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Join Date: Oct 1999
Location: san diego,ca.usa
Posts: 313
idle cycling????

I have a '70 1.7 with stock motor and efi. When idling cold, the motor starts right up. Within 30 seconds, it seems to cycle as follows: idles around 1200, seeks for a couple seconds and idles slightly higher, then cuts out for a second and a half,almost stalling, then repeats the cycle. Once engine is warm however, this cycling stops. Could this be a cold start valve problem??? Any input would help.

[This message has been edited by mikey (edited 10-14-1999).]
Old 10-14-1999, 05:16 PM
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Join Date: Dec 1969
Location: Dade County, FL.
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Always check the ignition system first, but beacuse your problem is temp related it sounds more like a "lean hunt". That is, the motor is running lean and then "catches" itself, then runs rich until it almost dies. Common on closed loop EFI, but I've heard it happens on open loop 914 types also.

If you have a 72+ ECU then there is a knob on the top to adjust it. If you still have the stock ECU try this article. http://www.914fan.net/djet.html
Toward the end of it the author talks about adding an inline "pot" shaft, or variable resistor. This might help, or a new cylinder head temp sensor may be in order (test the CHT according to the article).

The cold start system on a 914 is a "5th injector" that ONLY squirts if the starter is turning and it is under 50 degrees.
Old 10-14-1999, 08:36 PM
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