corsair231
Well-Known Member
- Joined
- Jul 8, 2005
- Messages
- 2,183
Hey Guys, I need some help. I have a no start condition I'm trying to troubleshoot. The story goes like this, Car was running fine. The battery died, (4 year old battery). I removed the battery and the car sat for 3 days until I put a new one in. Turn the key and it cranks over but doesn't start. Checked battery to see if ecu memory wire was connected. It was. I have spark. (Type II setup) I noticed that I didn't hear the fuel pump. I put the fuel pressure gauge on and no fuel pressure. I pulled the relay from the hotwire kit. I have power at the supply. I jumper it to the feed line and the pump kicks on 40 psi. I swap relays. No start. No fuel pressure. Check fuses. All good. I pull the relay and jump the pump again. It comes on and I try to crank the car. Still doesn't fire. No SES codes on the scanner. I put a noid light in the injector harness. No pulse, light does not come on. I also check for voltage at the lead behind the alternator where I have my hotwire trigger plugged in, getting less than one volt. I'm thinking that the ecm has bit the dust.
Now for the questions. I know that the cam sensor can cause the no injector pulse but would it cause the fuel pump circuit not to energize? The lead behind the alternator is supposed to read what voltage? Where is the voltage supplied from(ecm, esc, module)? Is there anything I've missed that may cause these symptoms besides the ecm? I just want to be sure before I drop the money to try a non-returnable computer. Anyone ever had a dying battery toast an ecm?
TIA
Now for the questions. I know that the cam sensor can cause the no injector pulse but would it cause the fuel pump circuit not to energize? The lead behind the alternator is supposed to read what voltage? Where is the voltage supplied from(ecm, esc, module)? Is there anything I've missed that may cause these symptoms besides the ecm? I just want to be sure before I drop the money to try a non-returnable computer. Anyone ever had a dying battery toast an ecm?
TIA