96 Cabrio Fuel Pump Issue
My wife drove her 96 Cabrio a few days ago. When she got ready to drive home, it wouldn't start. I called a tow and had it returned to my garage. It is a 2.0L ABA OBDII with auto transmission. No "Check Engine" light. The light works when starting the engine. It would crank, but not start.
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Which wiring diagram are you using?
You need to get your motor scanned (preferably with VAG-COM\VCDS) for any error codes logged in the ecu and post them, that will save a lot of guessing. You can investigate more components with VAG-COM\VCDS. If you have a 109 relay you can crank it all day and it will never start, its the main power feed to the ecu. https://volkswagenforum.com/forum/ne...gnature-34185/ |
I am using the Bentley manual for testing and wiring diagrams. I don't have or have access to VAG-COM. But, I do have a OBDII scan tool that can reset codes. It shows no codes stored at this time. I do not have relay 109.
In my original post, I mentioned in item #9, the Bentley test said I should have an intermittent ground signal from the ECU to pin 85 on the fuel pump relay. When I turned the key "on", the signal was steady for at least 30 seconds. Last evening, I had my wife sit in the seat while I hooked up a jumper wire from the battery (B+) to the fuel pump. The pump ran and I could hear fuel sloshing through the pump hoses. Probably air that was introduced when I pulled the fuel supply line from the fuel rail during initial testing. I had her try to start the car. On the first attempt, it sounded like a cylinder or two fired. The next two attempts.....nothing. Multiple problems, or am I overlooking something? |
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