daisycivic1.6

I have spent many hours trying to diagnose the main issue I currently have in my 1997 Civic HX Vtec-E.

Check engine light is one. EGR valve low-flow (or some such terminology). It has been cleaned with brake clean multiple times without solving the problem. I checked the EGR valve for proper operation by grounding the negative pin on the valve itself to battery ground. Then running a jumper wire from battery positive to the positive pin on the EGR valve connector, and a "click" is heard. This indicates that it is actually working. I then checked the power (pink) wire from the harness with a DVOM, looking for battery voltage. 6.04V is measured...i checked the ground wire by putting the negative probe on the black wire, and the positive probe on battery positive. Reads 12.3V. I traced the pink wire all the way to the computer, then finally cracked open the computer and found no breaks anywhere in that circuit. The component i traced the pink wire back to (in the computer) is a circuit protector from unwanted spikes in the voltage. Could this be linked to my coil? (Below) If not, why in the world am i not getting battery voltage at that connector like the manual says i should??

Also, tachometer works, however it will sometimes reads at 5000rpm when idling. It will however increase or decrease like it should as i go faster or slower or downshift. This fluctuates between proper function and all the way pegged straight down or anywhere in between.

Could both be linked? If so, could my coil be going out and causing a spike in both circuits??

Thank you very very much for taking the time to read my novel.

ezone

See your other post.

I have no answer about the tach though. Likely just a bad tach.

Gunner

Double post.....