96Clipse
10-16-2011, 02:12 PM
So I have a serious stumper on my hands with my LsV swapped em1.
The car has been running on this swap great for over a year, but I went out to start it yesterday and it starts for 2 seconds then dies. It will constantly fire up but die right away, and if I hit the gas it dies even faster like its not getting enough gas. So I checked fuel pressure and its good, all injectors are getting powered, but I think they may not be getting pulsed after the engine starts.
I have spark, and my timing is known good because the car ran fine before.
Here's the kicker, when messing around with known honda problems, I thought hey maybe my map and iac are switched, so i switched them and it started up and would idle, but goes into limp mode and won't rev when you hit the pedal.
So I switched them back but left the map sensor unplugged, and surprisingly the car started right up and idled fine, i started it three times and every time it idled normal. So i tried revving it up, and it rev'd up fine, but when coming back to idle stalled out and wouldn't restart, just cranks continually, which im 99% sure is cuz the engine flooded with gas. So I have it sitting right now clearing out. I have searched all over the honda forums etc and found other people with exactly the same problem but none of the threads have any final conclusions in them. All of these other people have tried replacing map sensors, distributors, ecu's, plugs, wires, iac valves all multiple times with no success. Anyone with any other suggestions i'd really appreciate it, i'm stumped because it has enough fuel to start, but seems as if it isn't opening the injectors after the car starts, only when the map sensor is unplugged and the car is running on default mapping can it idle and rev.
Thanks for reading and any advice!
The car has been running on this swap great for over a year, but I went out to start it yesterday and it starts for 2 seconds then dies. It will constantly fire up but die right away, and if I hit the gas it dies even faster like its not getting enough gas. So I checked fuel pressure and its good, all injectors are getting powered, but I think they may not be getting pulsed after the engine starts.
I have spark, and my timing is known good because the car ran fine before.
Here's the kicker, when messing around with known honda problems, I thought hey maybe my map and iac are switched, so i switched them and it started up and would idle, but goes into limp mode and won't rev when you hit the pedal.
So I switched them back but left the map sensor unplugged, and surprisingly the car started right up and idled fine, i started it three times and every time it idled normal. So i tried revving it up, and it rev'd up fine, but when coming back to idle stalled out and wouldn't restart, just cranks continually, which im 99% sure is cuz the engine flooded with gas. So I have it sitting right now clearing out. I have searched all over the honda forums etc and found other people with exactly the same problem but none of the threads have any final conclusions in them. All of these other people have tried replacing map sensors, distributors, ecu's, plugs, wires, iac valves all multiple times with no success. Anyone with any other suggestions i'd really appreciate it, i'm stumped because it has enough fuel to start, but seems as if it isn't opening the injectors after the car starts, only when the map sensor is unplugged and the car is running on default mapping can it idle and rev.
Thanks for reading and any advice!