Crank Angle Sensor replacement help please!
#1
Junior Member
Thread Starter
Join Date: Jul 2010
Location: Charlotte,NC
Posts: 32
Likes: 0
Received 0 Likes
on
0 Posts
Crank Angle Sensor replacement help please!
Does anyone know how to change the CAS? If so, i would greatly appreciate any help with this! Is this something i should try an tackle myself or leave it for the dealership to charge something rediculous? Any help is appreciated!
How could i get ahold of a service manual that may show me how to do this in a pdf form? Thanks guys.
How could i get ahold of a service manual that may show me how to do this in a pdf form? Thanks guys.
#3
Junior Member
Thread Starter
Join Date: Jul 2010
Location: Charlotte,NC
Posts: 32
Likes: 0
Received 0 Likes
on
0 Posts
The dealership told me one was failing. So im replacing both with the ones i found on ebay for 45 bucks. All symptoms were there too so im pretty sure this is it.
#4
rotorhead
iTrader: (3)
You took a single turbo FD (the one in your sig) to a dealership? What are the symptoms? What is your full list of modifications?
Crank angle sensors don't fail on these cars. Now I'm sure somebody somewhere on the internet may say that his CAS failed but in your case it is most likely a mis diagnosis from someone who doesn't know much about modified Rx-7's.
Tell me, what are the symptoms of a bad CAS on an FD? I've NEVER SEEN IT HAPPEN. EVER. Maybe if you took a sledge to one...
Crank angle sensors don't fail on these cars. Now I'm sure somebody somewhere on the internet may say that his CAS failed but in your case it is most likely a mis diagnosis from someone who doesn't know much about modified Rx-7's.
Tell me, what are the symptoms of a bad CAS on an FD? I've NEVER SEEN IT HAPPEN. EVER. Maybe if you took a sledge to one...
#5
Junior Member
Thread Starter
Join Date: Jul 2010
Location: Charlotte,NC
Posts: 32
Likes: 0
Received 0 Likes
on
0 Posts
Only because it was close and it had to be towed. The symptoms ive experienced are shaking while idleing, smoke, sounds like its bogging kind of when revving up and wont stay idleing. In case its not the CAS is why im trying to figure out how to do it by myself because im not paying these guys 250 to put them on if its a fairly basic repair. We will know monday or tuesday if this is the prob or not for sure. What do you suppose it is?
Trending Topics
#9
Urban Combat Vet
iTrader: (16)
Just a thought.....on your firewall, just behind the throttlebody there is a small black sensor just over 1 inch square labeled "sensor boost". It should have a single small vacuum hose going to it directly from a nipple on the passenger side of the intake manifold. Make sure that hose is in place at both ends.
#12
Senior Member
iTrader: (1)
To Change the sensors:
I'm with these guys that it is unlikely these sensors are the problem. however they are not too hard to get to.
http://s1012.photobucket.com/albums/...t=IMG_1979.jpg
- Remove both drive belts.
- Disconnect Neg. bat. terminal
- Remove Idler pully assembly
- Remove the E-shaft pullies and trigger ring. Do not remove E-shaft center bolt; the pullies will come off by removing the four 6mm bolts and the E-shaft lock plate.
- You should be able to get to the two electrical connectors on the sensors. Make sure the connectors are identified as to their sensor; they are two different colors.
- Remove the two 6mm bolts holding the sensors and remove the sensors.
- Reassembly is the reverse. Make sure the trigger wheel is correctly on it's pins and the pulleys also seat over their pins before installing and tightening the four bolts.
I'm with these guys that it is unlikely these sensors are the problem. however they are not too hard to get to.
http://s1012.photobucket.com/albums/...t=IMG_1979.jpg
#14
Original Gangster/Rotary!
iTrader: (213)
You're wasting your time if you replace the CAS based on those symptoms.
At the shop we had a car that usually wouldn't start, and when it would run it would spontaneously shut down. Aside from this, it idled fine while it ran. Ended up being bad wiring at one of the CAS connectors on the original wiring harness.
At the shop we had a car that usually wouldn't start, and when it would run it would spontaneously shut down. Aside from this, it idled fine while it ran. Ended up being bad wiring at one of the CAS connectors on the original wiring harness.
#16
In the Garage
iTrader: (2)
Cleverly posted on this site. PDF searchable format. https://www.rx7club.com/showthread.p...ght=searchable post #10 is the money post.
ttmott pretty much summed it up. They are easy to get to.
That said, have you checked the map sensor yet? That was my first thought as well, and I also agree you should take the car to a known good rotary mechanic to have them diagnose this issue for you. I am not saying it isnt the cas, but it is a bit of a stretch.. <-- Just like 3 very knowledgeable rotary mechanics have already suggested..
ttmott pretty much summed it up. They are easy to get to.
That said, have you checked the map sensor yet? That was my first thought as well, and I also agree you should take the car to a known good rotary mechanic to have them diagnose this issue for you. I am not saying it isnt the cas, but it is a bit of a stretch.. <-- Just like 3 very knowledgeable rotary mechanics have already suggested..
#18
Junior Member
Thread Starter
Join Date: Jul 2010
Location: Charlotte,NC
Posts: 32
Likes: 0
Received 0 Likes
on
0 Posts
Is this map sensor and sensor boost the same thing? If so ive checked i unplugged it and plugged it back in and checked the hose everything is good. Problem still continues. Thanks for the help guys i trust you all more than the dealership so im going to pull the car out and get the cas switched since i already bought the new ones but ill keep u guys posted .
#19
dorito powered
iTrader: (5)
Join Date: Mar 2008
Location: Lincoln, NE
Posts: 2,839
Likes: 0
Received 0 Likes
on
0 Posts
the map sensor is the thing that's plugged into part of the harness on the firewall, has a vacuum hose and 3 wires coming out of it. I would check to make sure the hose attached at BOTH ends and isn't t'd into something and not plugged into some random nipple. Some of the vacuum nipples are just passthroughs and aren't open to the inside of the intake manifold.
#21
Junior Member
Thread Starter
Join Date: Jul 2010
Location: Charlotte,NC
Posts: 32
Likes: 0
Received 0 Likes
on
0 Posts
#25
Full Member
iTrader: (6)
Only because it was close and it had to be towed. The symptoms ive experienced are shaking while idleing, smoke, sounds like its bogging kind of when revving up and wont stay idleing. In case its not the CAS is why im trying to figure out how to do it by myself because im not paying these guys 250 to put them on if its a fairly basic repair. We will know monday or tuesday if this is the prob or not for sure. What do you suppose it is?
Red
White
Yellow
Obviously you'd put one meter lead at the big yellow plug and the other on a CAS plug. Then check for continuity.