Problems on start Built Engine - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

smit666 · 11-12-2020, 12:09 AM

been having issues recently after getting my car back after building the engine.

IAG stage 2 short block 10:1 Comp SBD 500x Turbo

The engine is fully broken in and runs perfectly fine besides when i start it.
Occasionally has misfires but hasent had that problem in a couple weeks or so.
is really choppy and wants to stumble or stalls the first minute or so when i start after that it clears out and is fine.

ive checked for vacuum leaks and have found none, spark plugs are brand new, i have new injectors.

recently cleaned the throttle body but with no luck. car is tuned by bill @Delicoustunning and hes just as confused as me. ive sent him over 10 start up logs and nothing can fix this. as i said ive checked everything i know of that would be causeing this issue and browsed multiple forums trying to fix it. also my pi and di scaling is all correct so thats not causing the issue and as i stated it only happens on cold starts and start ups other then that it runs perfect.

if anyone else was having this problem and knows how to fix it please let me know.

Tonrogs · 11-13-2020, 08:21 PM

I have the same issue. I still have yet to figure it out after 2 seasons of driving it and pulling the motor apart multiple times. I've swapped numerous sensors and parts from my original engine and never was able to figure it out.

DarkPira7e · 11-13-2020, 08:44 PM

Try putting the stock MAP sensor back in and see what happens. Maybe Bill forgot the MAP scaling somehow?

glorydays · 11-16-2020, 05:10 PM

I had similar issues. i replaced my MAF sensor ($270) which helped a little, then I switched tuners to Zach at counterspace... no issues since.

jflogerzi · 11-19-2020, 08:10 AM

Quote:

Originally Posted by glorydays

I had similar issues. i replaced my MAF sensor ($270) which helped a little, then I switched tuners to Zach at counterspace... no issues since.

While Zach is great(I am tuned with him) bill is just as good. Bill will get him sorted.

Sent from my GM1915 using Tapatalk

jcw99 · 11-19-2020, 12:19 PM

Tried using IAG? I'm always happy with the work they do for me.

11-12-2020, 12:09 AM	#1
smit666 Junior Member Join Date: Mar 2020 Drives: frs Location: Pennsylvania Posts: 5 Thanks: 0 Thanked 0 Times in 0 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Problems on start Built Engine been having issues recently after getting my car back after building the engine. IAG stage 2 short block 10:1 Comp SBD 500x Turbo The engine is fully broken in and runs perfectly fine besides when i start it. Occasionally has misfires but hasent had that problem in a couple weeks or so. is really choppy and wants to stumble or stalls the first minute or so when i start after that it clears out and is fine. ive checked for vacuum leaks and have found none, spark plugs are brand new, i have new injectors. recently cleaned the throttle body but with no luck. car is tuned by bill @Delicoustunning and hes just as confused as me. ive sent him over 10 start up logs and nothing can fix this. as i said ive checked everything i know of that would be causeing this issue and browsed multiple forums trying to fix it. also my pi and di scaling is all correct so thats not causing the issue and as i stated it only happens on cold starts and start ups other then that it runs perfect. if anyone else was having this problem and knows how to fix it please let me know. Last edited by smit666; 11-12-2020 at 12:12 AM. Reason: added more info

11-13-2020, 08:21 PM	#2
Tonrogs Senior Member Join Date: Apr 2018 Drives: 2014 BRZ Limited, Satin White Pearl Location: WI, 53593 Posts: 106 Thanks: 10 Thanked 40 Times in 30 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	I have the same issue. I still have yet to figure it out after 2 seasons of driving it and pulling the motor apart multiple times. I've swapped numerous sensors and parts from my original engine and never was able to figure it out. __________________ '14 SWP BRZ 6MT \| FBM built 9:1cr engine w/ GTX3076R Turbo \| Mazworx CD009 trans swap \| EcuTek \| Jackson Racing Dual Oil Cooler/Radiator \| SPAL fans \| JDL 3" Dual Resonated OP/FP \| Perrin 3" \| Radium Dual Cans \| 18" Rota Titans \| M85 3.73 diff \| DSS 1k axles \| And more....too much more....ugh.

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11-13-2020, 08:44 PM	#3
DarkPira7e Rust bucket enthusiast Join Date: Feb 2017 Drives: 2013 Turbo Firestorm FRS Location: Vermont Posts: 3,934 Thanks: 3,200 Thanked 4,095 Times in 2,045 Posts Mentioned: 31 Post(s) Tagged: 0 Thread(s)	Try putting the stock MAP sensor back in and see what happens. Maybe Bill forgot the MAP scaling somehow?

11-16-2020, 05:10 PM	#4
glorydays Remember me? Join Date: Dec 2011 Drives: BRZ Series.Blue Location: Honolulu, HI Posts: 483 Thanks: 259 Thanked 105 Times in 68 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	I had similar issues. i replaced my MAF sensor ($270) which helped a little, then I switched tuners to Zach at counterspace... no issues since.

11-19-2020, 12:19 PM	#6
jcw99 Senior Member Join Date: Jun 2014 Drives: swp mt '14 brz premium Location: 20872 Posts: 166 Thanks: 2,195 Thanked 111 Times in 75 Posts Mentioned: 6 Post(s) Tagged: 0 Thread(s)	Tried using IAG? I'm always happy with the work they do for me.

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