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Registered
Join Date: Dec 2008
Posts: 30
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Intermittent Starting problem
The last couple of days I have had starting problems on my 88 928. It cranks fine and has always just started immediately. Two days ago it just cranked and cranked no start, then started fine an hour later, then drove for 10 minutes. Stopped the car, got in to restart and again cranked without starting. Seemed like a fuel problem. I got the car home was getting ready to replace the fuel pump and filter (had a spare), and she fired right up this morning. Anyone experience this before? Advice?
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05-14-2009, 08:05 AM
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Network Native
Join Date: Jan 2007
Location: SoCal
Posts: 10,349
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The Jim Bailey rule is check the relay first.
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05-14-2009, 09:38 AM
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Registered
Join Date: Jun 2007
Location: Simpsonville, SC
Posts: 182
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fuel pump relay going out?
I would check the relay first. Try swapping with the horn relay when it refuses to crank. If the horn then does not work or cranks right up, you have part of the answer... BTW, pulling those relays is a bear. I keep two paint can openers in the car for just that purpose. Of course, disconnect the negative battery terminal in the trunk, or else you will have bigger problems.
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Chris 86.5 928 Indy Red/Black, A/T, 118,456 miles and counting |
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05-14-2009, 09:41 AM
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Join Date: Dec 2008
Posts: 30
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Problem seems solved
Guys thanks for the help. I did charge up the battery over the night. Prior to this the battery would turn over the car but seems to have not been as high as it should have been. I read several sites and one of Wally's sites mentioned a low battery could cause a similar problem. I have run it a lot today and problem seems to have gone away. We will see... Hope this is a good FYI for others.
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05-14-2009, 12:11 PM
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Registered
Join Date: Jun 2007
Location: Simpsonville, SC
Posts: 182
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good to hear. now, why is your battery low?
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Chris 86.5 928 Indy Red/Black, A/T, 118,456 miles and counting |
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05-14-2009, 12:43 PM
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Registered
Join Date: Dec 2008
Posts: 30
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The car had been sitting a while and yes I think there is a gradual drain (maybe a glove box light or something similar). What was strange is that it did crank fairly well. But according to the article I read, we do get a voltage drop when the starter is cranking, and this seemed just enough to effect something else, perhaps the fuel pump relay. Or I may have some dirty contacts on the relay that are adding the the need for high voltage. I have a lot of contacts to clean. Thanks again everyone for your help
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05-16-2009, 06:58 AM
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Network Native
Join Date: Jan 2007
Location: SoCal
Posts: 10,349
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Two big offenders for draining the battery; door pin switch is dirty and thinks the door is open, and interior light switch above the rear view mirror can get a short in the wires.
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05-16-2009, 07:47 AM
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Garage: Yes but no roof.
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I had the same problem, would go away now and then. Swapped relay out, seemed to work, but later no-go.
Turned out after a good cleaning of the fuse mountings as well the problem went away for good. So realy & check the fuse mountings are corrosion free.
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'84 928S (Euro) Automatic Shiefferblaumetallic |
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05-16-2009, 08:47 AM
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Beer
