Engine cuts out?

OFISRFLASH

MEMBER
2006 JEEP WRANGLER
4 CYL
4WD
MANUAL
26,000 MILES

I have been struggling with this issue for 3 years. I have been to the dealer AT LEAST a half dozen times for the exact same thing. My engine cuts out, for a SPLIT SECOND, at load. The speedometer needle starts to drop as soon as the engine cuts out (drops like a rock) but since the engine cutting out last such a VERY short time it usually doesn't have time to reach zero before it pops back up again. But I do not loose any appreciable road speed during the episode. The gas gauge also drops some during the episodes but then recovers after a while. The tach also use to drop to zero momentarily (even tho the engine was still operating) but since the first visit, when they reprogrammed the computer ref. A TSB, the tach doesn't seem to drop but the other gauges still are. The episodes only happen when the temperature is HOT, probably 90 degrees plus, and when the factory air conditioner is ON. The dealership has replaced the PCM twice and the MAF/MAP sensor (code P2074) and the TPS (per the repair order its code P0068). Sometimes the lengine ight comes on and codes are saved sometimes it doesn't and codes aren't saved. I was hoping it was fixed but I was in Palm Springs yesterday and it happened three times (first two episodes engine light didn't come on but the third time it did and stored code P2074).

Tuesday, September 22nd, 2009 AT 11:30 AM

1 Reply

TRAVISCOREY19

MEMBER
1 POST

Dealing with an intermittent issue like the one you've described in your 2006 Jeep Wrangler can be incredibly frustrating, especially when it seems to persist despite multiple visits to the dealer. Since you've already had multiple parts replaced and TSBs addressed, it may require a more in-depth investigation to identify the root cause of the problem. Here are some additional steps you can take to address the issue:

Data Logging: Consider data logging the engine parameters using an advanced OBD-II scanner or a diagnostic tool. This can help capture data during the episodes and might reveal patterns or abnormalities that could be overlooked during a standard diagnostic check.

Wiring and Grounds Inspection: Have a thorough inspection of the wiring harness and grounds related to the engine management system. Intermittent electrical issues can sometimes be caused by loose or corroded connections.

Ignition System Check: Check the ignition system components, including the spark plugs, ignition coils, and ignition module. A failing ignition component can cause brief interruptions in engine operation.

Fuel System Inspection: Inspect the fuel system for issues such as clogged fuel filters, weak fuel pump, or a failing fuel pressure regulator.

Air Conditioning System: Investigate if there's any interaction between the air conditioning system and the engine operation. It's possible that the AC compressor or related components could be drawing excessive power, leading to momentary electrical disturbances.

Engine Grounds and Battery Connections: Ensure all engine grounds and battery connections are clean, secure, and free from corrosion.

Engine Temperature Sensors: Faulty engine temperature sensors might not be sending accurate signals to the engine control module, leading to improper fuel mixture or timing.

Engine Control Module (ECM) Software Update: Check with the dealership or a reputable mechanic if there are any available ECM software updates that might address known issues related to your symptoms.

Aftermarket Accessories: If any aftermarket accessories are installed (e.G, stereo, alarms, etc.), Consider removing them temporarily to see if the problem persists.

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Thursday, January 12th, 2012 AT 11:55 PM