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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Sun, Oct-15-2017, 09:42:55 AM   #1
steliosm46
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Greece




Default TTFS Rail & Map Sensor Vacuum lines

Hello. guys. i have a bit a problems on my car.

my setup is:

Karbonius Airbox & OEM Flap Unit
Dbillas Cams 280-272
Rocker Arms from TTFS
TTFS Rail & Map Sensor
OEM CSL IAT sensor

the cars doing some ups & downs in idle and when revs up to 4500-5000rpm then doing agressive up & down. its not working good.

we try to pull out the vaccum line in that photo below and then its most 95% car works good!!

any suggestions?

also this cap on the rail is normally keep it close? Its has on it when receive the rail..

i ask the frank if the scalling of the map sensor is correct and said if its not you would have a check of the map sensor..

we a little confuse. why is not working




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Old Sun, Oct-15-2017, 11:02:14 AM   #2
steliosm46
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Default Re: TTFS Rail & Map Sensor Vacuum lines

Also and the fuel pressure regulator is new...
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Old Sun, Oct-15-2017, 01:24:16 PM   #3
paulclaude
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Default Re: TTFS Rail & Map Sensor Vacuum lines

Is the issue only at idle or with general running with the car? Have you checked correct reading of the MAP sensor?

Sometimes with aftermarket camshafts, the fuel table will require adjustment for a smooth idle. The reason it will be idling differently with the vac line disconnected is your MAP sensor reading will change, which in turn alters your ECU relative fueling.
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2005 E46 M3 Track - DIY Tuned - SSV2/BW 3.5" Single Exit - Schrick 288/280 - AEM Infinity - Karbonius CSL Intake - Nitron NTR R3 - Turner ARBs - Poly Bushed - Apex ARC-8 Square Setup - Alcon 365/345mm F&R BBK - Corbeau Buckets - Sabelt Harnesses - SD Half Cage - 6MT Conv. w/CAE Ultra Shifter - Seibon CSL Carbon Boot - GSR Carbon Wings
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Old Sun, Oct-15-2017, 02:57:41 PM   #4
95bullet
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Default Re: TTFS Rail & Map Sensor Vacuum lines

Yeah paul is right. Try and see what happens when you unplug the map sensor
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Discussing Misfires/rough driving after VANOS work! in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)