WON'T START!!
Race Car
Joined: May 2003
Posts: 4,248
Likes: 103
From: SoCal
"It is often the primary culprit of a no-start issue, and is so easy to change, it is a quick diagnosis as to whether it is the problem."
- Ed -
That's it! Ed, you need to buy back your 3.2 Targa to supplement your 993
so you have headaches again like us 3.2 owners.
Check here under 'No-Start' for troubleshooting info:http://www.systemsc.com/diagnostic.htm
- Ed -
That's it! Ed, you need to buy back your 3.2 Targa to supplement your 993
so you have headaches again like us 3.2 owners.
Check here under 'No-Start' for troubleshooting info:http://www.systemsc.com/diagnostic.htm
Thread Starter
Rennlist Member
Joined: Nov 2009
Posts: 2,824
Likes: 233
From: NYC metro area
She started up multile times yestrday, just like normal and drove normally as well. I kept her close to home, just incase. Definitley appears the relay is the culprit. Looking forward to receiving ad installing!
Parts Specialist
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Joined: Aug 2008
Posts: 16,326
Likes: 30
when my fuel pump went out it worked sometimes.....and didnt others - if the fuel pump does cut out on you and you are in some random parking lot wondering how to get home - know in advance where it is and whack that sucker with a stick and it might just get you home one more time (or 20)
Thread Starter
Rennlist Member
Joined: Nov 2009
Posts: 2,824
Likes: 233
From: NYC metro area
when my fuel pump went out it worked sometimes.....and didnt others - if the fuel pump does cut out on you and you are in some random parking lot wondering how to get home - know in advance where it is and whack that sucker with a stick and it might just get you home one more time (or 20)
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Joined: May 2001
Posts: 310
Likes: 66
From: Finland
Hi,
Last winter I had similar problems, the fuel pump did not run.
Found this checklist.
http://www.hiperformancestore.com/Motronic.htm
My problem was that one of the crankshaft position sensors was
bad. Visually it was OK, but did not work. This you can measure
from the sockets in engine bay, left side. The 3 sockets close to
intake manifold.
The crankshaft position sensor is cheaper if you buy the Bosch
part in a BMW box. "Impulsgeber", BMW part #: 12 14 1 708 619
Let me know if you need any more info, but the change is pretty easy.
Last winter I had similar problems, the fuel pump did not run.
Found this checklist.
http://www.hiperformancestore.com/Motronic.htm
My problem was that one of the crankshaft position sensors was
bad. Visually it was OK, but did not work. This you can measure
from the sockets in engine bay, left side. The 3 sockets close to
intake manifold.
The crankshaft position sensor is cheaper if you buy the Bosch
part in a BMW box. "Impulsgeber", BMW part #: 12 14 1 708 619
Let me know if you need any more info, but the change is pretty easy.
Thread Starter
Rennlist Member
Joined: Nov 2009
Posts: 2,824
Likes: 233
From: NYC metro area
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Joined: May 2001
Posts: 310
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From: Finland
Well. lemme try to explain...
A looong time ago there was the PorschFans list, sure that some of you remember this. The need of a
Porsche forum was obvious and some people felt that a new list was needed. So May 28, 1998 a new
Porsche list, "Porschelist" went on-line with a small number of people. This where my lifetime membership
is coming from, thanks John D.
After some time Porsche wanted to protect the name and quite peacefully Porschelist was renamed Rennlist.
I was very active in the old days, but 2002 sold my 911 and then had nothing to say anymore. Rennlist was
re-organized in 2008 and probably then the counter was reset.
In 2008 I was able to buy my old 911 back, she had been more or less sitting in the garage, waiting for me?
When I sold her in 2002, I told the new owner that the rear tires need to be changed, but the same tires was
still on in 2008.
My friend actually bought her, but then I realized how much I had missed her, shortly bought her back.
A looong time ago there was the PorschFans list, sure that some of you remember this. The need of a
Porsche forum was obvious and some people felt that a new list was needed. So May 28, 1998 a new
Porsche list, "Porschelist" went on-line with a small number of people. This where my lifetime membership
is coming from, thanks John D.
After some time Porsche wanted to protect the name and quite peacefully Porschelist was renamed Rennlist.
I was very active in the old days, but 2002 sold my 911 and then had nothing to say anymore. Rennlist was
re-organized in 2008 and probably then the counter was reset.
In 2008 I was able to buy my old 911 back, she had been more or less sitting in the garage, waiting for me?
When I sold her in 2002, I told the new owner that the rear tires need to be changed, but the same tires was
still on in 2008.
