Doug, Turned out it wasnt just the ecm. still got trouble. If you remember this was a 97 eclipse turbo with a 1G swap. We are using the 1G CAS to provide both cam and crank signals. It does start now but misses heavily, and within 30 seconds floods 1 & 2. Have read conflicting stories about this swap requiring the injector order to be changed. Sure runs like it needs it. Now have good ignition on all 4, and all injectors now firing. Any thoughts??
Hi,So we have all injectors operating again, but 1&2 are flooding.There really isn't much that can cause an issue specifically on 1 and 2 and not 3 and 4.... 1 and 4 or 2 and 3 would be one thing, but that is an odd combination. Really you are limited to ecu, coil, injectors (individually), etc. I am assuming at this point you are only using the 1G engine and CAS and have transferred over your old coil and injectors. If you haven't, do so now to eliminate any variables there.Otherwise, make sure you have your CAS wired correctly and that it is not backwards etc. There is an illustration of the wiring HERE, as well as additional support information about 1G into 2G swaps (some head-specific swap information, but lots of details that will translate to your situation as well).
Doug,Yes we transferred the old injectors, but we are using a new OEM coil pack and Xstrignition. The road race engineering schematic is what we used and yes thats how its wired. The only thing not checked at this point are the injectors, which were inherited with this motor at the time we bought it, and the fuel press regulator, which is originaland stock. Thinking about new injectors at this point, to eliminate one more thing. but the miss it has is not healty, with this being a fresh motor, we dont want to run it like that with 1 & 2 being washed in fuel like they are. Is there anything to the injector order with a 97?? Ive read about the 95 inversion issue, but does any of thatapply here?? Sure runs like it. Thoughts??
As much as I do not like throwing parts at a car, without knowing the history of the injectors and regulator it may not be a bad idea. There should not be anything to note about the injector order. Particularly, you are using a 1997 computer and wire harness, so the only variable is the CAS and actual engine hard-parts. Regardless, all inline four cylinders fire in the same order, and this particular engine the injectors are always wired with switched power to all four injectors (shared) and individual ground signal for each injector. As long as there is no modification done to the wire harness, and the correct ecu is used for the wire harness and vice versa, there is no way for the injectors to become backwards or anything of the like.The only thing I am aware of as far as things being inverted are the cam signal is backwards on early 95 model ecus, so instead of a 5V on 0V off cam signal it is the opposite. Even if this were the case, it would not prohibit the engine from running relatively normally, it would just be a little less smooth and more likely to stumble under hard acceleration.
DougI think that before buying injectors, Im going to get a new and better set of plug wires,since last time it ran I was pretty sure I saw a kind of arcing from the top of the plugwire boots at the head. Guess its possible to short out enough of the ignition that way to flood it, but its consistantly 1 & 2 only, 3 & 4 look normal when you pull the plugsjust after running. Probly will do injectors too, since these are not stock they are 510swhich I think the stock ecm can adapt for, but stock is a better bet, without running an aftermarket engine mangmt syst. Did ohm out the plug wires, but I guess that reallydoesnt rule out cracks and shorting. Starting the think its possessed...
Oh, yes that is not good! You should never see any arcing at all.If you have a plug wire that is faulty and arcing like that, any time it arcs to the head the plug is not firing, and so the cylinder will flood. Take care of those messed up wire(s) before anything else.
Mitsubishi employed and Factory trained ASE certified technician