Trouble shooting boost problem

elperuano · 06-01-2018, 11:10 PM

What's up guys,
Ran into my first problem after 2 years almost 3.
Hoping to get some ideas on where to start. Here's my build.

08 g37s coupe.
Rods and pistons
BP kit with upgraded 6766 turbo 1.43 ar housing.
Cjm 1.5 RFS system.
Ecutek

Making a 400 mile round trip car was running fine. Hitting full boost no problem. Soon as I get off highway car makes no boost. Running pig rich. Sounds like a wrx.
Where should I start? Coupler? Plugs? Turbo?
Turbo has about 15k miles on it. Got home fine just running really rich. At idle, runs fine.

Thanks for the suggestions and advice!

TopgunZ · 06-02-2018, 07:52 AM

Coupler blew off.

Jinxx · 06-02-2018, 12:57 PM

Quote:

Originally Posted by TopgunZ

Coupler blew off.

+1 ...I would look at the couplings around the steering knuckle ....if it is closer to the throttle bodies car would prolly shut off ....or at least It did when it came off the throttle body on mine

BboyZ · 06-02-2018, 12:59 PM

Quote:

Originally Posted by TopgunZ

Coupler blew off.

Yes, that the first thing I would start. It happen to me once on my boosted RSX.

elperuano · 06-02-2018, 04:08 PM

Actually I was mistaken. Car seems to be running lean. Dips to 15-17s afr while cruising.

JIN2012 · 06-04-2018, 10:26 AM

Quote:

Originally Posted by elperuano

Actually I was mistaken. Car seems to be running lean. Dips to 15-17s afr while cruising.

This happened to me once on my boosted S2000 , it was a spark plug that came loose after a hard run. Apparently I under torqued it.

06-01-2018, 11:10 PM	#1 (permalink)
elperuano A True Z Fanatic Join Date: Oct 2011 Location: Southwest FL Posts: 1,374 Drives: G37S Rep Power: 29	Trouble shooting boost problem What's up guys, Ran into my first problem after 2 years almost 3. Hoping to get some ideas on where to start. Here's my build. 08 g37s coupe. Rods and pistons BP kit with upgraded 6766 turbo 1.43 ar housing. Cjm 1.5 RFS system. Ecutek Making a 400 mile round trip car was running fine. Hitting full boost no problem. Soon as I get off highway car makes no boost. Running pig rich. Sounds like a wrx. Where should I start? Coupler? Plugs? Turbo? Turbo has about 15k miles on it. Got home fine just running really rich. At idle, runs fine. Thanks for the suggestions and advice!

06-02-2018, 07:52 AM	#2 (permalink)
TopgunZ A True Z Fanatic Join Date: Jun 2012 Location: Minneapolis Posts: 2,651 Drives: 06 350Z , 09 370Z MT Rep Power: 6834	Coupler blew off. Chuck33079 likes this. __________________ ROTREX SUPERCHARGER TUNER KITS - $6799/ CUSTOM STILLEN AIR TO AIR KITS -$2100/ 700+ WHP!! WWW.TOPGUNSPEEDWORKS.COM

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06-02-2018, 04:08 PM	#5 (permalink)
elperuano A True Z Fanatic Join Date: Oct 2011 Location: Southwest FL Posts: 1,374 Drives: G37S Rep Power: 29	Actually I was mistaken. Car seems to be running lean. Dips to 15-17s afr while cruising.