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I'm trying to fix a friend's car. It is an '89 740 n/a with the bosch injection system. The problem is that it sometimes stalls at a stoplight, and then it is really hard to get it started again, but once it starts then everything is fine. The problem happens maybe once every couple days. My friend first took the car to a shop and they replaced the injector and fuel pump relays but this didn't help. I have removed the battery cables (both ends), cleaned the terminals, and reinstalled. I have also checked all the ground wires under the hood to make sure they are tight and the connections are clean. The car also has a new crank position sensor as of a couple months ago. And it already has the replacement 951 ECU so I don't think that's the problem.
When I say it starts hard after stalling, I mean that it cranks and cranks before finally it will fire and run normally. It sputters some during this, almost like it is out of gas or something. Since it only seems to happen at busy intersections, I can't tell if the fuel pump is running or not during all this. The main fuel pump does not seem to make excessive noise or give any other indications that it is on its way out, although the car has 190K miles. I have not yet tested the in-tank pump to see if it is working or not, although that will be the next thing I check.
Any other ideas would be appreciated... Thanks!
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Matt L. -- Cary, NC -- '91 740 wagon
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