Dodge Repair/'97 LH Intrepid: no start
QUESTION: first I think it's called an ecu engine computer ? 1997 dodge intrepid 3.5 it started dying then starting back up after a while did some research it was saying ecu then the fun began replaced ecu twice with rebuilt & flashed no go just cranked thought it was lowsy rebuid or flash job bought used one p/n # 4606455ab my question is, is it blowing the ecu , if so how ? thanks checked the fuses
ANSWER: Hi Curtis,
I think you are describing the powertrain control module (pcm). When you say "did some research" do you mean that you got a readout of the fault codes that may be stored in the pcm?
Or was that simply an opinion?
Dying and then starting back up after a while is typically the behavior of one of the two rotational position sensors, either the cam or the crankshaft sensor. Those each have a fault code and there is also a code for a failed pcm. Try turning the ignition key: "on-off-on-off-on and leave on" doing that in 5 seconds or less elapsed time. Then watch the check engine light which remains "on", to see if it begins to flash, pause, flash, etc. If so, count the number of flashes before each pause, then repeat for assurance of an accurate set of flash counts. If that doesn't happen then instead do the key dance and watch to odometer window to see if the mileage reading is replaced by a 4-digit number preceded by a P.
If neither of those work borrow or buy a plug in code reader that goes into a socket under the dash next to the steering column and get a fault code that way.
Once we have a code we'll be much more likely to know what is wrong. I doubt that the wiring is 'blowing' the pcm.
---------- FOLLOW-UP ----------
QUESTION: sounds like good news, when I said research my brother did the code thing he said it wouldn't throw a code, the thing is in the process of changing the pcm we ended up without a unit at all, some how with the the core exchange we got money instead of a core .so I gotta get another one no matter what I do next,the reason he kept changing the is because it wasn'nt throwing a code sorry about the long response I want to make it as clear as I can
So you don't have a pcm to work with? When you do, try turning the key to the run position to see first of all whether you hear the fuel pump inside the fuel tank hums for a second or not. That is what it should do normally. Then when you start cranking the engine it should hum all the while you are cranking but its hum may be drowned out by the sound of starter motor. The issue is, does it run for a second when you turn the key to run. Does the check engine light come on?
If it doesn't start then remove one plug and check to see it is showing a spark by grounding the threads of the plug against the cylinder head while a helper cranks it over.
That way you can get a handle on why it may not be starting.
Also check for fault codes as I described in my first answer.
I don't believe it is likely the pcm was ever damaged.