crank position sensor - LS1LT1 Forum : LT1, LS1, Camaro, Firebird, Trans Am, Engine Tech Forums

Welcome to LS1LT1.com/LS3forums.com - please click here to register...

 
LinkBack Thread Tools
post #1 of 13 (permalink) Old 10-10-2007, 12:28 PM Thread Starter
Regular Member
 
LearJet's Avatar
 
Join Date: Jul 2007
Location: Daytona Beach, FL
Posts: 522
 
crank position sensor

I am getting a crank position sensor code on my 97 LT1, should i replace the sensor or should I just tune it out? It is my understading that it does nothing but if so why is it there?

1997 Z28- Pacesetter LT's w/ ORY , Magnaflow catback, CC503 camshaft, 1.6 Comp ProMags, Comp 918 beehive springs, CNC ported and polished stock heads, K&N FIPK CAI, Level 3 4L60E, 9.5 inch 3000 stall, Motive 3.73's, !Cats, !EGR, !A.I.R., LT4 KM. Tuned by Brian at pcmforless.com.
LearJet is offline  
Sponsored Links
Advertisement
 
post #2 of 13 (permalink) Old 10-10-2007, 01:09 PM
Administrator
 
03slowZ06's Avatar
 
Join Date: Jul 2006
Location: Jacksonville
Posts: 7,520
 
Send a message via Yahoo to 03slowZ06
Dont do either. Pull it out and look at it. Unless it is green its fine. The code is probley comeing from the wire being oil soaked rather then the sensor bad. Spray the connectors out with electro wash and clean up the sensor itself with some alcohol and see if it fixes your problem first.

03 Z06, LTs, A&A P1SC running 6psi, 550/471
Quote:
Originally Posted by 94FormulaBird View Post
drivers side is a dream....passenger side on the other hand...i lost 2 screwdrivevers and a socket when i chucked them in the woods

u can do it



I am permanently banned from all petting zoo's for getting to friendly
03slowZ06 is offline  
post #3 of 13 (permalink) Old 10-10-2007, 02:30 PM
Regular Member
 
LT1ForFun's Avatar
 
Join Date: Jul 2007
Posts: 319
 
You definitely do NOT want to tune it out. Symptoms like very poor fuel economy, sputtering, etc. will occur, and the motor will eventually shut off and not want to run. If you have a bad sensor, replace it. You can buy the sensor for less than $40.
LT1ForFun is offline  
post #4 of 13 (permalink) Old 10-10-2007, 03:33 PM Thread Starter
Regular Member
 
LearJet's Avatar
 
Join Date: Jul 2007
Location: Daytona Beach, FL
Posts: 522
 
I thought the crank position sensor is only for misfire detection? It runs just fine without it, you can unplug the it and the engine doesn't miss a beat, just turns on the SES. The guys that run Gen1 double roller timing sets with a electric water pump remove the sensor and tune em out...

Anyways, I will pull it out later tonight and take a look at it.

1997 Z28- Pacesetter LT's w/ ORY , Magnaflow catback, CC503 camshaft, 1.6 Comp ProMags, Comp 918 beehive springs, CNC ported and polished stock heads, K&N FIPK CAI, Level 3 4L60E, 9.5 inch 3000 stall, Motive 3.73's, !Cats, !EGR, !A.I.R., LT4 KM. Tuned by Brian at pcmforless.com.
LearJet is offline  
post #5 of 13 (permalink) Old 10-10-2007, 04:15 PM
I'm watching you....
 
BLK WS6's Avatar
 
Join Date: Sep 2006
Location: Little Rock, AR
Posts: 2,917
 
There is a difference between tuning out the cps because the sensors bad (or for tuning reasons) and tuning out the cps to hide another problem. Basically what I getting at is make sure that the cps is giving you a false reading...you don't want to delete it if is going its job by telling you that you have a misfire....and then hiding the problem.

Ever heard of OBDII to OBDI? =!cps


Tuning is for the birds...




BLK WS6 is offline  
post #6 of 13 (permalink) Old 10-10-2007, 04:52 PM Thread Starter
Regular Member
 
LearJet's Avatar
 
Join Date: Jul 2007
Location: Daytona Beach, FL
Posts: 522
 
I am not getting a misfire code, I am getting a crank sensor voltage too high/low or something like that, can't remember exactly what. I will stick it up on the lift and take a look at it in about an hour and post my findings.

1997 Z28- Pacesetter LT's w/ ORY , Magnaflow catback, CC503 camshaft, 1.6 Comp ProMags, Comp 918 beehive springs, CNC ported and polished stock heads, K&N FIPK CAI, Level 3 4L60E, 9.5 inch 3000 stall, Motive 3.73's, !Cats, !EGR, !A.I.R., LT4 KM. Tuned by Brian at pcmforless.com.
LearJet is offline  
post #7 of 13 (permalink) Old 10-10-2007, 07:22 PM Thread Starter
Regular Member
 
LearJet's Avatar
 
Join Date: Jul 2007
Location: Daytona Beach, FL
Posts: 522
 
Ok, I put the car up on the lift and took a look at the crank sensor. The plug was missing the rubber dust boot and the thing was soaked in grime. I cleaned it up and replaced the dust boot. I pulled it out just for kicks and it looks nice and clean. reinstalled it with a new O-ring and plugged it back in. I used a little De-Oxit on the connection too. (if you have never used deoxit go to radio shack and get yourself a can of it, it is expensive but well worth the money. It is a electrical contact enhancer) Cleared the DTC, we will see if it comes back.

