Starting Issue(s)_A Place To Start
#1
Intermediate
Thread Starter
Starting Issue(s)_A Place To Start
Recently, my car will "hit" during a cold start, but most of the time it will not stay running and will start on the next attempt. After I have stated it and ran it for awhile this is no longer an issue....ONLY when it is cold.
No erratic idling, no missing, no performance loss, no stalling.
Rotors, Plugs, Distributor caps, O2 sensor replaced (< 1 year)
Valves adjusted.
ISV valve cleaned...was not dirty
MAF was cleaned awhile back (Not part of the equation?)
Car will run on either coil/distributor.
No apparent vacuum leaks (lots of hoses).
It is running rich the initial 2-3 minutes after starting.
Idle switch does "click".
What do I check to make sure the switch is working and/or would this cause this problem?
Thanks.
Dale
'91 C2 CAB
No erratic idling, no missing, no performance loss, no stalling.
Rotors, Plugs, Distributor caps, O2 sensor replaced (< 1 year)
Valves adjusted.
ISV valve cleaned...was not dirty
MAF was cleaned awhile back (Not part of the equation?)
Car will run on either coil/distributor.
No apparent vacuum leaks (lots of hoses).
It is running rich the initial 2-3 minutes after starting.
Idle switch does "click".
What do I check to make sure the switch is working and/or would this cause this problem?
Thanks.
Dale
'91 C2 CAB
#6
Intermediate
Thread Starter
I have a new DME relay, but put the original back in the the circuit and no difference.
Why would I need a hammer idle adaptation all of a sudden after running it for nine years?
The plug wires may be the originals; I saw no receipts indicating they were changed. 95K miles, 22 years old.
I would check your cylinder head temp sensor and confirm that it has the right resistance for a warm and cold engine. Where is this located and what are the readings, pins etc.?
Why would I need a hammer idle adaptation all of a sudden after running it for nine years?
The plug wires may be the originals; I saw no receipts indicating they were changed. 95K miles, 22 years old.
I would check your cylinder head temp sensor and confirm that it has the right resistance for a warm and cold engine. Where is this located and what are the readings, pins etc.?
#7
has your batter lasted nine years? maybe time for a new battery.
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#8
IHI KING!
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Degrees C Resistance (ohms)
0 4.4k - 6.8k
15-30 1.4k - 3.6k
40 1.0k - 1.3k
80 250 - 390
100 160 - 210
If you have access to a Scantool or Hammer, you can see this value on the tool. If a temp sensor is faulty, the engine will have starting problems (no cold start enrichment).
#9
Intermediate
Thread Starter
The battery is new and on a trickle charger.
I do not have access to a Scantool or a Bosch Hammer.
Can you get to the sensor from the top and/or does it have a plug in connector for the I/O?
What pin numbers or can you get the readings off the DME ?
Thanks for all the input....
I do not have access to a Scantool or a Bosch Hammer.
Can you get to the sensor from the top and/or does it have a plug in connector for the I/O?
What pin numbers or can you get the readings off the DME ?
Thanks for all the input....
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at worst, an idle adaptation is 15 minutes of labor plus the scan tool. Any Porsche mechanic should be able to accommodate you, especially if there's one you use reguarly. Mine did it for free; car subsequently ran incredibly better.