I have a 2005 Jetta 1.9 and a 2004 TJ jeep 4.0 I am doing a conversion. The Jeep is a casualty of last summers Portland riots. Looks like the fire was started under the hood and the computer and wiring harness are toast. Will the 1.9 run without the jeep having a computer. I am looking for a jeep computer but they are pricey and then when I find one it will probably have to be flashed from my vin number? I know I would need a jeep computer for the guages to work but will it effect anything with the 1.9. I am new to this diesel engine stuff but am comfortable with gas engines.