It ran fine until this, it had a very low battery for the last week and I had been jump starting it. (I just got it running again and put back together) but I trickle charged the optima and now I have a nice and charged battery but now it won't start, I checked the 109 ecu relay, and the 18 load reduction relay. I did this by putting a wire on 30 and 85 on the relays and connected it to a battery, they both clicked but I'm not sure if that's the way you check them. Bottom line is I'm not getting power to pin 23 on the ecu connector and that's coming from the relay #3(109) so I need some ideas, the next move is to check and see if I'm getting power to the relay and if I am, I'm assuming my relay is toast. any input will be appreciated. Thankyou!
Pics for clicks
Find the engines computer behind the firewall. Disconnect both battery terminals and then disconnect the wiring harness from the ECU. be observant and check for corrosion on both the pins of the ECU and the wiring harness plug itself. My car had similar problems to yours and it ended up being corrosion on the connection pins for the ECU. All i did was unplug and plug the ECU and my car suddenly started right up.
I also used a little bit of dialetric grease on the pins with a small brush and then wiped any excess grease off and my car has been running like a champion ever since.
This is just an easy (no cost) thing to try but its insane how simple a problem can be. I was absolutely shocked when i found this out. I also had condensation inside the ECU itself so i had to open up the case and let all the condensation dry out. I was thinking that i would have to replace the ECU but i decided it was worth a shot trying to dry out the ECU and it fixed all the stupid little problems i was having like the motor would cutout at around 4000 RPM. Its cool how i fixed my car without paying any money.
Ok well I'm going to open it up as soon as I can and check it out but I've been all over the ecu and then some, I've been back and forth and back again with checking continuity, I'm thinking a ground may be a culprit.
Ok pin 54 is battery and I do get power there the others are fuel pump, relay 109 #3 and the last # 38 is ignition power on and I have not checked these however if pin 38 does not have power would this tell me if my ignition switch was faulty? And also would this send signal to pin 23?
Ok they all have power when key is on except pin 23, the fuel pump relay is still not kicking and I'm still not getting spark. I'm still getting a ground on pin 23 and that's not supposed to be, its a power supply. I think that's where my problem lies
I jumped the ignition switch and changed the relay along with the fuse block. The reason I changed the fuse block is because I was getting ground out on my red/blue wire and power in to pin 4 where power is supplied to the relay, I was thinking the fuse block was grounding out the 23 pin on the ecu I don't know what else to do I checked everything that I can think of and it's not the ecu because the problem is before it gets there
Okay I hooked up the fuse block when I changed it out I forgot to put in all the relays and fuses in. I don't know what I was thinking but I'm a get home and try to do that,as soon as I do I'll let you know what happens thankyou for your help!
Alright got the fuse block installed, still nothing but now im getting power to pin 23, still no spark or fuel pump priming I checked the pump. I need to replace the pump, however this does not mean it will run. I'm still lacking spark. I'm getting power and ground to the coil.
Ok replaced ignition switch nothing and now my fuel pump is working but still not priming when ignition is on, no spark and my tack jumps to 3 thousand when cranking it could be my ecu, now I'm getting power to pin 23 when my ecu is plugged in only I tried another ecu and still nothing also broke them both open found a nuespeed chip in one, swapped em still nothing I'm ****in irritated wtf!!!!