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porsche 928 s2 1984


Old 01-12-2018, 01:00 PM
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Red face porsche 928 s2 1984

Made me smile looking at my pall, just can't sell this one, one original pre-family owned, only driver's seat ever sat in, really like the s2, they make me smile every time I look at it.

Please help me and my car, I have 1984 s2 drove perfect no noises from engine purred, then parked up now won't start.

very low compression on all cylinders, cam belt fine and has not jumped a tooth.

Fuel reaching cylinders even thou pressure a little low.

Has spark at all eight spark plugs.

oil crank sensor? oil pump failure/ oil pump pick up blocked.

Please email [email protected]

drove fine till parked up.

Last edited by lovemy928; 01-12-2018 at 01:18 PM. Reason: add email address to post.
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Old 01-12-2018, 02:35 PM
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The engine will run if any and or all of these are no-functioning, just not for long

none of these have any effect on starting or running
".. oil crank sensor? oil pump failure/ oil pump pick up blocked. .."

How old is the fuel, how long was it parked outside, how fresh is the battery, and what do you consider low compression on a standing cold engine?

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Old 01-12-2018, 03:58 PM
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Well, in theory, if it has spark fuel and compression it should start.

If there was a problem with the oil system, it would start. It would run for a short time, make lots and lots of really ugly noises and then quit.


Have you tried to run it on starting fluid? Spray a small amount into the intake horns and see what happens.

If it fires up for a few seconds, then the cam timing and ignition are working correctly and you likely have a fuel delivery issue.

If not, then there is likely an issue with either the ignition or the cam timing.

Just out of curiosity, how are you determining that it has fuel and spark?
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Old 01-12-2018, 04:10 PM
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A. I doubt anyone will be emailing you with suggestions, but who knows? Maybe. However, this is a forum for online help.

B. Start with a very good or new battery. Spray a little WD-40 or other spray lubricant into all cylinders.

C. Get a new compression tester that screws into the spark plug holes, not the kind with the rubber bushing you push down.

D. Open throttle fully, retest compression on all cyl.

Report results. If all compression still lower than about 90PSI, we will go further. Triple check your cam timing, or have another set of knowledgable eyes verify cam timing. That's about the only thing that can affect comp on all cylinders on both banks.
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Old 01-13-2018, 10:04 AM
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mine has never left the garage more than 8' it might be scared, but engine ran , redid many things under the hood it started up and ran, sat for a few months lil beyatch woudn't run after much testing and research from here = crankshaft sensor gremlins. sensor broke on removal ( great just perfect) tried heating it wouldn't budge, ez out helped remove some of the micro wire winding, put some gorilla glue in there and on a stud figuired it would expand fill voids harden and let me pull it out, nope, first time the big monkey ever let me down. 2 part epoxy in the hole and on a new stud and walked away for a few days. came back deep socket, washer and nut on top turned it and slowly made it's way out. hole was all oxidized cleaned it antiseized it and prayed never to go there again
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