Engine Hesitate 7,200 Rpm

Weyne Masters · 10-20-2015, 10:20 AM

Hello guy,late weekend during the 1/2 roll race,I realize an engine hesitate about 7,200 just after shift 4 gear,after secs a car pull forward again.
Car has 7.400 miles
Sparks OEM(never change)
Engine VT2-625 6,5 PSI
Fuel 95 AKI+NF Race Octane Booster.

Questions 1-could be a spark malfunction(pre ignition)?
2-could be a coil malfunction ?
3-Lets suppose it could cause by spark failure,HOW ABOUT THO CHANGE the SPARKS for a colder like HKS-M45HL ?

Sales@Alekshop · 10-20-2015, 11:58 AM

Quote:

Originally Posted by Weyne Masters

Hello guy,late weekend during the 1/2 roll race,I realize an engine hesitate about 7,200 just after shift 4 gear,after secs a car pull forward again.
Car has 7.400 miles
Sparks OEM(never change)
Engine VT2-625 6,5 PSI
Fuel 95 AKI+NF Race Octane Booster.

Questions 1-could be a spark malfunction(pre ignition)?
2-could be a coil malfunction ?
3-Lets suppose it could cause by spark failure,HOW ABOUT THO CHANGE the SPARKS for a colder like HKS-M45HL ?

Change your plugs first. This is usually what causes it. Only other thing that would cause hesitation at that RPM is improper fuel delivery but that would be very rare.

Weyne Masters · 10-20-2015, 12:30 PM

Quote:

Originally Posted by Sales@Alekshop

Quote:

Originally Posted by Weyne Masters

Hello guy,late weekend during the 1/2 roll race,I realize an engine hesitate about 7,200 just after shift 4 gear,after secs a car pull forward again.
Car has 7.400 miles
Sparks OEM(never change)
Engine VT2-625 6,5 PSI
Fuel 95 AKI+NF Race Octane Booster.

Questions 1-could be a spark malfunction(pre ignition)?
2-could be a coil malfunction ?
3-Lets suppose it could cause by spark failure,HOW ABOUT THO CHANGE the SPARKS for a colder like HKS-M45HL ?

Change your plugs first. This is usually what causes it. Only other thing that would cause hesitation at that RPM is improper fuel delivery but that would be very rare.

Ok Aleks,should I go to OEM or HKS-MH45?

Sales@Alekshop · 10-20-2015, 12:36 PM

Quote:

Originally Posted by Weyne Masters

Ok Aleks,should I go to OEM or HKS-MH45?

For a 625 kit OEM is fine.

Weyne Masters · 10-20-2015, 12:37 PM

Quote:

Originally Posted by Sales@Alekshop

Quote:

Originally Posted by Weyne Masters

Ok Aleks,should I go to OEM or HKS-MH45?

For a 625 kit OEM is fine.

I will go to 650 sooner!

Patrón · 10-20-2015, 12:57 PM

i'm not familiar with the octane booster but it could have fouled your O2s. do you have the stock cats/xpipe?

Longboarder · 10-20-2015, 03:03 PM

For ESS 625 or 650 the best thing is stock plugs and run 93 octane minimum with less than e25 and it will be perfectly reliable and make the most power this way.

Octane boosters can foul our ion sensitive plugs fairly quickly - although one can of that stuff alone is unlikely to cause this type of issue. Also, too high of octane can cause the car to run slower/less power than simply good 93.

Weyne Masters · 10-20-2015, 03:20 PM

Patron the car gás MS decats and straight pipes!

Weyne Masters · 10-20-2015, 03:22 PM

Longboard tks for your help.
About fuel has 95 AKI e25 on pump gas!

Weyne Masters · 10-20-2015, 03:31 PM

About fuel we 100% of history off my car it has PODIUM 95AKI(e25%) on Pump gas.

oolas3 · 10-20-2015, 03:32 PM

If your spark plugs come out with an orange coating on them, it's from the octane boost. You don't want to use octane boost in these cars.

Weyne Masters · 10-20-2015, 04:52 PM

Do you believe the O2 sensor maybe affect? I did Not think in that possibility !!!

oolas3 · 10-20-2015, 05:17 PM

Quote:

Originally Posted by Weyne Masters

Do you believe the O2 sensor maybe affect? I did Not think in that possibility !!!

You would probably throw a code eventually with a bad o2. I'm guessing it's the plugs or a coil pack. I had 1 coil pack go out and I lost some power but it never threw a code. Only use the correct OEM NGK spark plugs.

Weyne Masters · 10-20-2015, 05:58 PM

I had a code in P3 gauge ,unfortunately I cleared!

Patrón · 10-20-2015, 07:20 PM

Quote:

Originally Posted by Weyne Masters

I had a code in P3 gauge ,unfortunately I cleared!

Plug in your ess cable and see if the code is stored there.

Weyne Masters · 10-20-2015, 11:37 PM

Thanks i will do tomorow,review

Patrón · 10-21-2015, 09:47 AM

you need to post some pics of your car

Weyne Masters · 10-22-2015, 03:02 PM

Today I Hooked a Obd cable and done load that code ?.
So with that information,I should change the Sparks ,or O2 sensor?

Weyne Masters · 10-23-2015, 06:26 AM

Any body can help?

10-20-2015, 10:20 AM	#1
Weyne Masters Lieutenant 87 Rep 414 Posts Drives: M3 LIME ROCK VT2-625 Join Date: Jul 2013 Location: Brazil iTrader: (0)	Engine Hesitate 7,200 Rpm Hello guy,late weekend during the 1/2 roll race,I realize an engine hesitate about 7,200 just after shift 4 gear,after secs a car pull forward again. Car has 7.400 miles Sparks OEM(never change) Engine VT2-625 6,5 PSI Fuel 95 AKI+NF Race Octane Booster. Questions 1-could be a spark malfunction(pre ignition)? 2-could be a coil malfunction ? 3-Lets suppose it could cause by spark failure,HOW ABOUT THO CHANGE the SPARKS for a colder like HKS-M45HL ? Attached Images
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10-20-2015, 12:57 PM	#6
Patrón PAZUZU 560 Rep 2,058 Posts Drives: '15 M4 Join Date: Sep 2013 Location: San Antonio, TX iTrader: (1) Garage List 2015 BMW M4 [0.00] 2009 BMW M3 [10.00]	i'm not familiar with the octane booster but it could have fouled your O2s. do you have the stock cats/xpipe? __________________ 2009 M3 DCT ESS625+ SOLD 2015 M4 BSM/Silverstone F4LCON @texasMclub IG @jagemoets
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10-20-2015, 03:03 PM	#7
Longboarder Major General 3688 Rep 6,801 Posts Drives: 2016 BMW i8 Join Date: Dec 2006 Location: Monarch Beach iTrader: (1) Garage List 2012 BMW e92 M3 [0.00] 2021 BMW X5M [10.00] 2015 Porsche 991 Tu ... [10.00] 2015 Porsche 991 GT3 [10.00]	For ESS 625 or 650 the best thing is stock plugs and run 93 octane minimum with less than e25 and it will be perfectly reliable and make the most power this way. Octane boosters can foul our ion sensitive plugs fairly quickly - although one can of that stuff alone is unlikely to cause this type of issue. Also, too high of octane can cause the car to run slower/less power than simply good 93. __________________ Current BMWs: 2022 X5 40i, 2013 X5 35i 2015 Porsche 991 Turbo S 1979 Porsche 911 Turbo (930) a couple others IG: longboarder949; YouTube: https://www.youtube.com/channel/UCT1...eoFBszPIK0gf9w
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10-20-2015, 03:20 PM	#8
Weyne Masters Lieutenant 87 Rep 414 Posts Drives: M3 LIME ROCK VT2-625 Join Date: Jul 2013 Location: Brazil iTrader: (0)	Patron the car gás MS decats and straight pipes!
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10-20-2015, 03:22 PM	#9
Weyne Masters Lieutenant 87 Rep 414 Posts Drives: M3 LIME ROCK VT2-625 Join Date: Jul 2013 Location: Brazil iTrader: (0)	Fuel Quality Longboard tks for your help. About fuel has 95 AKI e25 on pump gas!
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10-20-2015, 03:31 PM	#10
Weyne Masters Lieutenant 87 Rep 414 Posts Drives: M3 LIME ROCK VT2-625 Join Date: Jul 2013 Location: Brazil iTrader: (0)	Fuel Quality About fuel we 100% of history off my car it has PODIUM 95AKI(e25%) on Pump gas.
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10-20-2015, 03:32 PM	#11
oolas3 Captain 402 Rep 876 Posts Drives: BMW Join Date: May 2015 Location: United States iTrader: (0)	If your spark plugs come out with an orange coating on them, it's from the octane boost. You don't want to use octane boost in these cars.
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10-20-2015, 04:52 PM	#12
Weyne Masters Lieutenant 87 Rep 414 Posts Drives: M3 LIME ROCK VT2-625 Join Date: Jul 2013 Location: Brazil iTrader: (0)	O2 sensor Do you believe the O2 sensor maybe affect? I did Not think in that possibility !!!
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10-20-2015, 05:58 PM	#14
Weyne Masters Lieutenant 87 Rep 414 Posts Drives: M3 LIME ROCK VT2-625 Join Date: Jul 2013 Location: Brazil iTrader: (0)	I had a code in P3 gauge ,unfortunately I cleared!
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10-20-2015, 11:37 PM	#16
Weyne Masters Lieutenant 87 Rep 414 Posts Drives: M3 LIME ROCK VT2-625 Join Date: Jul 2013 Location: Brazil iTrader: (0)	Thanks i will do tomorow,review
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10-21-2015, 09:47 AM	#17
Patrón PAZUZU 560 Rep 2,058 Posts Drives: '15 M4 Join Date: Sep 2013 Location: San Antonio, TX iTrader: (1) Garage List 2015 BMW M4 [0.00] 2009 BMW M3 [10.00]	you need to post some pics of your car __________________ 2009 M3 DCT ESS625+ SOLD 2015 M4 BSM/Silverstone F4LCON @texasMclub IG @jagemoets
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10-22-2015, 03:02 PM	#18
Weyne Masters Lieutenant 87 Rep 414 Posts Drives: M3 LIME ROCK VT2-625 Join Date: Jul 2013 Location: Brazil iTrader: (0)	Fail Code Today I Hooked a Obd cable and done load that code ?. So with that information,I should change the Sparks ,or O2 sensor? Attached Images
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10-23-2015, 06:26 AM	#19
Weyne Masters Lieutenant 87 Rep 414 Posts Drives: M3 LIME ROCK VT2-625 Join Date: Jul 2013 Location: Brazil iTrader: (0)	Any body can help?
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