Pelican Parts
Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help

Go Back   Pelican Parts Forums > Porsche Forums > Porsche 924/944/968 Technical Forum

LinkBack Thread Tools Rate Thread
Thread Post New Thread    Reply
Registered User
malpaslane's Avatar
Join Date: Aug 2006
Location: wales , uk
Posts: 133
944 running problems

hi everyone, i,ve just got a 944 on the road for my daily drive , which is starting to have some running problems,. when i first got the car,it ran fine ,but needed a clutch plate and had viabations on start up which went away went engine warmed up , i,ve changed the plate and the belts (which i found someone in the past had set up the balance shafts wrong) and cleaned the thottle body out, car started and ran fine ,except now i have viabation at around 2k rpm and car doesn,t want to idle when cold untill i hold the revs for afew seconds and then it,s ok,but also doesn,t fire up on the button when warm if i,ve let it sit for around 15 to 30 mins, viabation i put down to engine mount before belt change, but now not sure , it seems worst when i lift off accelerator,bad idle in mornings i think is some thing to do with voltage, as when i start the car the volt gauge shows under 12 volts and when i rev the engine the volts go up and i can hear the pump in tank kick in, but the car was fine before the belts were done. can anyone help as i have a long drive coming up very soon and haven,t got time to do alot of checking, cheers
RIK 911 2.7 76 summer only
924 gts repilca - sold
924 turbo s2 - sold
924 turbo s2 nightmare car -sold
Old 12-19-2006, 11:23 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #1 (permalink)
Registered User
Razorback1980's Avatar
Join Date: Nov 2005
Location: Houston, Texas
Posts: 2,944
Send a message via AIM to Razorback1980
If the volts are showing low, one of two things are happening there. Either there is a battery drain somewhere or there is a bad ground. Both happen often with these cars. Does the battery sound low on voltage while cranking in the morning? If so, then there is something draining the battery down over night and the car MAY not be running correctly because of lack of voltage. The other thing to do is put an ohm meter between the negative battery terminal and a metal piece on the engine. Should read zero ohms. If not, clean the ground cable going to the back of the engine. It would also be a good idea to measure the voltage on the battery and then measure the voltage on the main starter post. Make sure those are the same or you need to find a dirty battery cable connection from between the battery and the starter post. As for not idling when cold, there are a number of things to look for on that. Check for any vacuum leaks, these engines are sensitive to those. I am not sure if ROW cars have oxygen sensors or not but if so, then disconnect it before starting the motor one morning and see if it runs better..if so, replace the oxygen sensor. What that does is when the oxygen sensor is disconnected, the computer will richen the air/fuel mixture and if your car runs better, then the oxygen sensor is not adjusting the air/fuel mixture properly. The vibration around 2K puzzles me unless the balance shaft belts are still not on correctly. Maybe double check them.

1990 944S2 Cabriolet
2002 Chevy Silverado 2500HD
2003 Maroon Ford F350 dually
Old 12-20-2006, 06:00 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #2 (permalink)

Thread Tools
Rate This Thread
Rate This Thread:


All times are GMT -8. The time now is 03:31 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page

DTO Garage Plus vBulletin Plugins by Drive Thru Online, Inc.