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*Hard start 01 R50* After running w AC On


PrecisionX
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I have a 2001 R50 Auto with 189,000 on it. I bought it with 124,000 on it. If I am running the vehicle and the AC is blasting I will park and turn it off only to find that it doesn’t want to start (but does) if I am not gone for very long. This happens also in the cold. I believe the starter is original, battery might be tired and alternator is new. Not really sure what the deal is. 

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Hmm. And it doesn't do this if the aircon is off? I wonder if the compressor's engaging while you're trying to start the engine. Is it turning over slowly before starting or turning over normally but taking a while to catch?

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Think it's related to the AC, or just the fact that the engine is warmed up?

 

I had a similar issue a couple years ago, where it'd start instantly with a "cold" engine (summer temps, maybe 90-100?), but I'd drive 5 mins to the store, park it for a few minutes, and it wouldn't start.  I think I was able to gas it a little to get it to start.  Happened a few times that year.  If the engine sat long enough to cool down again, started up just fine.  Engine wasn't overheating, nothing else was obvious.  I think I only pulled the intake and throttle body apart, inspected and cleaned things, but I can't recall why I thought that would be part of the problem.  Might have just been a diagnostic starting point, but I also don't recall having the issue again after doing so.  It's one particular event during my ownership I never quite figured out, but just went away.

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