My friend actually bought her, but then I realized how much I had missed her, shortly bought her back.
Professor of Pending Projects
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Joined: Nov 2001
Posts: 9,898
Likes: 35
From: Ocala, FL
Back to the car and the fuel pump relay. Sometimes (at least in my case) it is not that the relay is bad, but that it makes poor contact in the socket. The socket where the relay goes in can expand (Each of the pin holes) and make poor contact with the relay.
What I did was to try to close up the contacts at the socket, and also expand the pins at the relay (pins on the relay are split so you can slide a thin blade and open them up a bit).
That cured my intermittent fail to start and shutting off while driving.
Hope that helps... and yes... this was after I replaced the relay, injectors, coil, fuel pump, cleaned every single fuel line, etc... etc... etc... before figuring out it was a poor contact at the relay...
This was on my '83 SC
What I did was to try to close up the contacts at the socket, and also expand the pins at the relay (pins on the relay are split so you can slide a thin blade and open them up a bit).
That cured my intermittent fail to start and shutting off while driving.
Hope that helps... and yes... this was after I replaced the relay, injectors, coil, fuel pump, cleaned every single fuel line, etc... etc... etc... before figuring out it was a poor contact at the relay...
This was on my '83 SC
Rennlist Member
Joined: Nov 2012
Posts: 3,460
Likes: 0
From: Lake Bluff, IL & Lake Mills, WI
Back to the car and the fuel pump relay. Sometimes (at least in my case) it is not that the relay is bad, but that it makes poor contact in the socket. The socket where the relay goes in can expand (Each of the pin holes) and make poor contact with the relay.
What I did was to try to close up the contacts at the socket, and also expand the pins at the relay (pins on the relay are split so you can slide a thin blade and open them up a bit).
That cured my intermittent fail to start and shutting off while driving.
Hope that helps... and yes... this was after I replaced the relay, injectors, coil, fuel pump, cleaned every single fuel line, etc... etc... etc... before figuring out it was a poor contact at the relay...
This was on my '83 SC
What I did was to try to close up the contacts at the socket, and also expand the pins at the relay (pins on the relay are split so you can slide a thin blade and open them up a bit).
That cured my intermittent fail to start and shutting off while driving.
Hope that helps... and yes... this was after I replaced the relay, injectors, coil, fuel pump, cleaned every single fuel line, etc... etc... etc... before figuring out it was a poor contact at the relay...
This was on my '83 SC
I had the relay pop out on me on I90 west of Chicago. There's nothing like getting stuck on the left shoulder on an expressway.
Addict
Joined: Jan 2007
Posts: 37,754
Likes: 15
From: Alta Loma Alone
Hi,
Last winter I had similar problems, the fuel pump did not run.
Found this checklist.
http://www.hiperformancestore.com/Motronic.htm
My problem was that one of the crankshaft position sensors was
bad. Visually it was OK, but did not work. This you can measure
from the sockets in engine bay, left side. The 3 sockets close to
intake manifold.
The crankshaft position sensor is cheaper if you buy the Bosch
part in a BMW box. "Impulsgeber", BMW part #: 12 14 1 708 619
Let me know if you need any more info, but the change is pretty easy.
Last winter I had similar problems, the fuel pump did not run.
Found this checklist.
http://www.hiperformancestore.com/Motronic.htm
My problem was that one of the crankshaft position sensors was
bad. Visually it was OK, but did not work. This you can measure
from the sockets in engine bay, left side. The 3 sockets close to
intake manifold.
The crankshaft position sensor is cheaper if you buy the Bosch
part in a BMW box. "Impulsgeber", BMW part #: 12 14 1 708 619
Let me know if you need any more info, but the change is pretty easy.
Addict
Lifetime Rennlist
Member
Lifetime Rennlist
Member
Joined: May 2001
Posts: 310
Likes: 66
From: Finland
Hope the problem is already solved. Anyhow I recommend that you read the
good checking guide from Hiperformancestore, it give you some basic knowledge
of the Motronic system.
I have also learned the hard way (expensive) that little troubleshooting and
analytical thinking should be the first step. This way you usually find the problem
with minimal effort and you are not unnecessarily changing parts because
"I think I know".
good checking guide from Hiperformancestore, it give you some basic knowledge
of the Motronic system.
I have also learned the hard way (expensive) that little troubleshooting and
analytical thinking should be the first step. This way you usually find the problem
with minimal effort and you are not unnecessarily changing parts because
"I think I know".