Confused? cps or cid sensor

[buechine]

My car starts to misfire after a while. I changed the spark plugs and wires and it still does it. The car seems to buck and I'm not too sure even after reading their descriptions what is the main culprit the Crankshaft position sensor or the Camshaft position sensor. I think that the Crankshaft sensor looks like a real big job but how is the camshaft sensor to replace? The car is an 89 model, no modifications.

 

[SHOPhear95]

Mine does the same thing, as it goes into overdrive it starts to misfire after warming up. I'm pretty sure, well almost positive it's because I have oil in my plug wells



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1995 ATX
Custom 3in catback with Vortech mufflers
Intrax lowering springs
Sho-Shop lpm
Sho-Shop CAI
Mille Miglia Action with meaty 245/45/17's pirelli p7000's
Two Yamaha powered Intrax stickers and a supercharged K&N sticker!!

"it's the four door, emereld green, 5 liter mustang eater"

Objects in the mirror are slower than my car!

 

[Bizzy]

Originally posted by buechine:
My car starts to misfire after a while. I changed the spark plugs and wires and it still does it. The car seems to buck and I'm not too sure even after reading their descriptions what is the main culprit the Crankshaft position sensor or the Camshaft position sensor.

Not the CPS...that would keep your car from starting at all. No spark...no go. CPS symptoms would be that the car would run for awhile, then just suddenly die. If it's not too bad then after about 10-20 minutes the car will start back up again and run fine. Mine never mis-fired when the CPS was bad. Do a search on it and look for responses from sdpatt...he's a good person to go for advise. This guy rattles stuff off about the SHO that puts most of us to shame. If you can't find any responses post a message for him in contacting shoforum members.

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Proud to be an American!

Beth
'91 Plus MTX, Mostly stock
K&N Filter, Coneless
Colgan Custom Bra
Racing Series Driving Lights
Mods in the works
Many items on wish list!

[This message has been edited by Bizzy (edited 12-12-2001).]

 

[sho_can]

Mine did the bucking for a while, i ran my code's and it gave me a CID failer,(aka-Cam Sensor) changed it any no more problem, and mine use to lag a little between 3k and 4k, the CID fixed that problem, so if i were you i'd replace the CID. but that's me!!! Let us know what's up.

 

[buechine]

Originally posted by sho_can:
Mine did the bucking for a while, i ran my code's and it gave me a CID failer,(aka-Cam Sensor) changed it any no more problem, and mine use to lag a little between 3k and 4k, the CID fixed that problem, so if i were you i'd replace the CID. but that's me!!! Let us know what's up.

Thanks for the posts, Where is the CID located I am not too sure where it is. i think that I can change it myself I was pretty sure the Crank Sensor was out of my league but even with the SHO manual I can't figure out where the cam sensor is?

 

[AutoXSHO]

The CID is back near the rear of the motor, on the passenger's side. It's a cylindrical black plastic part about 2 1/2" in diameter (From memory). Held in place with two screws that couldn't be in a worse place. It's hard to get at, but simple enough to replace.

John V

 

[sdpatt]

The CID (cylinder identification) sensor is mounted on the passenger side of the rear bank exhaust camshaft. It is attached with two 5.5mm screws that I understand are a bear to reach. Beth explained the symptoms of the failing crankshaft position sensor (CPS) very well through her experience. The CID failure normally displays itself through very difficult starting, but normal running. There are apparently failure modes for the CID that can cause engine running problems, but that one was accompanied by an EEC failure code. If you have received a CHECK ENGINE light, you certainly want to check the codes. You may also want to check the easily accessible front bank plug wells for oil. Engine misfires on the SHO are usually caused by secondary ignition problems: plugs or plug wires.

Scott

 

[buechine]

Originally posted by sdpatt:
The CID (cylinder identification) sensor is mounted on the passenger side of the rear bank exhaust camshaft. It is attached with two 5.5mm screws that I understand are a bear to reach. Beth explained the symptoms of the failing crankshaft position sensor (CPS) very well through her experience. The CID failure normally displays itself through very difficult starting, but normal running. There are apparently failure modes for the CID that can cause engine running problems, but that one was accompanied by an EEC failure code. If you have received a CHECK ENGINE light, you certainly want to check the codes. You may also want to check the easily accessible front bank plug wells for oil. Engine misfires on the SHO are usually caused by secondary ignition problems: plugs or plug wires.
Scott

I haven't gotton a service engine soon light, the plug wells do have a little bit of oil. I just changed the plugs and wires--terrible job, would it be a good idea to put a lot of dielectric stuff into the plug wells for a temp fix. This would give me a real good indication whether or not I have to start changing some of the sensors or eventually get the seals replaced in the plug wells.