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Registered
Join Date: Mar 2001
Location: indianapolis
Posts: 56
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951 Not Running Very Well
I have an 87 Porsche 951 and it appears that when the alternator went out it may have caused other electrical issues. My tachometer has stopped working and the car remains on choke after initial startup, running extremely rich to a point it is un- drivable. I have always looked after this car mechanically for years and it has stock electronics, except for a chip replacement (a long time ago) to cover boost modifications. The problem is how to start troubleshooting this issue without the expensive swap each part out and see if it fixes the problem. Does anyone have any good ideas or links to checking out the DME, MAF and other sensors that may be causing this issue? All I have is a multi-meter and time!
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09-15-2013, 06:49 AM
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In the Fires of Hell.....
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If you have time, why not send your boxes to Ian at 944 Online?
He will test them for you for free. Other things to do? 1) Rich condition might be due to O2 sensor fried or circuit is dead. Replace or check. 2) Find someone in your area with a 951 that you can swap computers with? Good luck!
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PCA Instructor: '88 951S - with LBE, Guru chips, 3Bar FPR, 1.3mm shimmed WG, 3120 lbs, 256 RWHP, 15 psig boost |
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09-15-2013, 09:31 AM
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Ornery Bastard
Join Date: Sep 2001
Location: South Sound
Posts: 2,879
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If it's stuck on cold start, I'd look at the temp sensor. That's what tells the DME whether it needs cold start enrichment or not.
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--------- Silver 1998 Volvo S70 T5 <- Daily (Anja) Guards Red 1986 951 <- Seattle car (Gretchen) White 1976 914 2.0 F.I. <- Prodigal car, traded away then brought back again (Lorelei) |
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09-15-2013, 10:08 AM
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Registered
Join Date: Mar 2001
Location: indianapolis
Posts: 56
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Thank you two for the recommendations on troubleshooting this issue. I'll try and figure out a game plan in the next few weeks, but sensor checks are certainly the first place to visit, so to speak!
Cheers! |
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09-15-2013, 06:52 PM
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Porsche 944S Club Sport
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Ianman:
Check your TPS sensor...Car will run bad if this fails... Later
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Guru944  2006 955 Cayenne S Titanium Series - Marine Blue, 1987 Porsche 944S Club Sport. 1987 Buick Turbo-T Lightweight "Great White", +500HP, TA49 Turbo. http://www.blackbirdmotorsports.com, 944/951/968, 911 and 955/957 Performance Solutions. Thank you Lord, for your Loving Kindness, Tender Mercy, and Grace. Only You are Faithful. |
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09-16-2013, 08:31 PM
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944 Turbo
"Le Mans II"
"Big Blue" 955STi
NYSE Carrera