1997 Z28- Pacesetter LT's w/ ORY , Magnaflow catback, CC503 camshaft, 1.6 Comp ProMags, Comp 918 beehive springs, CNC ported and polished stock heads, K&N FIPK CAI, Level 3 4L60E, 9.5 inch 3000 stall, Motive 3.73's, !Cats, !EGR, !A.I.R., LT4 KM. Tuned by Brian at pcmforless.com.
LearJet is offline  
post #8 of 13 (permalink) Old 10-12-2007, 06:26 AM
01Z
victim of circumstances
 
01Z's Avatar
 
Join Date: Feb 2006
Location: TaxMe, Ohio
Posts: 444
 
Quote:
Originally Posted by LearJet View Post
I used a little De-Oxit on the connection too. (if you have never used deoxit go to radio shack and get yourself a can of it, it is expensive but well worth the money. It is a electrical contact enhancer).
How expensive? I'm interested but a little too lazy today.
01Z is offline  
post #9 of 13 (permalink) Old 10-12-2007, 02:06 PM Thread Starter
Regular Member
 
LearJet's Avatar
 
Join Date: Jul 2007
Location: Daytona Beach, FL
Posts: 522
 
http://www.deoxit.com/

Check it out, great products.

1997 Z28- Pacesetter LT's w/ ORY , Magnaflow catback, CC503 camshaft, 1.6 Comp ProMags, Comp 918 beehive springs, CNC ported and polished stock heads, K&N FIPK CAI, Level 3 4L60E, 9.5 inch 3000 stall, Motive 3.73's, !Cats, !EGR, !A.I.R., LT4 KM. Tuned by Brian at pcmforless.com.
LearJet is offline  
post #10 of 13 (permalink) Old 04-20-2009, 07:10 PM
Regular Member
 
Join Date: Oct 2005
Posts: 141
 
Send a message via AIM to ihaterice
digging up an old thread here but i think i am having trouble with my crankshaft position sensor... my car just dies randomly and wont start back up again for a while... any help

1993 trans am, a4, slp loudmouth exhaust, cat delete, slp CAI, madz28 pcm tune
1957 chevy (210 not bel air) 350, bored .030 over, forged pistons, .496 duration cam, edelebrock performer intake manifold, mallory cd ignition box, longtube headers, "fund drainer" 431 hp 502 TQ
2001.5 dodge cummins, oversized intake, edge comp, $6,000+ DTT built transmission, 78mm non wastegated turbo.
"i guess when the boys stop playing with 1.8 liters and become men with 5.7"
ihaterice is offline  
post #11 of 13 (permalink) Old 04-20-2009, 07:45 PM
Regular Member
 
michael66's Avatar
 
Join Date: Mar 2009
Location: Alabama
Posts: 154
 
You don't have one. They started using them in 96. Probably your ICM.

RED 1995 PONTIAC TRANS AM, BORLA EXHAUST, PACESETTER MID-TUBE HEADERS, DYNOMAX BULLET IN CAT'S PLACE, 52MM PORTED THROTTLE BODY, FORD RACING BLUE TOP 24LB. INJECTORS, PORTED MAF, 1.6 COMP ROLLER ROCKERS, MSD 6 BOX, MSD COIL, MSD CAP, NGK TR55 PLUGS, MOROSO BLUE MAX 8MM WIRES, 2500 rpm CUSTOM PTC STALL, DERALE TRANS PAN, B&M TRANS COOLER,TRE 255LPH FUEL PUMP, LS1 VOLANT TRI-Y RAM AIR INTAKE, LS1 STYLE WS-6 RAM AIR HOOD,HYPERCOILS LOWERING SPRINGS,17X9 17X11 ZR1 WHEELS
michael66 is offline  
post #12 of 13 (permalink) Old 04-20-2009, 08:11 PM
Regular Member
 
redhotlt1's Avatar
 
Join Date: Apr 2009
Location: south carolina
Posts: 76
 
i`ve had the same issue with my 96 i wonder if anybody has a replacement wires for it if so let me know.
redhotlt1 is offline  
post #13 of 13 (permalink) Old 04-20-2009, 08:17 PM
Regular Member
 
Join Date: Oct 2005
Posts: 141
 
Send a message via AIM to ihaterice
replaced the icm... sometimes with the key just on the tach will jump a bit... like up to 2000 and back down to 0...

1993 trans am, a4, slp loudmouth exhaust, cat delete, slp CAI, madz28 pcm tune
1957 chevy (210 not bel air) 350, bored .030 over, forged pistons, .496 duration cam, edelebrock performer intake manifold, mallory cd ignition box, longtube headers, "fund drainer" 431 hp 502 TQ
2001.5 dodge cummins, oversized intake, edge comp, $6,000+ DTT built transmission, 78mm non wastegated turbo.
"i guess when the boys stop playing with 1.8 liters and become men with 5.7"
ihaterice is offline  
Sponsored Links
Advertisement
 
Reply

Bookmarks

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the LS1LT1 Forum : LT1, LS1, Camaro, Firebird, Trans Am, Engine Tech Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome