my 89 2.7 will not start in winter months> Solved! - Rennlist - Porsche Discussion Forums

Notices

my 89 2.7 will not start in winter months> Solved!

 
Old 11-24-2018, 09:26 PM
  #1  
scotts911e
User
Thread Starter
 
Join Date: Jan 2011
Location: Carmichael, CA
Posts: 102
Default 89 n/a will not start after a rain but nothing is wet

When the weather starts to get cold my car will not start I have spark and fuel the car turns over but no start this happens every year for the 6 yrs I've owned it!
Does anyone know what could be the problem? Well I thought for a few days that the temp sensor was the problem the car was starting but I think the
reason for that was it must not have been cold enough at the time for it to act up and not start that's got to be it right?? All I know is I replaced the temp sensor twice
lately and the car will not start even when I put a heat gun on it ( that's how I got it to start when we determined that sensor was the problem) but the temp around here
has dipped below 40 deg.F and no start is back to haunt me!

Last edited by scotts911e; 01-08-2019 at 02:48 AM. Reason: problem is not solved
scotts911e is offline  
Old 11-24-2018, 09:38 PM
  #2  
931guru
User
 
931guru's Avatar
 
Join Date: Feb 2007
Posts: 1,362
Default

Probably a bad coolant temp sensor (the one that gives its signal to the DME).
931guru is offline  
Old 11-25-2018, 12:19 AM
  #3  
scotts911e
User
Thread Starter
 
Join Date: Jan 2011
Location: Carmichael, CA
Posts: 102
Default

is there more than 1 I know there is one on the intake is that not the sensor I should be looking at?
scotts911e is offline  
Old 11-25-2018, 10:38 AM
  #4  
931guru
User
 
931guru's Avatar
 
Join Date: Feb 2007
Posts: 1,362
Default



Sorry, I don't have a picture of a 2.7 engine, but the sensor marked with a black circle it the sensor I'm referring to.
931guru is offline  
Old 11-25-2018, 04:30 PM
  #5  
scotts911e
User
Thread Starter
 
Join Date: Jan 2011
Location: Carmichael, CA
Posts: 102
Default

so you say it goes to the dme? if so what number on the dme is the signal?
scotts911e is offline  
Old 11-25-2018, 05:01 PM
  #6  
scotts911e
User
Thread Starter
 
Join Date: Jan 2011
Location: Carmichael, CA
Posts: 102
Default

Well that was it I heated it up with a heat gun for about 10 minutes and she fired up! Thank you so much
you don't even know how happy i am to finally put this problem behind me.
scotts911e is offline  
Old 12-31-2018, 06:30 AM
  #7  
scotts911e
User
Thread Starter
 
Join Date: Jan 2011
Location: Carmichael, CA
Posts: 102
Default

Thought the temp sensor was it but I was wrong still same condition will not start 40 F. or below starts on a sunny day but not easily!
scotts911e is offline  
Old 12-31-2018, 01:13 PM
  #8  
T&T Racing
Addict
Rennlist Member
 
T&T Racing's Avatar
 
Join Date: Jan 2012
Location: New York & Indiana
Posts: 596
Default

Originally Posted by scotts911e View Post
Thought the temp sensor was it but I was wrong still same condition will not start 40 F. or below starts on a sunny day but not easily!
Remove the AFM from the J Boot and spray start fluid or gasoline into the J Boot will another person actives the starter, if it starts, then the issue is probably the fuel injectors.

Remove the fuel injector rail with the fuel injectors attached. Place each injector in a separate cup. Active the starter for x seconds and stopping cranking. Determine the volume of fuel in each container. Differences in volume indicate non uniform fuel flow.

If no fuel in a cup, then switch injector with no fuel with one that sprayed fuel. Retest to determine if the original no fuel cup now has fuel.

If so, the fuel injector harness is OK. Recommend fuel injectors be cleaned and tested if non uniform fuel flow.
BayShore Fuel Injector Service does a good job.
T&T Racing is offline  

Thread Tools
Search this Thread

Contact Us About Us Advertising Cookie Policy Privacy Statement Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: