IRPerformance

iTrader: (41)

Well I got my car back on the road yesterday. After putting some miles on the motor, I found that the car would stumble and hesitate badly at anything more than slight load under boost. This would be accompanied by rapidly dropping a/f ratio no matter how much fuel we added. The problem turned out to be a secconday injector not firing. I pulled the manifold and inspected the connectors. They were complete garbage. I can't believe the shop that previosuly worked on my car installed them. They were all brittle and half the connector was missing. Besides the -2 degree timing split that I had at 10 psi and 7k rpm in my so called "tuned" map, this might have been another reason why my last motor grenaded. I replaced them with some brand new haltech connectors that we had in stock. They are only a few $ each so I can't understand why they didn't use them on my car before. When I bought the 1600cc injectors I didn't know I needed connectors. I also don't have any resistors in there. Are they needed? So I soldered in new connectors, and even zip tied them to the injectors so they couldn't pop off, and went to tune for low boost. The car felt great at 8 psi. Better than it ever has at 10. After doing a few 4th gear pulls, my friend had the tuning right on. Then as I was doing a pull at about 7500 rpm the ignition went dead. I coasted to a stop an popped the hood. The egi fuse was burnt. I tried to put in another fuse and it immediately blew. I have a huge short somewhere. I had to call for my roomate to get the trailer and pick us up. Turned out to be a long night. I haven't looked into it much yet, but there is a blue connector by the ecu that has some melted wires. Where does this go to? I plan on checking the wiring diagrams tonight. It seams to have a black wire with a white stripe. I found a similar wire by the injectors. I might ahve shorted something out when installing the connectors. I also remember hearing a faint hum and feeling slight current through the intercooler piping when I was assembling the car. I didn't think much of it at the time. Any ideas of what to check? Maybe I have a bad ground? I dunno. At least the motor seams ok. It sounds fine when I crank it. Let me know what you guys think.

fdracer

what shop worked on it before?