92 Jeeta dies after starting
c150L
11-27-2003, 04:34 PM
My boy has a 92 jetta, 1.8, gas, man trans. He called today and says it dies after it starts up and he lets off the key. Says it only runs a few seconds. I do believe there is a timer circuit that momentarily runs the fuel pump to pre-pressurize the fuel system before one cranks the engine. From there, something else has to kick in and signal that the engine is running and thus keeps the FP running untill you shut off the car. Not sure if this input is direct to the fuel pump relay or indirect throught the ECU? I think some of the Audis has some sort of switch in the air box that did this function.
Any assistance would be much appreciated.
Any assistance would be much appreciated.
c150L
11-29-2003, 02:14 PM
Went to pick up the car last evening. Prepared with an old tire to tie onto the back bumber so I could push it back here with the XT-6. (Kinda nice to have a height control to line up the bumpers closer..) Anyway, he tried starting the car. I could hear the FP kick in breifly, then he'd crank and it would start. Then it stops.
Popped the hood, I was expecting to see one of the KE-Jetronic continous injection systems (if that's what they are called) like my VW Rabbit and 3 Audis had. What I found was an eletronic (I didn't look too close) injection system. Looked for the air box and saw what appears to be a flap type intake air flow sensor on top of the airbox. just on the side of it, I see the hose clamp for the inlet tube to the throttle body is not on the tube. Closer look reveals that the inlet tube is not actually on the air box. Close, but about 1/4" gap on top and bottom. Appearently enough leakage that that minimal airflow at idle was not enough to deflect the flapper on the air flow sensor and in turn, keep the fuel pump running. Went and grabbed a screw driver from the Sube. Boy says he's going to be P@#$d if that was all that was wrong and that he got a $10 parking ticket for something as simple as that. Did luck out though. The ticket said if it were there one more day, it was going to be towed. That would have been another 100 bux.
Anyway, put the tube back on, started the car and drove it home. He still has major hesitation on exceleration when car is cold. Thinking he may have had a backfire or something that blew the hose off.
Popped the hood, I was expecting to see one of the KE-Jetronic continous injection systems (if that's what they are called) like my VW Rabbit and 3 Audis had. What I found was an eletronic (I didn't look too close) injection system. Looked for the air box and saw what appears to be a flap type intake air flow sensor on top of the airbox. just on the side of it, I see the hose clamp for the inlet tube to the throttle body is not on the tube. Closer look reveals that the inlet tube is not actually on the air box. Close, but about 1/4" gap on top and bottom. Appearently enough leakage that that minimal airflow at idle was not enough to deflect the flapper on the air flow sensor and in turn, keep the fuel pump running. Went and grabbed a screw driver from the Sube. Boy says he's going to be P@#$d if that was all that was wrong and that he got a $10 parking ticket for something as simple as that. Did luck out though. The ticket said if it were there one more day, it was going to be towed. That would have been another 100 bux.
Anyway, put the tube back on, started the car and drove it home. He still has major hesitation on exceleration when car is cold. Thinking he may have had a backfire or something that blew the hose off.
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