Im also afraid that if I do spend the extra money on a coil upgrade that it wont fix the problem il just have another working coil set up240hatchsx wrote:Either bad coil or low to no power to coil. Search on YouTube for DIY s13 ignition coil mod. Let me tell you I've never had my s13 start and run so crisp until I did this mod and it's pretty cheap and easy to do as well.
It should be a constant 5v going from the ECU to the distributor on the white wire and black wire. Any fluctuation kinda throws up a red flag to me. And on the ground side of the coil it should be fairly erratic and possibly hard to read on a digital multimeter due to it pulsing the voltage quite quick for every firing of the coil.boneout wrote:It varies between 4 and 5v to the distributer when key is in on position. But to the coil iv only tested the coil with the key in the on position and I get 12v I havent tryed it while cranking what should I get while cranking?
Do u know or know were I can find the voltage read outs for the icm, the distributor , and the coil. I cant just find the proper voltage for them while the key is in the on position and when its cranking?wotandsdwys wrote:It should be a constant 5v going from the ECU to the distributor on the white wire and black wire. Any fluctuation kinda throws up a red flag to me. And on the ground side of the coil it should be fairly erratic and possibly hard to read on a digital multimeter due to it pulsing the voltage quite quick for every firing of the coil.boneout wrote:It varies between 4 and 5v to the distributer when key is in on position. But to the coil iv only tested the coil with the key in the on position and I get 12v I havent tryed it while cranking what should I get while cranking?
Is there any friends of yours you could steal an ecu from? Or junkyard?
Bud, the last post was 8 years ago. I think you meant thread but regardless, download a copy of the FSM linked up at the top there for your car and most have a pretty good troubleshooting section under the EC chapter (engine control)