CAS Replacement... - 3000GT/Stealth International Message Center

hyperblu · 05-01-2008, 08:45 PM

My 93 3000gt SL had what seems a misfire every 20 seconds consistantly. I pulled over and it wouldn't start again. After searching and reading why the car is not getting spark, I've come up with the following reasons,
Bad CAS,or bad PTU. How big of a job is it to replace the CAS? I looked on napa for a replacement and it said the car has a left and a right sensor... Is this correct or is there only one? I've also reas that it is behind the crank sprocket. Will I have to remove the timing belt to fix this?

hyperblu · 05-03-2008, 01:44 PM

Wow, I know someone could answer this question... Why is nobody even attempting to help?

Monster Stealth · 05-03-2008, 03:52 PM

There is a crank sensor by the timing belt pulley cog, and a cam sensor on the rear head on the exhaust came I believe. I am pretty sure they can be changed with out removing the timing belt. Have you tested your coilpacks?

edit: If you Have not read this yet, I highly recommend you do.

HugeJay · 05-04-2008, 12:41 PM

Yes the CAS is beside the crank sprocket, you can change it without taking off the timming belt, you have to remove the belts, Crank Pully, Timming belt covers, and then you will have access to it, held down by 2 10mm bolts, just becareful you dont get to rough while putting in the new one, they arnt hard to break. did test the CAS yet? if you take a volt meter and read one of the 3 leads from the CAS you can see if its working or not while cranking the engine. its in the FSM.

hyperblu · 05-04-2008, 08:57 PM

What's an FSM? On my offday i'm going to take off the timing cover and see if it jumped teeth. What kind of notches should I be looking for? If it jumped I might as well same up for a used head and or getting new valves and a re-worked head. Thanks for the input guys!

hyperblu · 05-04-2008, 09:35 PM

Also, after replacing the crank sensor on my cavalier it required a crank angle sensor error relearn. Will this be needed for the 3k?

agerck · 05-04-2008, 10:07 PM

sure its not ur ECU? are you getting a CEL?

hyperblu · 05-05-2008, 11:17 AM

The CEL would only come on when the car jerked. Stayed on for a second, then went away. It did the jerking and CEL every consistant 20 seconds. I STILL have not received my datalogging cable, because the idiot on eBay backordered it for a week, while claiming the item IN-HAND! I have a feeling that I will be unsuccessful at retrieving the codes as I think the codes are cleared after 50 ignition cycles. At least thats how it is on OBDII. I would check the ECU, but I am unsure how to get it. I really need to purchase an FSM for this car.

Anyways, today is an offday, so I am going to purchase a "portable" garage and start tearing this car apart...
Jrod

speedy25 · 05-05-2008, 04:55 PM

Both sensors are easily (well not difficultly!) tested with a multimeter and (PTU) a 1.5v battery.

Save yourself all the expense and effort by testing before you jump to conclusions about whats really wrong.

-SP

agerck · 05-05-2008, 04:58 PM

Stealth 316 - ECM Removal

pull it check of leaky cap. and smell for "fishy smell"

05-01-2008, 08:45 PM	#1 (permalink)
hyperblu Forum Member Join Date: Apr 2008 Trader Rating: (0)	CAS Replacement... My 93 3000gt SL had what seems a misfire every 20 seconds consistantly. I pulled over and it wouldn't start again. After searching and reading why the car is not getting spark, I've come up with the following reasons, Bad CAS,or bad PTU. How big of a job is it to replace the CAS? I looked on napa for a replacement and it said the car has a left and a right sensor... Is this correct or is there only one? I've also reas that it is behind the crank sprocket. Will I have to remove the timing belt to fix this?

05-03-2008, 01:44 PM	#2 (permalink)
hyperblu Forum Member Join Date: Apr 2008 Trader Rating: (0)	Re: CAS Replacement... Wow, I know someone could answer this question... Why is nobody even attempting to help?

05-04-2008, 12:41 PM	#4 (permalink)
HugeJay Forum Member Join Date: Nov 2000 Location: Niagara Falls, ON Drives: 92 R/T Trader Rating: (2)	Re: CAS Replacement... Yes the CAS is beside the crank sprocket, you can change it without taking off the timming belt, you have to remove the belts, Crank Pully, Timming belt covers, and then you will have access to it, held down by 2 10mm bolts, just becareful you dont get to rough while putting in the new one, they arnt hard to break. did test the CAS yet? if you take a volt meter and read one of the 3 leads from the CAS you can see if its working or not while cranking the engine. its in the FSM. Last edited by HugeJay : 05-04-2008 at 12:48 PM.

05-04-2008, 08:57 PM	#5 (permalink)
hyperblu Forum Member Join Date: Apr 2008 Trader Rating: (0)	Re: CAS Replacement... What's an FSM? On my offday i'm going to take off the timing cover and see if it jumped teeth. What kind of notches should I be looking for? If it jumped I might as well same up for a used head and or getting new valves and a re-worked head. Thanks for the input guys!

05-04-2008, 09:35 PM	#6 (permalink)
hyperblu Forum Member Join Date: Apr 2008 Trader Rating: (0)	Re: CAS Replacement... Also, after replacing the crank sensor on my cavalier it required a crank angle sensor error relearn. Will this be needed for the 3k?

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05-04-2008, 10:07 PM	#7 (permalink)
agerck Verified Seller Join Date: Nov 2007 Location: Sacramento Cali Drives: 1992 vr4 & stealth Trader Rating: (1)	Re: CAS Replacement... sure its not ur ECU? are you getting a CEL? __________________ 1992 3000gt VR4

05-05-2008, 11:17 AM	#8 (permalink)
hyperblu Forum Member Join Date: Apr 2008 Trader Rating: (0)	Re: CAS Replacement... The CEL would only come on when the car jerked. Stayed on for a second, then went away. It did the jerking and CEL every consistant 20 seconds. I STILL have not received my datalogging cable, because the idiot on eBay backordered it for a week, while claiming the item IN-HAND! I have a feeling that I will be unsuccessful at retrieving the codes as I think the codes are cleared after 50 ignition cycles. At least thats how it is on OBDII. I would check the ECU, but I am unsure how to get it. I really need to purchase an FSM for this car. Anyways, today is an offday, so I am going to purchase a "portable" garage and start tearing this car apart... Jrod

05-05-2008, 04:55 PM	#9 (permalink)
speedy25 Cant get there from here! Join Date: Dec 2006 Location: NE oHIo Drives: Various Japanese Trader Rating: (0)	Re: CAS Replacement... Both sensors are easily (well not difficultly!) tested with a multimeter and (PTU) a 1.5v battery. Save yourself all the expense and effort by testing before you jump to conclusions about whats really wrong. -SP __________________ One of 789

05-05-2008, 04:58 PM	#10 (permalink)
agerck Verified Seller Join Date: Nov 2007 Location: Sacramento Cali Drives: 1992 vr4 & stealth Trader Rating: (1)	Re: CAS Replacement... Stealth 316 - ECM Removal pull it check of leaky cap. and smell for "fishy smell"