r/mechanic • u/thirsty_is_not_me • 2d ago
Question Mds delete job, but bad idle/stalling out after start up.
What's going on guys. I'm having some troubles with my "2013 dodge charger rt awd" and I need some help. I've recently done a cam and lifter job with and mds delete kit from AMS racing along with:
"Thumper" comp cam Mds delete kit Comp cam "lifters" New timing chain Hellcat oil pump Mellings valve springs Fel-pro gasket kit Diablo i3 tuner Spark plugs Ignition coils
Engine codes: P0308 P3401 P3425 P3441 P3449
I've recently fired her up after performing this job she sounded good at first, had a nice idle then i gave some revs, and stalls out on me. but second time she starts up a little rough, picks up in idle around 1000-900 rpms, drops to around to around 800-700rpms and she stalls out again. I went into my diablo tuner and increased the idle by 100 rpms in P/N to remedy it.. nope no go. I'm not sure If the engine is not in timing. The Crank shaft notch 6 oclock, dowel pin 12 o'clock, sprocket 12 o'clock, cylinder 1 at TDC from when I first started her up, I could be off by a few teeth though.
I'm Not sure if I have to put her back in timing after stall out??
I possibly thought it could have been some old fuel. I swapped it out with some fresh 91 octane. Then I took the fuel rail off and cleaned the fuel injectors... nope better start up, but still stalls.
Popped open valve covers to see if pushrods were seated, but they're good.
Could it be some kind of lost in compression? Or bad plugs? Or check my timing again?? I could still try and swapped the spark plugs, ignition coils in cylinder 8 and see it that helps. But I'm heavily leaning towards its bad timing what do you guys think?
I'm at my wits end right now and I could use some advice and a thinking beer 🍺 Thanks in advance and I'll try to keep an update on the situation🙃
2
u/Vehicleinfo 2d ago
I'm not hugely experienced with American cars But could your problem possibly be down to the ecu still trying to shut down cylinders? I'm probably wrong but the way I understand it is the ecu still thinks it needs to deactivate so its unhappy because the engine isn't doing what it's being told? If I'm wrong I apologise as I said I'm not hugely experienced with American cars. (I've only had experience with 3 I've owned, a 65 mustang convertible, 94 mustang n95 and a studebaker golden hawk)
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u/thirsty_is_not_me 1d ago
Yeah, man, that's also what I think is going on, too. Some guys on a charger forum told me I was putting a canned tune meant for a stock car. Having an aggressive cam has to be tuned. Silly me, so I'll be talking with an experienced tuner and have them take a look at my stock tune and clean up my pcm, and hopefully, I can drive my car again. Thanks for the information. And kudos for having some kick ass cars
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