Having problems with your GMC C1500 ?
1996 Chev. W/T,4.3 L Vortec V-6 The vehicle in winter time more noticeably won't start and tries to fire but it is severely flooded. Only way to get it started is to leave it plugged in for four hours plus, seems to evaporate the fuel and it then starts. the vehicle runs alright otherwise, except the odd plug is saturated with fuel and fouling on me.
You could possibly have a fuel injector that is sticking open in that cylinder.The only way to check this is to install a fuel pressure gauge and turn the key to the on position and check the pressure.It should stay between 60 to 66 psi and hold for at least 10 minutes or more.If it goes down the you could have an injector leaking or leaking internally in the tank.I checked service bulletins and found one for the fuel pulsator in the tank getting ruptured from the high percentage of ethynol in the gas.The bulletin number is 66-63-09.The part number is 25175836.This pulsator is updated to handle the high percentages of ethynol.Hope this helps.Good luck.
Sometimes voltage going to furl pump is weak and it will not start its on a 1996 chevy c1500 w/t 4.3 vortec
Repair Help & Product Troubleshooting for GMC C1500
Tips for a great answer:- Provide details, support with references or personal experience .
- If you need clarification, ask it in the comment box .
- It's 100% free, no registration required.