Addicted

So, my son's 96' LS400 blew the front crank seal. So, I pulled it into my shop, and tore into it. I went ahead and did the timing belt again even though it was only 20k old. But, I figured with the amount of oil on it that it was a good idea to change it. Buttoned it all up, and its throwing a P0340 code. Camshaft sensor on bank 1. So, I replaced it with another one on a parts engine in the shop.

Symptoms:
1. with DS sensor plugged in it will stumble. (this occurred with both the original sensor and the replacement one)
2. With the DS Sensor unplugged it will run completely fine, but the Trac Off light blinks and the CEL stays on.

I am beginning to think its off a tooth at the crankshaft. I know the cams were perfectly aligned, but the new belt's Crankshaft mark was halfway between two teeth on the belt and not perfectly aligned on the belt itself.

Has anyone has this issue as well after a timing belt install by chance? I am just trying to justify tearing it down again. Its really throwing me off that it idles and runs perfect with the sensor unplugged. Thoughts?

randal

My thoughts you will not like. But I think you need to get back in there and check the belt alignment. The markings on the belt are just for initial alignment and thats it. After installing the belt initially with the markings, you should ALWAYS rotate the crankshaft several times and recheck for both engine mark to cam pulley alignment when the crank is at TDC. I do at least four revs or more because I do not want to be back in there. The only thing that matters is the engine bracket markings to pulley markings alignment. Disregard the belt markings after rotating.

Why would it run without the sensor? It could be in some limp mode which idles fine, maybe even revs but take it out for some performance and you will find all is not well. I think your initial timing positions are off.

dicer

And what is a DS sensor?

Addicted

Driver's side

dicer

Bank 1 CPS not DS.

billydpowe

iTrader: (1)

well, addicted I'm with randal, you must be a tooth off..
and for dicer, if you cant read his opening post and know what he is talking about, why are you trying to correct him? He already identified it...

sha4000

iTrader: (1)

Bank 1 is def drivers side. I read up a lil on that code last night and everything points to the timing being slightly off like randal suggested.

dicer

Because I wasted time searching for a new thing (term) I never heard of, that is why I got a bit po'ed.

Addicted

CPS would be a crankshaft position sensor. And not everyone knows that the driver's side camshaft position sensor is bank 1.

FWIW, It was indeed off a tooth due to the new belt's mark being off. Tore it back down and its good to go now.

sha4000

iTrader: (1)

Glad you got it squared away without too much trouble.

dicer

Yes it does.
And also what I said too.
http://www.carbibles.com/automotiveabbreviations.html

This one says CKP for crank position sensor.
http://www.greatautohelp.com/automot...iations/c.html

It all depends on how the manufacture that writes the book abbreviates it.

billydpowe

iTrader: (1)

well this forum is just to help each other the best way we can, not to teach the correct way to say things..
"if you read his first post, you would understand what he is talking about and would have no cause to call him on the carpet..

Addicted

Wow, you're really reaching to be right. Its okay, You win. I should have referenced Bank 1. Shame on me. So, here you go:


I am surprised there is no "DS" in your abbreviation catalog for "Driver's Side". Too bad, as it seems everyone else BUT you knew what I was talking about.