Notices
924/931/944/951/968 Forum Porsche 924, 924S, 931, 944, 944S, 944S2, 951, and 968 discussion, how-to guides, and technical help. (1976-1995)
Sponsored by:
Sponsored by:

running on 1.st & 2.nd cylinder only

Thread Tools
 
Search this Thread
 
Old 07-29-2003, 07:45 AM
  #1  
924s_owner
Intermediate
Thread Starter
 
924s_owner's Avatar
 
Join Date: Jul 2003
Location: Finland
Posts: 28
Likes: 0
Received 0 Likes on 0 Posts
Default running on 1.st & 2.nd cylinder only

Hi


After endless search of the vacuum leaks and stuff I Finally got my car back in starting shape. Yes there was a minimal vacuum leak on intake manifold where the idle airhose is connector is pressed on manifold. It helped a bit. The car is still ill. :-(

I checked the injectors classic hayness style when idling and unplugging the connectors on injectors on cylinder 3 and 4 had no effect on my idle.

It seems that there is voltage as specified and injector resistance reads 2-3 AS it it should.

Any tips how to further anylize the condition of the injectors.


cheers,


marko
Old 07-29-2003, 02:05 PM
  #2  
Waterguy
Three Wheelin'
 
Waterguy's Avatar
 
Join Date: Aug 2002
Location: Vancouver, BC
Posts: 1,388
Likes: 0
Received 3 Likes on 3 Posts
Default Cylinder #3 and #4 injectors not working

The fuel injectors are driven by grounding through the DME. The #3 and #4 injectors are wired together and are driven by pin #14 of the DME. Pull the connector off the DME and test for electrical continuity between pin #2 of the #3 and #4 injector connectors with pin #14 of the DME connector. As a double check, #1 and #2 injectors connect to pin #15 of the DME. If there is no continuity, you have a broken wire inside your engine/fuel injection wiring harness. This is apparently the usual cause of losing two injectors at one time.



Quick Reply: running on 1.st & 2.nd cylinder only



All times are GMT -3. The time now is 02:58 PM.