Starts and dies immediately; runs briefly if MAP hose disconnected

[delcowizzid]

are you running vehicle anti theft in the tune sounds a bit like its active.all the cars i deal with will start and die when vats is active

[wanderingturtle]

I think maybe it's the memcal. I'm looking for a known good one to try.

[dave w]

I have an unconventional and potentially dangerous way to help figure why the engine starts and dies.

I'd pour about 4 oz of fuel down the throttle body and start the engine and see how long the engine will run with the map sensor connected. If the engine keeps running for more than a second, I'd pour another 4 oz of fuel down the throttle body to keep the engine running. If the engine keeps running by being bottle feed fuel, I'd be thinking there is a fuel problem to figure out.

If the engine still starts and dies after being bottle feed fuel, I'd be thinking there is a spark or ignition problem.

Fuel is very flammable and potentially explosive, proceed at your own risk!

dave w

[wanderingturtle]

I have an unconventional and potentially dangerous way to help figure why the engine starts and dies.

I'd pour about 4 oz of fuel down the throttle body and start the engine and see how long the engine will run with the map sensor connected. If the engine keeps running for more than a second, I'd pour another 4 oz of fuel down the throttle body to keep the engine running. If the engine keeps running by being bottle feed fuel, I'd be thinking there is a fuel problem to figure out.

If the engine still starts and dies after being bottle feed fuel, I'd be thinking there is a spark or ignition problem.

Fuel is very flammable and potentially explosive, proceed at your own risk!

dave w

I can keep it running on starting fluid ;)

First thing I did was get a fuel pressure gauge. Fuel pressure and supply is good.

[dave w]

I can keep it running on starting fluid ;)

First thing I did was get a fuel pressure gauge. Fuel pressure and supply is good.

What happens when a noid light is connected to the injector connectors?

dave w

[Nasty-Z]

Does the engine still have an EGR valve ? If so is it operational and closed fully at idle ?

TOM

[wanderingturtle]

I appreciate the replies. This situation is saddening and stressful. My boys and I have put a lot of hours into this van with the interior and upgrades, and now it seems like maybe we made the wrong choice. I really hope I can get this fixed.

I got the other van today. The computer from that van put into this van yields the exact same results. The computer from this van into the new van runs just fine. So computer issues are not the problem.

It does have EGR and it is closed.

W

[wanderingturtle]

Here is what it looks like with a noid light on the injector connector. The part where i fiddled with the tube was because I've had a few beers and I thought I needed to be clear that the tube was disconnected, lol.

https://www.youtube.com/watch?v=86qn...ature=youtu.be

It is dieing because of a lean condition.

[wanderingturtle]

I'm buying another running van tomorrow. I'm going to rob the memcal. I'll fix this damn thing if I have to swap every damn part one at a time.