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No Start Condition 2002 LW200

Any help appreciated. My LW200 is in a no start situation. Last evening my wife called to inform me that the car wouldn't start. I drove to her location, turned the key and the car started. She drove about one mile to our home and parked the car. Today the car won't start, won't fire. There is no fuel pressure at the test valve and I can't hear the fuel pump turn on. There is a quarter tank registering on the fuel gage and the trip meter indicates about 315 miles since last fill up. (I thought of adding gas but I'm hesitant because the tank must be removed if fuel pump is bad.) There are no trouble codes displayed on my code reader. Any guesses? Anybody know how to bypass the fuel pump relay? Thanks in advance.

Reply to
snapperhead
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Check the fuse, too.

I bet the FPR is the same as another relay, like Horn, or A/C. if they are, you can swap the two and see if the problem 'moves' with the relay. if so, there's your answer...

Reply to
Philip Nasadowski

I checked all the fuses under the hood (Fuel Pump, EIS, IGN, Injector). I pulled out the Fuel Pump Relay and checked for voltage at the #30 terminal. No voltage. Your idea of changing relays is a good one. I'll try it but I suspect that something, either the CKP (crank position sensor, or something else is preventing the relay from working. I'd like to get some juice to the fuel pump so I can eliminate that as a problem??? Thanks for the response.

Reply to
snapperhead

Another thought that can confirm your diagnosis of no fuel is to remove the air cleaner tube and spray some ether/starting fluid down the throttle body and then try to start it again. If it fires up and then dies you can confirm your diagnosis of no fuel. If no fuel, then it could be the ASD relay, the fuel pump, or the wiring to/between these.

Bob

Reply to
Bob Shuman

Another good suggestion that I'll try. What is an ASD Relay?

Reply to
snapperhead

Auto Shut Down, this is the fuel pump relay. If the vehicle fails to start within a reasonable time, then the computer disables the fuel pump.

Bob

Reply to
Bob Shuman

Well, I think I narrowed the problem down to the fuel pump. I sprayed some starting fluid into the throttle body and it fired up. That pretty much eliminates the crank sensor and the main computer. I can't get dealer or shop to touch it until at least Tuesday so I'm going to attempt the repair myself. $302 for a new pump from the dealer. Any tips or suggestions appreciated. Thanks for your help.

Reply to
snapperhead

I'd check the fuel rail itself to see if you have any pressure first, then assuming no fuel pressure, I'd check the voltage to the pump before going into the tank for replacement. It could be a connector, relay, wiring... A good schematic of the circuit seems to be a requirement and then just see where you lose the voltage ... if the pump is getting voltage, but not functioning, then it is likely the pump. Good luck.

Bob

Reply to
Bob Shuman

Well, here's the latest with the no start condition. I was all set to change the fuel pump and I decided to take your advice and check voltages again. I got a good diagram from a gentleman on a Saturn Forum.

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I'd checked all the critical fuses for continuity but I decided to check again. The fuel pump fuse 15A was blown. I put in a spare and the car fired up and has been running since.As pleased as I am about the car starting, I'm a bit concerned that the fuse wasn't blown originally but occurred as a result of probing and jumpering the electrical system.The guy at the Saturn Dealership told me to bang on the tank with a rubber hammer. I'm wondering if this freed up the pump? He said that sometimes it works but that the fix doesn't last long?And if I didn't cause the fuse to blow, I'm wondering what did?Not sure if I can trust it for now but I'm happy just the same that it's starting. Thanks for you help. Happy ending for now. Snappa

Reply to
snapperhead

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