'77 924 Martini--cold start/run problem
02-11-2005, 10:28 PM
#1
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Join Date: May 2002
Location: zeeland, mi
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'77 924 Martini--cold start/run problem
Hi. I recently acquired another project. It runs great when warm, but it's almost impossible to keep it running long enough to get it warm. I was told that the '77 924 has a cold start/run valve or switch or sensor or something. Can anyone help me with this? No manuals yet. Thanks in advance. --Paul.
02-12-2005, 12:19 AM
#3
Rennlist Member
It is most likely the Warm Up Regulator. The Cold Start Injector is only activated for 3-5 seconds when very cold to help start it. Warm Up Regulator adjusts the mixture as the car warms up. On most CIS cars that I have worked on (Owned 7, worked on dozens), if the WUR is in good shape, and the injectors are clean, the car runs very well. CIS has a bad reputation because people don't know how to work on it.
I recommend you pick up a book on Bosch CIS. Performance Products has one for around $30.
I recommend you pick up a book on Bosch CIS. Performance Products has one for around $30.
02-12-2005, 01:41 AM
#4
Three Wheelin'
Dmitry if it were the WUR it shouldn't run great when it's warm. Might be the Aux air valve. I second the Bosch CIS book and you should also get the Haynes repair manual. Another great website with lots of knowledgable people is www.924.org.