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2004 Dodge Stratus 2.7L V6 limited to 2500 RPM
03-13-2017, 06:41 PM
Post: #21
RE: 2004 Dodge Stratus 2.7L V6 limited to 2500 RPM
A short update on my limited progress since my last post. We disconnected the battery and checked the PCM wiring and seals. Everything looked very clean and completely dry. No evidence of any corrosion or other damage at the wiring or the PCM.

Installed a new #2 fuel injector and checked the wiring again. Cleared codes and ran engine for awhile. In park it ran up to 4,000 RPM with no Miss for less than a minute. Then, It ran badly until it dropped below 2500 RPM and smoothed out. Scanned codes and it said the O2 sensor was bad, so we bought a new one and installed it. Cleared codes again. It is back to throwing the P0202 #2 fuel injector DTC again and will not rev past 2500 RPM.

Sadly, it is looking like the PCM is bad. That will be an expensive part to replace, very accessible but the part cost is high.
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03-13-2017, 10:18 PM (This post was last modified: 03-13-2017 10:19 PM by Rupe.)
Post: #22
RE: 2004 Dodge Stratus 2.7L V6 limited to 2500 RPM
You may want to scout around the web. I'm seeing replacement PCMs for well under $200. Look for a known brand reman or try Amazon.com as they have a decent reputation... and I am constantly amazed at what they have available. Same goes for Rock Auto on the web.

Keep us posted on your progress as it may help others reading here.
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03-23-2017, 10:01 PM
Post: #23
RE: 2004 Dodge Stratus 2.7L V6 limited to 2500 RPM
I decided to buy the PCM from Autozone to avoid dealing with mail order. We put in the new PCM and it's still throwing the #2 fuel injector code and sputtering at 2500 RPM. We are checking all the wiring again and everything else we did up to this point. if we don't find something soon I May take it to a trans shop for the quick learn and pinion factor adjustment. After that, I may drive it until something fails that can be found and fixed.
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03-23-2017, 10:57 PM
Post: #24
RE: 2004 Dodge Stratus 2.7L V6 limited to 2500 RPM
Not sure if MOPAR uses this system, (originally a Bosch design) but other manufacturers do so you may need to find a wiring diagram to follow the circuit. What I'm driving at is some systems use a dropping resistor to supply power to the injectors, then the ECM / PCM switches the ground side to fire the fuel. Maybe the problem is not the injector itself, the fuel pressure, or the ECM switching side, but the power supply, which is typically 5-6 volts by the time it gets to the injector. You may be able to spot the drop using a "noid light" plugged into the injector harness then observing how the light reacts both when the engine runs ok versus that bad cylinder when it's acting up. A dim light may be your first clue. (dim compared to a known good cyl) These test lights are fairly cheep ($10?) and available at most larger parts stores. Basically they plug into the harness in place of the injector so access to the harness is what's needed. Yes, you will probably set another code (skip?) but that should be easy now that you have the scan tool.
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