i recently relocated my coils/icm in my n/a 3.1 and now the car cranks but won't start. the only time it acts like it wants to is after letting it set for 20-30 minutes. then as soon as you turn the key it will start to fire up and that's it for another 20-30 minutes. the car also started no problem before i relocated the coils.
here's the details:
all coils and plugs are connected and in the correct order
all wire extensions are correct
fuel pressure is at 47 with pump running and holds at 42 when i shut the pump off
i took out a front plug and i'm getting spark
ecm and f/p fuse were good
f/p relay good
icm bracket grounded properly
since i have pressure at the rail is there a way somethings preventing my injectors from opening maybe? injectors only have about 2000 miles on them i 'd say.
i'm at a loss at the moment. any help would be greatly appreciated. thanks in advance.
Quote from: one_fast_prix on December 30, 2006, 04:22:51 PM
i took out a front plug and i'm getting spark
You should check all of the plugs IMO.
i've made yet another observation. i said if i let it set awhile it initialy acts like it wants to start. well then the spark is very strong and had a pretty good sized arch. and then watched the plug and spark after trying to start it again the spark is extremely weak and intermittent it seems.
Or how about the spark plug wires :icon_lol: I'm pretty sure you've went over your wiring again and a again, but I'm afraid you just might have to change it back just to make sure thats the only thing affected it now :thinking:
It sounds like you have an issue with the wiring from the crankshaft position sensor to the ICM to me. If the wire is not properly shielded and routed, you can have weak and/or erratic spark.
it turns out it was the damn wire that connects to the batt. for the pump. what i don't get is why it still wouldn't fire up when i had the the pump on continously. must be some kind of safety or something?
took it out for a test drive and it's still doing the same thing as before. sort of the same syptoms as before i unplugged the egr, but now it's back. it has like a bucking/lunging/hesitation type thing but at only throttle positions and will do it until you press harder on the accelerator or ease it up and stalls occasionaly but not often. i'm going to replace the icm and coils with brand new equip. and new plugs and wires. if it continues which it prob. will, it's got to be some kind of sensor or something. any ideas???
When I first bought my car it would do it, but after replacing every sensor and cleaning everthing, it seem to have fixed mine. But if I had to pick one thing that I beleive might would have made a big difference was cleaning the throttle body real well. Including the small holes, both in the throttle and under the vacuum block plate. Try this unless you already have :thumb:
Mine used to buck, lunge, stutter, and stall but never stalls now. All ive really done is clean throttle body, calibrate IAC, plugs-wires, repaired knock sensor wiring, and map sensor went bad. Also i had some melted vacuum throttle body lines that i didnt notice for a while. I replaced all my coils when i was initially trying to fix it, but they did nothing. Hope this helps.good luck