slow starting boxster

slow starting boxster

Author
Discussion

tricky360

Original Poster:

389 posts

184 months

Wednesday 5th July 2017
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I've just bought an eBay bargain boxster ,it's an 04 plate with 48k
and it has a problem with slow starting,
it turns over for a while before it kicks in and starts, I've had the battery tested and it's fully charged, just had a service done so new fuel filter and I filled it up with the good stuff petrol,
new crank sensor was needed also by its still slow, what else can I do ?

Heaveho

5,279 posts

173 months

Wednesday 5th July 2017
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If you means it cranks for a while before firing, check for a lazy fuel pump. Does it just do that first thing or every time?

tricky360

Original Poster:

389 posts

184 months

Thursday 6th July 2017
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It does it every time
It's been sitting for awhile before I bought it with low fuel
Seller said it will probably need good fuel and a good run but think it's not that simple

anonymous-user

53 months

Thursday 6th July 2017
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IMO the car needs to go in for proper diagnosis by someone who knows what they're doing and has the right kit. No point wasting time/money swapping parts and hoping for a "lucky dip" fix.

It could be almost anything ignition/fuelling related from spark plugs onwards, and hopefully it's something simple.

Sellers always say "it just needs a cheap/simple fix", but if the fix was cheap/simple they'd probably have done it themselves...

mikefocke

78 posts

104 months

Sunday 9th July 2017
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Fuel pressure needs time to build up because pump was run dry by previous owner and the seals are no longer good? A good P-car mechanic will have the tools to pressure test the system.

Bennachie

1,090 posts

150 months

Monday 10th July 2017
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Corrosion in battery earth strap reducing cranking current. Corrodes inside the cable-you can't really see it.

STiG911

1,210 posts

166 months

Wednesday 12th July 2017
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Bennachie said:
Corrosion in battery earth strap reducing cranking current. Corrodes inside the cable-you can't really see it.
This, or the battery isn't man enough for the car. Just because it's got a full charge doesn't mean it's retaining enough amps to crank the engine properly. Any battery with an AH rating below 74 is a waste of time on a modern Porsche. 77AH at least, 80AH is best.

Rosewood Red

857 posts

152 months

Thursday 13th July 2017
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Mine always takes a second or two to start, unlike the Polo.

Unsure if you mean it sounds "lazy" when turning over. Mine used to - turned out it was the battery. Turns over with much more authority now.

Adam B

27,142 posts

253 months

Thursday 13th July 2017
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Bennachie said:
Corrosion in battery earth strap reducing cranking current. Corrodes inside the cable-you can't really see it.
hmmm, have same on my 997 - was told may need a new starter motor which is a £500 fix, might get someone to look at this first then (battery is new as of a year ago)

wardpaa

9 posts

97 months

Friday 21st July 2017
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I have a 987.1 and have had similar issues but only when sat for a few days.
Previously I had an intermittent non starter which I diagnosed to a faulty connector on the main supply to the pump/sender assy. When you crank the engine, the ECU sends a signal to the pump relay and turns the pump on. You can measure for +12V on the pump fuse.
If you remove the battery then the tray, you will see the fuel tank pump sender unit on top of the fuel tank. Disconnect the supply plug and hoses, Unscrew the large plastic ring and carefully pull out the top cap. Check on the inside for connectors with darkened plastic around them suggesting they have been getting hot.
I had one connector which had this, although the spade connector and contacts were clean, I cleaned the surfaces with an abrasive block, tightened the connectors up slightly so they were hard to push on. Fault resolved.

I also removed the pump and pickup from the bottom of the tank - make sure you run fuel levels down as you will need to put your hand in and turn the assembly anti clockwise before it releases. The internal filter can be unscrewed and removed when placed inside a container to catch excess fuel.
The fuel that came out of mine was black ! So i rinsed it through with clean petrol and reassembled. I could not find a replacement filter so I assumed it was lifetime and part of the whole unit.

Pictures are in here;
https://drive.google.com/drive/folders/0BwoGVmJVGD...