Stalling issues - Code 31 (Camshaft Position Sensor)

[We Gone]

That FSM should have what you need, Their is one more supplement for the LT5

Here are the book #s

ST-364-91 Service Manual covers L98 & LT5.
ST-364-91 EDM Electrical Diag, supplement.
ST-364-91SB Service updates.
ST364-1990/93-LT5-Supp.

When you get them read-read-read

I brought up the chip as GM had a few revisions to address idle issues they should be in the link on Mark's site

http://www.zr1specialist.com/HAT%20W...librations.pdf

Originally Posted by MuRCieLaGo

Thanks! Will buy it then.

Do you think Dynomite's ALDL Code reader is a must to read codes quickly? It seems to be pretty awesome.

A very good tool to have, makes reading codes so much better than the paper clip!!!

[MuRCieLaGo]

All the 4 books are about to be bought now. Will probably be on their way home tomorrow.

Dynomite's Code reader will also be bought if he is OK to ship in Canada.

I hope it will help me in the future.

I know you must think I'm in a rush. Reality is: I won't be able to drive the car in less than two weeks because of winter time. I don't want to have the car sit in the garage for the next two weeks... I can easily fix it as a winter project (but I got all my time now to fix it, I work on a ship and I'm off at the moment).

Do you think the chip *could* fix my problem?

[MuRCieLaGo]

And I hope the manual will help me diagnosing the IAC because I can't find anything on that subject on the forum...

[We Gone]

Originally Posted by MuRCieLaGo

Do you think the chip *could* fix my problem?

No, When I first got my 91 back in 02 it had an outdated chip I changed it than later went to one of Mark's tunes, also one of the first things I did when I got my 93, So just worth checking.

I'm not in any way suggesting your rushing, Just know when I get frustrated I stop and reread about what I'm checking many times just to be sure I don't miss something.

[secondchance]

Murcielago,

I suggest one quick check. Check the MAP sensor to back of the plenum hose. If it has blown off or if you see a soft rubber hose replace it with proper MAP sensor hose - hard plastic with rubber fittings at the end only. Regular vacuum hose will soften with time and collapse under high vacuum preventing the MAP sensor from getting accurate info. It's an easy check with a flashlight.

Also check the code using paper clip method to be sure.

[MuRCieLaGo]

Originally Posted by We Gone

No, When I first got my 91 back in 02 it had an outdated chip I changed it than later went to one of Mark's tunes, also one of the first things I did when I got my 93, So just worth checking.

I'm not in any way suggesting your rushing, Just know when I get frustrated I stop and reread about what I'm checking many times just to be sure I don't miss something.

Speaking about chips, I just found that sticker on the ECM.



P/S 30353. 12/22/2014 is pretty recent... I'm not yet frustrated, I just read a lot at the moment.

Originally Posted by secondchance

Murcielago,

I suggest one quick check. Check the MAP sensor to back of the plenum hose. If it has blown off or if you see a soft rubber hose replace it with proper MAP sensor hose - hard plastic with rubber fittings at the end only. Regular vacuum hose will soften with time and collapse under high vacuum preventing the MAP sensor from getting accurate info. It's an easy check with a flashlight.

Also check the code using paper clip method to be sure.

Alright secondchance I'll look at that as soon as possible, should be easy. I like easy checks. Thanks!

[MuRCieLaGo]

I also noticed an oil leak there. What is that hose?

[Dynomite]

Originally Posted by MuRCieLaGo

I'll remove the plenum this afternoon. However, I need to search for how to test the injectors (that's the next thing I need to test I guess). Haven't found some good, easy explanations yet.

Thanks Dynomite for the complete answer!

INJECTORS
Changing Fuel Injectors TIPS
Bad injector/burnt valves TIPS
Secondary Injector Drivers TIPS
Checking Injector Resistance with Plenum in Place TIPS
RC Injectors
Fuel injector testing electrical
Fuel injector testing pressurized
Bad injectors

[MuRCieLaGo]

Originally Posted by Dynomite

INJECTORS
Changing Fuel Injectors TIPS
Bad injector/burnt valves TIPS
Secondary Injector Drivers TIPS
Checking Injector Resistance with Plenum in Place TIPS
RC Injectors
Fuel injector testing electrical
Fuel injector testing pressurized
Bad injectors

Yes thanks, your sticky threads are a bible!

Just need to understand the diagram now.



FSM is on its way.

[MuRCieLaGo]

Update:

Just started the car cooled down now. It's cold here (38F) heater was off. As soon as I pushed the arrow to increase heating (from 73 to 74), the car died. Started back, went up to 2,000 RPM and died again. Pushed the OFF button and no dying issue. Now I really don't know what it means.