CYLINDER #3 not firing. Please HELP!!
#1
CYLINDER #3 not firing. Please HELP!!
Here is a summary of the situation so far. My car starts up fine and runs on 4 cylinders briefly before going into idle mode where cylinder 3 cuts out. I think the engine also goes into some kind of limp mode because the engine won't rev above above 1100 rpm after cylinder 3 cuts out. The DME is throwing two codes:
P1106 Manifold Air Pressure Sensor Too Low at Engine Stop(I've cleared it and this one is thrown with Key On Engine Off)
P1688 Electronic Throttle Control Monitor Level 2/3 Air Mass Flow Calculation(this one comes on after the engine is started)
As far as trouble shooting goes I have taken these steps:
-Ohmed out the Coil Pack. Readings are normal so the coil pack is ok
-Switched spark plugs and plug wires between cylinders 3 and 4. Same condition resulted meaning the spark plug and plug wires are ok.
-Cleaned the injectors. Same condition resulted
-Switched injector 3 with injector 4. Same condition resulted meaning the injector 3 is ok.
Reset the DME multiple times. Same condition was still there.
I got a replacement DME and had it realigned to my car. So I'm thinking right now it might be a bad replacement DME. I haven't tested the MAP sensor properly yet. Freeze Frame data showed the MAP was at 11.2 in Hg at 0 rpm and 7.2ish in Hg at 1400 rpm. I don't know if that value is actually in PSI because my baro press. should be 11.4 Psi at my elevation. I also unplugged the MAP sensor and it didn't affect the condition. I think it's the replacement DME unless someone can tell me something otherwise.
P1106 Manifold Air Pressure Sensor Too Low at Engine Stop(I've cleared it and this one is thrown with Key On Engine Off)
P1688 Electronic Throttle Control Monitor Level 2/3 Air Mass Flow Calculation(this one comes on after the engine is started)
As far as trouble shooting goes I have taken these steps:
-Ohmed out the Coil Pack. Readings are normal so the coil pack is ok
-Switched spark plugs and plug wires between cylinders 3 and 4. Same condition resulted meaning the spark plug and plug wires are ok.
-Cleaned the injectors. Same condition resulted
-Switched injector 3 with injector 4. Same condition resulted meaning the injector 3 is ok.
Reset the DME multiple times. Same condition was still there.
I got a replacement DME and had it realigned to my car. So I'm thinking right now it might be a bad replacement DME. I haven't tested the MAP sensor properly yet. Freeze Frame data showed the MAP was at 11.2 in Hg at 0 rpm and 7.2ish in Hg at 1400 rpm. I don't know if that value is actually in PSI because my baro press. should be 11.4 Psi at my elevation. I also unplugged the MAP sensor and it didn't affect the condition. I think it's the replacement DME unless someone can tell me something otherwise.
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