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924s167 · Joined: 09 Jun 2009 Posts: 18 Location: Michigan

my friend was looking stuff up on the fuel system for the 87 924s. and he was telling me, he read that the fuel injection system is mechanical? and that it needs adjustments after 100,000 miles?

i feel stupid cuz im pretty good with cars and im having trouble learning how this fuel system works......(sorry, im used to my old honda's) any help would be awsome.....
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87 Porsche 924s
00 Honda civic SI

moorepower · Posted: Thu Jul 02, 2009 12:09 pm Post subject:

Your friend is wrong. No adjustments are necessary on the 924S.

For everything you ever wanted to know about Bosch fuel injection, find the book Bosch Fuel Injection and Engine Management, by Charles Probst. I found a copy at a local bookstore, or I'm sure you could find it at Amazon.com.
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Dan.

'88 924S-LE (Luddite Edition)
Manual steering, manual sunroof, manual windows, AC delete, cruise delete, M030 Konis, 25.5mm torsions, 26.8/20 sways

Paul · Posted: Thu Jul 02, 2009 1:09 pm Post subject:

Look under your hood and more specifically under the fuel rail and ask your friend to tell us what the electrical wiring is for.
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White 87 924S "Ghost"
Silver 98 986 3.6l 320 HP "Frank N Stein"
White 01 986 "Christine"
Polar Silver 02 996TT. "Turbo"
Owned and repaired 924s since 1977
Porsche: It's not driving, it's therapy.

924s167 · Joined: 09 Jun 2009 Posts: 18 Location: Michigan

lol ya, i pretty much figured. like i said, im new to the whole porsche thing. so far so good. you guys are awesome thanks for the info....!!!!!
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87 Porsche 924s
00 Honda civic SI

masterdave · Joined: 10 Dec 2008 Posts: 183 Location: Harrison NY

the system is totally electronic, that was the beauty of the micro chip in the 80s, however if your car does have 100,000 miles i would suggest running some fuel injector cleaner through it, and checking your fuel lines for deterioration. my car quit out on me in the middle of the road 2 week ago after a fuel line gave out and the system lost pressure.

924s167 · Joined: 09 Jun 2009 Posts: 18 Location: Michigan

i am defiantly going to check out my fuel system....im hoping my only problem is a simple fix....lol....hopefully! thanks for the help
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87 Porsche 924s
00 Honda civic SI

masterdave · Joined: 10 Dec 2008 Posts: 183 Location: Harrison NY

if the fuel lines are bad they are not that hard to replace except one that runs from the filter to the fixed line, its is about 12 inches, and runs over the dif, it took me 3 hours to get it off the other day. but the rest of the lines are quite accessible. check the rubber ones first the solid metal lines usually dont go bad. best of luck

dave

mehall · Joined: 15 Dec 2008 Posts: 191 Location: Richmond, MO

The most important thing we need to remember about our cars is that they are over 20 years old.

Even low mileage cars have a lot of rubber/vinyl/plastic parts that need replacing. Brake lines, fuel lines, much of the wireing harness, etc. are exposed to various aging agents (heat, chemicals, road salt, sunlight...). Mileage isn't the factor on these items, it's time.

You should also consider tracking down all your ground points, then cleaning and tightening them down. I was stranded a few years ago (different car) about 150 miles from home. My old reliable refused to start. Turned out to be a bad ground, and the mechanic took all of 5 minutes to diagnose and repair. Still, it was hours waiting my turn and his minimum half hour charge.

Poor grounding is also closely related to fuel injection problems.

Mark
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Mark

'87 White 924s manual
'94 Lexus LS400

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