I would check the air flow meter connector it could have a broken wire , the insulation usually holds the broken wire together. You can order the connector and terminals from your Cat dealer. If you have problems with parts post that and I will find the number for you. You could check you fuel filter one is below the regulator under a cast aluminum cover. Depending on the year there are two possible locations for the last chance filter. If the elbow where L.P. enters the carb has screws, it is under it. If not look under the cover above the L.P. pressure sensor on the carb. The filter is a thin screen so be careful it is easy to damage. Post the serial number if you need more information. Good luck.