 |
 | Home | Contact Us | FAQ | Search & Site Map | Link to Us |
 | Sign In | Join | Other 45 Sites in Network |
Car Forum / Porsche / Porshe 944 / July 2004'83 944 Sputter Problem
My '83 944 starts, idles, and seems to run fine with the exception of one problem. Whenever I get her up past around 4k rpm she sputters. If I ease her back down under this threshold she runs fine again. Since I have a 5 speed it is pretty easy to avoid this higher rpm range during the course of my daily driving. Nonetheless, I would still like to figure out what the problem is. I tried changing my plugs and running some injector cleaner thru my system but that didn't seem to help. Any suggestions? Cheers! sounds like the throttle position switch is bad.... > My '83 944 starts, idles, and seems to run fine with the exception of one > problem. Whenever I get her up past around 4k rpm she sputters. If I ease her [quoted text clipped - 3 lines] > tried changing my plugs and running some injector cleaner thru my system but > that didn't seem to help. Any suggestions? Cheers! I had ta similar problem with my '86 NA. It was a total failure at WOT. Lift a tad, and she's fine. Turned out to be a bad solder joint on a diode in the DME dealing with the Wide Open Throttle fuel enrichment circuit. As the later DMEs are 3.1 and your is, I believe, a 1.2, I can't pinpoint the diode for you. Gee, I'm learning WAAYYY more about DMEs than I ever wanted to know! Larry '86 944 NA '87 944S Thanks for the advice! I'll have to keep my eyes open for a good used replacement DME..... Is there a way to test the throttle switch??? Cheers! instructions for testing throttle switch and a diagnostic flow chart are in the service manual, just download a copy > Thanks for the advice! > [quoted text clipped - 3 lines] > > Cheers! > My '83 944 starts, idles, and seems to run fine with the exception of > one problem. Whenever I get her up past around 4k rpm she sputters. [quoted text clipped - 4 lines] > plugs and running some injector cleaner thru my system but that didn't > seem to help. Any suggestions? Cheers! Silly question: the car's been serviced, hasn't it? Sounds like it could be blocked fuel injectors, or the myriad of other problems, like cracked (or dirty) HT leads, knackered fuel pump and so on. Please don't subject your 944 to any sort of cleaner like the one you describe. To start with, the engine was designed to run on petrol; second, the cleaner won't really do the job. To properly clean injectors, they need to be removed, sent off, ultrasonically cleaned, returned and refitted: This is, however, expensive: replacement injectors are a lot cheaper if you shop around some of the alternative suppliers and factors out there.  SignatureRegards, Dave dave_ryman@hotmailNOSPAM.com http://welcome.to/daves.website http://travel.to/formula.one Yup, the car has been regularly maintained so I'm hoping there are no major surprises here. Where's the site where I can download a copy of the service manual? Thanks again! How long since you changed the fuel filter? A partially clogged one will cause symptoms like you describe. > My '83 944 starts, idles, and seems to run fine with the exception of one > problem. Whenever I get her up past around 4k rpm she sputters. If I ease her [quoted text clipped - 3 lines] > tried changing my plugs and running some injector cleaner thru my system but > that didn't seem to help. Any suggestions? Cheers! When did you change your fuel filter last? Fuel starvation at high rpm is typical of a clogged fuel filter. FR Wilk http://frwilk.com/944dme |
Reply to this Message |
 Sign In
 Join
 My Latest Posts My Monitored Threads My Blog My Photo Gallery My Profile My Homepage Start New Thread Enable EMail Alerts Rate this Thread
|
©2008 Advenet LLC Privacy Policy - Terms of Use
This website includes both content owned or controlled by Advenet as well as content owned or controlled by third parties.