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928 "Limp Home Mode" https://forums.tipec.net/viewtopic.php?f=27&t=8038 |
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Author: | Dave928 [ Mon Mar 08, 2010 4:07 pm ] |
Post subject: | 928 "Limp Home Mode" |
Does anyone know about "Limp Home Mode" on a Porsche 928 S4? I got this from a forum in USA and not sure if it could be the problem with mine |
Author: | Brett928S2 [ Mon Mar 08, 2010 7:53 pm ] |
Post subject: | Re: 928 "Limp Home Mode" |
Hi ![]() That mode will ONLY run 4 cylinders...you can actually count the cylinders firing at idle...as in 1,2,3,4 not 1,2,3,4,5,6,7,8...etc If its juts misfiring its NOT limp home mode.... All the best Brett ![]() |
Author: | Dave928 [ Mon Mar 08, 2010 8:32 pm ] |
Post subject: | Re: 928 "Limp Home Mode" |
Thanks for the reply. problem is, the car wont change gear (automatic)and wont go over 30mph |
Author: | JDSPorsche [ Fri Mar 19, 2010 10:53 am ] |
Post subject: | Re: 928 "Limp Home Mode" |
Limp home mode is when the MAF output voltage fails and the LH ECU senses this, and goes into a default program. It might give the symptoms you describe. What Brett is describing is 4 cylinder mode associated with MY89 and later cars with the "ignition protection relay". |
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