it is some electrical problem??? Im I assuming right here? Also if those flaps on the manifold dont move easly could that cause something else? another problem maybe?
Trending Topics
#8
Alcohol Fueled!
iTrader: (2)
Dude, mine works when it feels like it. I checked the signals when the gauge wasnt working, and the signal was still there.
Ive seen 3 or 4 TIIS with malfunctioning boost gauges and have come to the conclusion that its a problem with the dash.
Take the dash out and clean the contacts.
Jarrett
Ive seen 3 or 4 TIIS with malfunctioning boost gauges and have come to the conclusion that its a problem with the dash.
Take the dash out and clean the contacts.
Jarrett
#13
Senior Member
Thread Starter
Join Date: Apr 2002
Location: Duluth, MN
Posts: 419
Likes: 0
Received 0 Likes
on
0 Posts
lol yeah..I got a aftermarket boost guage sitting here... But I would liek to make sure its working properly before I hook that up yeah know. anyways I have to go to my 2nd job..I will try to look around a bit tonight..maybe I just have a loose connection. I have a 6mb movie just havnt figured out where to upload it...can someone do that for me?
#16
Senior Member
Thread Starter
Join Date: Apr 2002
Location: Duluth, MN
Posts: 419
Likes: 0
Received 0 Likes
on
0 Posts
So If the guage isnt even moving at all... Could it still be some electrical thign to the boost sensor? Or even if that wasnt working the guage would atleast move to 0 or so?? I am assuming since it dosnt move at all, it is some electrical problem with where the guage is..maybe a ground or something. Is all the electrical to the guage...ground and positive behind the dash?
#17
I'm a boost creep...
Join Date: Jan 2002
Location: Auckland, New Zealand
Posts: 15,608
Likes: 0
Received 8 Likes
on
8 Posts
Originally posted by Husemoller
The hose that comes from the pressure sensor that is suppose to go to the ACV isnt attached because I have no ACV anymore... The hose is just closed off.
The hose that comes from the pressure sensor that is suppose to go to the ACV isnt attached because I have no ACV anymore... The hose is just closed off.
You risk engine damage not having the manifold pressure sensor working. The ECU uses it to retard timing under boost. You need to reconnect that hose immediately. Tee it into the BOV line, and make sure the little restriction "pill" is still in the line.
#19
Senior Member
Thread Starter
Join Date: Apr 2002
Location: Duluth, MN
Posts: 419
Likes: 0
Received 0 Likes
on
0 Posts
Ahhh I see... I havnt ran it much at all since I realized it wasnt working just incase I did hook up something wrong or nothing at all. I will go pick up a T somewhere...no idea where but I will find one. And yeah I see the restricter pill thing...
Also I hook up an aftermarket boostguage to that line too couldnt I?
Anyone know places that sell Ts? menards, homedepot?? auto shops??
The pill he speaks of, is located on the hose that goes from the pressure sensor. That is located on the passenger side strut tower. Its a little black box. The hose should be connected to your ACV if you still have it. there should be a little metal pill looking thing that looks like its crimped. That is the pill he is talking about.
Also I hook up an aftermarket boostguage to that line too couldnt I?
Anyone know places that sell Ts? menards, homedepot?? auto shops??
The pill he speaks of, is located on the hose that goes from the pressure sensor. That is located on the passenger side strut tower. Its a little black box. The hose should be connected to your ACV if you still have it. there should be a little metal pill looking thing that looks like its crimped. That is the pill he is talking about.
Last edited by Husemoller; 10-08-03 at 01:42 AM.
#20
I'm a boost creep...
Join Date: Jan 2002
Location: Auckland, New Zealand
Posts: 15,608
Likes: 0
Received 8 Likes
on
8 Posts
The pill is a little plastic orrifice inside the vac line. You can't see it, but Mazda put a little paint dot on the line where it's located. It's at the manifold end of the line. You'll feel it when you squeeze the line.
#21
Senior Member
Thread Starter
Join Date: Apr 2002
Location: Duluth, MN
Posts: 419
Likes: 0
Received 0 Likes
on
0 Posts
hmm weird...my hose has a little pill looking thing that is crimped....Thats why I really never hooked it up. Thought they just did that to block it off because the airpump and such was gone. Oh well...thanks for the help NZ.
#24
I'm a boost creep...
Join Date: Jan 2002
Location: Auckland, New Zealand
Posts: 15,608
Likes: 0
Received 8 Likes
on
8 Posts
It stops pressure spikes tripping fuel cut too early. Many people who've replaced the vac line and not swapped the pill over have reported hitting fuel cut at very low boost.
Thread
Thread Starter
Forum
Replies
Last Post
rgordon1979
3rd Generation Specific (1993-2002)
40
03-15-22 12:04 PM
The1Sun
1st Generation Specific (1979-1985)
7
09-18-15 07:13 PM