kozz57

First off, let me appolizge as I know there are many similar treads out there.

I am at wits end, installed a 2003 DBW 5.3 into my Jeep and had the computer flashed and the wiring harness done by a company out of AZ. Here is what is going on. I try starting the vehicle and it imeadiatly fires, runs for maybe a second or two and dies. Sent the ECM back to tuner to make sure VATS was disabled which he says it is.
Fuel is at 55psi, Noid light pulse two strong flash`s then dies to a very dim to almost out while holding the key and continous cranking. Trottle works, tried unplugging MAF, Checked grounds, replaced injectors with brand new ones (Tuner stated he thought that was the issue) Nothing has helped.
I am disabled, so I hired two different certified mechanics to see if they could figure it out, No change, They both believe VATS is still active.
This is getting very expensive. I am reaching out for help here as my last resort... if i cannot get it to stay running i am just going to part it out..I am out of ideas. Any help would be apprecated. Sorry for the novel...

kozz57

Anyone have any idea`s ?

96 Comp T/A

iTrader: (8)

Sounds like VATS to me.

kozz57

I am starting to think that way also... Noid light flash`s bright for a sesond or two then if you hold the key and keep cranking the light dims, sure acts like the computer is shutting off the injector impulse.

EFIHARNESS

X2 for vats. Steve

96 Comp T/A

iTrader: (8)

Where are you located at?

Jimbo1367

8Do you have your 's CAI and MAF. Hooked up AND in place ? I ran into that before. I put a MAF In place with a tube, problem solved

96 Comp T/A

iTrader: (8)

Under normal circumstances the car will start and run with the MAF unplugged.

kozz57

I am in Vermont, Scanner showed a PO107 code, Barometric pressure circuit low vol.

1964SS

iTrader: (1)

Do you have a scan tool? I would start with that MAP trouble. First see if you can read the voltages with a scan tool. If the voltage is half a volt or lower then unplug the MAP and read for your 5 volt reference voltage on the harness connector.

kozz57

When I try to read the Veiw Data I either get a No connection with key off, or with key on and again in veiw data I see MAP and to the right side of screeen it gives a 3.0 value...

kozz57

Thanks to all who chimed in to help... jalopy is up and running.. installed new MAP sensor and it fired right up...

Jimbo1367

When I first got my swap rinning, it started, idled for a sevens or so then die. Once I installed a temp 4in pipe with maf, it would idle.

claybob

Nice job SS. There are some great minds on this site for sure.

Clay