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the recovery truck winch of shame

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pengers

New member
Has been a bad day for Porsche..it's extremely embarrassing, frustrating, time consuming and aggravating to have to get recovered.

I can hear many of you saying, 'you've just summed up one side of 944 ownership' or, 'welcome to 944 ownership' ha-ha but it is sorta killing the fun.

Had a few mechanicals of late culminating with it cutting out over last 3 weeks - once whilst driving slowly, once at idle and now under full load whilst overtaking (not a great experience - confidence erodes at an alarming rate in these instances). First and second times, restarted after approx. 30-40mins and ran perfectly so not easy to get diagnosed ('we can't find a problem, sir' + 'weirdo alert' looks). Third time lucky, would not re-start, assistance chap thought maybe coil is dying and packed off on flatbed BUT then it did re-start and ran with irregular spark (tested with in-line spark plug strobe lights) very roughly. Have driven it in-between these failures with no problems.

So I am expecting the standard 'check FPR, ECUs, AFM, hoses' but anyone have a definitive answer as in 'happened exactly like that, it was the..'??

I can't see anyway to test all of the above without a doner car or complete set of doner parts so will likely be off to see a nice man soon, all good fun character building experience.

[- std. baltic blue '89 turbo, 117k, sw london]
 
Google "Clark's Garage" and follow Clark's directions for making a DME relay bridge. This is better than using a replacement, evenb a new one, but dont run the car like that afterwards.

I will guess that it is the DME relays, but the FPR is also a likely candidate, and the rotor arm and cap along with the plug leads arent too far behind. Only the leads are expensive for what they are.
 
My first thought was DME, second coil as they can do weird things when warm. Dont think FPR, but easy to pull off vac hose and look for fuel.
 
As has already been said - there are a few obvious culprits. However if you know there is a problem with the sparks (irregular) then it's probably be something on the ignition side. Now that's a problem 'cos sparks usually work or don't work, and it's an intermittent problem which makes it more difficult.

My guess (and it's just that - a guess) is a faulty pick-up sensor on the flywheel, not signalling to the ECU properly when a spark should be propagated and causing the problems.


Oli.
 
I had an intermittent cutting out problem with my Turbo, and after several garage visits and collections it was eventually traced to a wire in the boot (under the carpet) that ran to the fuel pump. It had become frayed, so cut out from time to time. Definitely check the usual DME FPR culprits, but check this as well.
 
I had a similar problem on my S2... had changed the DME relay, ignition amplifier (you won't have a separate one of those) FPR, crankshaft sensor, eradicated the immobiliser... before changing the DME relay again... problem solved. Not sure if it was maybe a corroded DME connection in the fusebox, but nevertheless, check the DME relay (and my second favourite if you have one, immobiliser).
 
I had similar symptons last year and it turned out to be the distributor cap. Start changing the cheapest parts first.
 
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