Question about Chevrolet Express
If you can rap the fuel tank on the bottom and the car starts, it's almost a guarantee that it's your fuel pump.
You have to get it replaced. Your luck at the little rapping trick runs out after awhile.
Posted on Jan 24, 2018
It sounds like it may be a problem with the PATS (Passive Anti Theft System). Chevy has been having problems with PATS since 1992 til current. Even if your key doesn't have a visible "chip" in it, it is possible that you have the PATS system. The newer PATS systems work by recognizing the exact cut of the key. In some cases extremely worn out keys have been known to stop working correctly with your ignition. In worst case scenarios the ignition cylinder itself, which contains the other chip for PATS, wears out so badly that, one time in ten or more your vehicle doesn't recognize the key and fails to start. The logic is this: If a thief tries to jimmy the ignition, the PATS system shuts down the ignition system for 20 minutes (30 on some vehicles). This is supposed to discourage the thief from trying again, while still letting you start your vehicle. There are procedures for bypassing the PATS system on many vehicles, but it is not for the faint of heart. The wiring work itself isn't bad, but there are catches: 1) you must have the vehicle running while you make the modification in most cases, and not shut it off during the bypass. 2) It's recommended you install a switch in the bypassed wire so you can disable your bypass in case your vehicle needs service. 3) if the vehicle dies during the bypass for some reason, you may have to visit the dealership and get a new ignition cylinder, and a quick reprogram of the PCM or ECU to get it going again. (Pricey)
Posted on Feb 06, 2009
Start with fuel system. Listen for fuel pump humm at fuel tank No humm check wiring to pump for power. Then check for spark at plugs and wires. Remove wire from coil and hold near engine and see arch when you crank. No arch. Replace ignition Modular inside distributor cap or cap or rotor
Posted on Feb 04, 2010
It is a very well know fact, that only Ford
Products, have ever had a Fuel Safety Shut Off Switch
Posted on Jul 04, 2012
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