Need help with injector problem
01-12-06, 11:04 AM
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Need help with injector problem
https://www.rx7club.com/power-fc-forum-47/bit-loss-here-498711/
Any ideas? The datalogit section hasn't come up with anything yet. Thank you.
Any ideas? The datalogit section hasn't come up with anything yet. Thank you.
01-12-06, 04:27 PM
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Still nothing, I'm surprised. For those of you who don't want to click the link, I'll repost it here:
When I bought my car it had 850cc primaries and ~1600cc secondaries. I rebuilt the engine about 500 miles ago and I had all of the injectors serviced at that point. When I got a datalogit I had a lot of trouble leaning out the idle without making it run or tip-in poorly, so I decided to swap with RotaryResurrection for a set of recently cleaned 550s. That's where my problems started. After installing the 550s in the primary rail (with a .125" spacer on each to raise them to the original level off of the modified rail) I loaded Chuck Westbrook's non-sequential map. The only parameter I changed was the secondary injector flow to 1600. I tried to start the car and it gave a few pops like it was going to start and then died. I pulled the plugs and they were soaking wet. At that point I suspected an injector leak so I pulled the primary rail and checked for leakage. There was none. I also checked resistance from the ecu to the EGI main relay, which was good for both at about 13.6 ohms apiece. I gave them each a tap of 12v, and they gave a nice quick spray. So I have concluded that the injectors themselves are not at fault. I deflooded the car and tried starting with the "default" map, with Chuck's map with varied injector percentages, and with the stock ecu. All of these yielded the same couple of pops and then flood. I've checked spark and it looks fine (when the plugs are dry). I also opened up the air bleed screw under the throttle body some to see if I was choking the engine somehow. Still no improvement. I am hoping for some ideas of where to go from here. The car was running fine, if a bit rich, right before I swapped in these injectors. They were the only modification I made between running and not running. Thanks in advance for your assistance.
When I bought my car it had 850cc primaries and ~1600cc secondaries. I rebuilt the engine about 500 miles ago and I had all of the injectors serviced at that point. When I got a datalogit I had a lot of trouble leaning out the idle without making it run or tip-in poorly, so I decided to swap with RotaryResurrection for a set of recently cleaned 550s. That's where my problems started. After installing the 550s in the primary rail (with a .125" spacer on each to raise them to the original level off of the modified rail) I loaded Chuck Westbrook's non-sequential map. The only parameter I changed was the secondary injector flow to 1600. I tried to start the car and it gave a few pops like it was going to start and then died. I pulled the plugs and they were soaking wet. At that point I suspected an injector leak so I pulled the primary rail and checked for leakage. There was none. I also checked resistance from the ecu to the EGI main relay, which was good for both at about 13.6 ohms apiece. I gave them each a tap of 12v, and they gave a nice quick spray. So I have concluded that the injectors themselves are not at fault. I deflooded the car and tried starting with the "default" map, with Chuck's map with varied injector percentages, and with the stock ecu. All of these yielded the same couple of pops and then flood. I've checked spark and it looks fine (when the plugs are dry). I also opened up the air bleed screw under the throttle body some to see if I was choking the engine somehow. Still no improvement. I am hoping for some ideas of where to go from here. The car was running fine, if a bit rich, right before I swapped in these injectors. They were the only modification I made between running and not running. Thanks in advance for your assistance.
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