I don't know whats going on! I was getting a p0108 c code. I read up on it and learned that it was the MAP sensor located on the back of the intake manifold. I shined a light back there and ran my hand back there. I felt it and the sensor was out of the hole, so I tried to push it back in and realized there was a something in the way. I'm sure it was a PCV crossover hose. I tried to move it out the way and it wouldn't work. I tried to move it upwards and it came off on the driver hand side! well I plugged the MAP in seeing as there was room and then I ran into another problem, getting the damn Pcv hose connected again. I finally got it all connected. I went to start it and it started and then died! so now i'm like wth is going on. I checked the hoses to make sure they were plugged in. I looked at the cluster to see if the p0108 code came back but it wasnt there, but now I got 0 oil pressure. I tried to start it up and the same thing happened. I saw the pressure going up at this time. and when it cut off it went back down to 0. I'm lost right now. I dont know where to look or what to do, Can anyone help?! please
thanks in advance

 

Sounds like you may have either broken or otherwise knocked loose the EOP sender wire/connector. It's right back there behind the manifold where you've been rooting around.
My advice would be to just go ahead and unbolt the intake manifold, move it forward enough to get in there and check everything out. BTW, there's a small (1/8" diameter) black nylon vacuum line that connects to the back of the manifold and if you move it far enough forward, it will pull loose. Just make sure to re-connect it before putting the manifold back into it's final resting place.
HTH

 

This sucks! I'm thinking I might have just knocked it loose since I wasn't rough and I didnt hear or feel anything break. I'll check for a loose wire back there. Will it just plug back in? If I have to ubolt the manifold.. would I have to follow the sames steps as removing it and replacing the gaskets, and removing a the fuel rails? and how would I go abotu re torquing the bolts? I would I know when to stop torqing it? I'm sorry I'm asking stupid questions I'm just new to this.

 

No gasket replacement necessary as long as your careful. The fuel rail does not need to come off either since you're only moving the manifold forward a few inches. Be sure to lift and move, not drag and move it. Also, be sure to thoroughly clean all along the edges of the manifold and around the bolt holes first so no dirt/sand/debris falls into your intake runners on the heads.
Use a torque wrench that measures INCH POUNDS and tighten the bolts until the proper torque is reached. Tighten (1st pass) to 44 INCH POUNDS and then to a final torque (2nd pass) of 89 INCH POUNDS. Start in the center and work your way outward in a circular crisscross pattern, with the end bolts being last. If you don't have the proper torque wrench for measuring INCH POUNDS, don't guess. Do it right on those bolts as they are long and skinny and take VERY little torque.
HTH

 

Okay, I'm going to try to do this tomm night, but let me just check on some things. I just have to take the ten bolts holding the manifold down? lift and move forward, I will only be able to wipe down the bolt holes that are not covered and the other ones just leave them be? I will have to get a torque wrench tomm. When I get the manifold back, hoping i get that far, what should I look for? loose wires? I saw on one of the pcv connectors there was a crack? would this cause the 0 oil pressure? hopefully I can get this done right. saying I make sure I get everythign connected and manifold back on and it still shuts off. is there something else that could be wrong?
thanks for the help. do you have a dvd service manual?

 

Yes, just the ten bolts. The two rear bolts will not come up all the way until the manifold is moved far enough forward. Just raise them up and wrap a piece of tape around them to keep them up while you move the manifold forward. BTW, I recommend you take the bolts out, wire brush/clean the threads of any old thread sealer. Use a drop of blue Loc-Tite on the threads when re-installing. The fuel line will still be connected but shouldn't be a problem as you're only going to move the manifold forward enough to get behind it.
You'll see where all the dirt/sand etc, is along the edges of the manifold and around the bolts too. I like to use a vacuum cleaner with a small crack/crevice attachment after first using a small screwdriver to loosen the crud/dirt. Than wipe everything down as best you can. Of course remove the air intake hose at the throttle body up front and you might have to remove and quickly cap the small coolant line underneath the throttle body if there' not enough slack. Remove the short coolant line on the driver's side if necessary and cap both ends. You'll lose a very small amount of coolant but nothing to worry about.
Look for the obvious. Connectors unplugged, broken wires, etc. As I said earlier, there is a small 1/8" diameter black nylon vacuum line that may pull loose when you move the manifold forward. Position the manifold rearwards enough to allow you to re-connect it before moving the manifold back into it's final resting place.
The pcv system has nothing to do with oil pressure and is completely unrelated. The vacuum line from the brake booster runs back there too and may be unplugged causing the engine to die.
Just take your time, use good common sense, watch what your doing and you will be fine.
I don't use a service cd, I have a shop manual I bought when I bought my car for procedures, spec, etc.

HTH

 

Thanks a load. I'm nervous about doing this but it doesn't sound too bad. I won't be able to get to it until sat night. so I will be thinking about it over and over until then. I just hope it's a loose wire. If I can get this done sat I have a cope of the DVD esi program, with all the gm cars on it. I can send you a copy if you like. I'm sure it's much easier to use than flipping through page after page. I just have to re-type the installation instructions seeing as how they have been copied over and over and are now blurry. I just have to burn a copy and I can send you one free of charge.

 

oh I have a fast intake manifold, would this make the procedure any different?
i'm off to work so I wont be back later tonight...

 

No, it shouldn't. Unless someone else here can correct me, I would be fairly certain that the same torque specs apply when tightening the bolts on the FAST manifold too.
Just remember, the spec is in inch pounds. Very important. As a matter of fact when you're tightening, it will "seem" like you're leaving the bolts too loose. Don't be fooled by "feel". Clean the bolt threads, apply a drop or two of blue Loc-Tite and trust your torque wrench.

 

i broke a manifold bolt off in my head tryin to use a torque wrench. i just always do it hand tight andits good to go.

 

dont scare me like that! I'm already scared! now i'm going to worry about a bolt being broken.lol

 

Hand tighten it and all is good-- IMHO
After all, what could possibly go wrong??
no worries bro-

Chris

 

When you get a chance, fill in your info-- location etc...
Would like to know if im up against another hot black vette!!

chris

 

I have no clue, lol. I hope nothing bad. I have a torque wrench in inch to pounds. I'm gonna play it by the book this time. I'm thinking I knocked something loose back there. Or at least I hope. I didn't unplug anything else intentionally. I'm hoping its just a loose oil pressure wire, or something like that!!! hopefully i can get to it tomm

 

have you run it with zero oil pressure indicated??
any knocking, it would happen in seconds if you did.

Chris

 

you wan tto know what i got under the hood

 

Of course-- and pics if you will!!

chris

 

no knocking, it starts up, then dies, i think something is unplugged, no codes either, i dunno whats up, it worked fine, then i tried to plug the MAP sensor back up and got it in and now it dies after i start it, so i guess i was going to check back there by moving the manifold forward some

 

Sounds like a good plan, and it sounds smart.
Most likely thing is you knocked something loose, dont get zero oil pressure for no good reason and you did mess with it before you received the message.

Goodluck with it and let us know how it comes out.

So, what is under the hood and where are you located???

Chris

 

NM--
Kentucky
love the black on black-- they way a mean vette should be!!


Mods:
ls6 motor. stage 3 ls6 cylinder heads, upgraded valvetrain, texas speed cam, and many more
Do detail, I get to kentucky alot....

Chris