Crap...rough idle/misfires..and long start problem AGAIN!

S4to335 · 11-16-2008, 12:07 PM

This is getting old..I just got it back from the dealership where they told me everything is fixed. They also downloaded 31.1. It misfires when just cruising at 70 mph now. It goes back to the dealership next week..when I can find the time. Can't blame it on the Dinan tune..since they programmed over it.

Injectors? another fuel pump? What now?

O-cha · 11-16-2008, 12:11 PM

How many miles? Did they check if it's specific cylinders or all of them?

Nyulak · 11-16-2008, 12:17 PM

I had minor idle issues and something that felt like a misfire corrected by having the low fuel pressure sensor replaced and the thermostat wiring replaced. I had a code from my C-reader (got it with my ProCEDE) that read thermostat open and a couple of undefined codes. I thought it was from my RR catless pipes and DIY SIM, but it turns out I coincidentally had a fault after installing the pipes. My car now idles smoothly, although the idle wasn't too rough before, and there is no more hesitation during cruising.

My ailments were most noticeable during engine warm up, but it didn't completely go away when running at normal temps. I don't know if they flashed my car, but my car feels fine now.

11-16-2008, 12:07 PM	#1
S4to335 Brigadier General 434 Rep 4,380 Posts Drives: 2014 Audi A4 / 91 Track Miata Join Date: Jan 2007 Location: San Jose, CA iTrader: (5) Garage List 2007 BMW 335i sedan [8.00]	Crap...rough idle/misfires..and long start problem AGAIN! This is getting old..I just got it back from the dealership where they told me everything is fixed. They also downloaded 31.1. It misfires when just cruising at 70 mph now. It goes back to the dealership next week..when I can find the time. Can't blame it on the Dinan tune..since they programmed over it. Injectors? another fuel pump? What now? __________________ Car is now gone .... :-(
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11-16-2008, 12:11 PM	#2
O-cha Brigadier General 218 Rep 4,726 Posts Drives: Mcoupe Join Date: Oct 2007 Location: In front of you iTrader: (2)	How many miles? Did they check if it's specific cylinders or all of them? __________________
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11-16-2008, 12:17 PM	#3
Nyulak Captain 29 Rep 957 Posts Drives: 2022 X3 M40i Join Date: Feb 2007 Location: SheffVill, OH iTrader: (4) Garage List 2009 BMW 535xi [10.00]	I had minor idle issues and something that felt like a misfire corrected by having the low fuel pressure sensor replaced and the thermostat wiring replaced. I had a code from my C-reader (got it with my ProCEDE) that read thermostat open and a couple of undefined codes. I thought it was from my RR catless pipes and DIY SIM, but it turns out I coincidentally had a fault after installing the pipes. My car now idles smoothly, although the idle wasn't too rough before, and there is no more hesitation during cruising. My ailments were most noticeable during engine warm up, but it didn't completely go away when running at normal temps. I don't know if they flashed my car, but my car feels fine now.
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