Rough starts...?

[VileZambonie]

Your ecm has a memcal which is a prom not an eprom. It contains the information lookup tables for fuel management, spark timing and executible commands. In order to change the events you would need to replace the prom. Your problem isn't the ecm.

Go through your basic tune up stuff, correct your egr problem, check for vacuum leaks and check the map voltage. Report back after you perform these checks otherwise everyone is guessing for you.

[Skunksmash]

Well in order to be able to do that i need to know how to figure out if i have a K engine code or not. Anyone here know how? Of course i bought the truck used and as such the owner's manual is long gone.

[VileZambonie]

What's the 8th digit of your vin?

[Skunksmash]

Well the 8th number of the vin is in fact... a K. What is that supposed to mean anyway? I guess certain letters are more desirable than others?

[VileZambonie]

The 8th digit is the engine code. 10th digit is model year etc..

[Skunksmash]

Were there two different 5.7L's that year? Otherwise they would not need to know the engine code, i would just tell the parts store that it was a 5.7L and not a 5.0L. Here are some pics of broke or missing vacuum lines on the truck. I am not sure what exactly they go to, or what they are called. Im not to familiar with all this emissions, stuff, im afraid.

[VileZambonie]

It goes to the egr solenoid.

[Russ130]

Hey it might be why the EGR solenoid isn't working.

[Skunksmash]

No it ended up going down to the cancerous growth of emissions crap that runs along the left side of the motor. Got that part fixed. But i went ahead and pulled the solenoid so i can take some pics and ask some more questions. For this next question i will probly need someone familiar with stock TBI stuff. On the side that just one vacuum line plugs into, i dont need any help. I know what line plugs into that. It's the side that has two that i have no idea what to plug in. The one that goes to the EGR valve was plugged into the top, but i have no idea if that was the correct spot. And the bottom one just did not have anything plugged into it at all. Can anyone fill me in on where everything is supposed to go? Below are some pics of the inlets/outlets that i am unsure of. Click 'em to make em bigger. I noticed that not everyone here posts pics in the same way.

When i first bought the truck, it idled pretty bad and would die sometimes when i came to a stop. I knew this was something simple but I was taking full time classes at that time, and had little time to mess with it myself. That and i just didn't feel like it. So i took it to a mechanic, who seemed to think the EGR valve was bad and left the vacuum line off. Not sure if that's all he did but after that the truck ran like a champ. So i am just going to have to track down the broke link in the chain i guess.  But preferably not after buying a bunch of uneeded parts. Can't really afford that right now. Im sure everyone here has bought a part or two (or three) and installed them, (for one vehicle or another) only to find out later that something else was the problem.

[Russ130]

In the bottom picture the one on the right is to your vacumn source. The one on the left with the barb goes to the EGR valve. The other one I believe is not used.

[VileZambonie]

The other one is just supposed to have a filter on it. It's just a breather. Skunk do you have the vacuum hose diagram under your hood on the veci label?

[Skunksmash]

Here is a pic of it, if it is what i think you are talking about.

[Skunksmash]

Also i forgot to mention that the truck is idling VERY high right now due to this problem.

[VileZambonie]

yep just follow that diagram.

[Russ130]

Very high idle is a sign of a vacumn leak.