Cant pass 50-55 mph/?? Whyyy! HELPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP PPPP - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Nibras · 06-05-2011, 11:52 AM

alright so i've been trying to figure this out for a while now .

i bought this ca18det from someone who fried there wireharness and fried the ecu

i bought another ecu and got the harness re wired. i finished setting up the car and have been test driving it.

the car will not exceede 50-55 mph and when i reach those speed the car basically stops and alot of smoke comes out of the exaust for about 5 seconds the smoke is a white to blue color. i see smoke come from the turbo flange too. sometimes the car will stall out aswell when i try to exceede it. the car catches anything under those speed in all gears

possibly bad maf? or ecu?

ANY input will help.

bc. · 06-05-2011, 02:42 PM

I don't think it has anything to do with your speed, maybe just load on the engine? How fast can you go in 4th gear? 3rd? White smoke would indicate that you are burning coolant, can you verify this? Could be a blown seal in the turbo or a blown head gasket, although you would have serious problems before you got up to 50mph.

ILoveMyRHS13 · 06-05-2011, 03:24 PM

I know my buddy had a similar issue one time coming back from a drift event. The car wouldn't boost at all and wouldn't go over 55mph. Turns out there was a vacuum hose not connected to the bottom of the intake manifold. Check there, I don't know if it's the same problem, but it's worth a shot.

Nibras · 06-05-2011, 03:31 PM

Quote:

Originally Posted by bc.

I don't think it has anything to do with your speed, maybe just load on the engine? How fast can you go in 4th gear? 3rd? White smoke would indicate that you are burning coolant, can you verify this? Could be a blown seal in the turbo or a blown head gasket, although you would have serious problems before you got up to 50mph.

it doesnt matter what gear i am in once im at 50-55 mph it will do it , i can be in 4th at 3100 rpm and it will do it as if im in 5tg at 2500 rpm then it will do it

Nibras · 06-05-2011, 03:33 PM

Quote:

Originally Posted by ILoveMyRHS13

I know my buddy had a similar issue one time coming back from a drift event. The car wouldn't boost at all and wouldn't go over 55mph. Turns out there was a vacuum hose not connected to the bottom of the intake manifold. Check there, I don't know if it's the same problem, but it's worth a shot.

the car will boost up fine ive checked all; vacume lines everything is connected and what not, im CONFUSEDDDD

Nibras · 06-09-2011, 08:41 AM

anyone elseee? im posting a video later on off the symptoms

JDMRIDDAZ · 06-09-2011, 03:05 PM

check ecu for codes

NYTwo4tee · 06-09-2011, 08:30 PM

Your car is afraid to speed on the highway, just tell it to sack up!

honestly I couldn't tell you I'm trying to get my idle good here but I'd start with the simple stuff you would possibly over look, codes, leaks, double check the wiring? could be a paint but you never know

Nibras · 06-10-2011, 09:21 AM

im not getting any codes , wiring is all good , and lol you're a clown Nyt

steve shadows · 06-10-2011, 01:41 PM

Have you done a vacuum leak check yet?

06-05-2011, 11:52 AM	#1
Nibras Zilvia Junkie Join Date: Mar 2009 Location: Orlando , FL Age: 34 Posts: 450 Trader Rating: (2) Feedback Score: 2 reviews	Cant pass 50-55 mph/?? Whyyy! HELPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP PPPPP alright so i've been trying to figure this out for a while now . i bought this ca18det from someone who fried there wireharness and fried the ecu i bought another ecu and got the harness re wired. i finished setting up the car and have been test driving it. the car will not exceede 50-55 mph and when i reach those speed the car basically stops and alot of smoke comes out of the exaust for about 5 seconds the smoke is a white to blue color. i see smoke come from the turbo flange too. sometimes the car will stall out aswell when i try to exceede it. the car catches anything under those speed in all gears possibly bad maf? or ecu? ANY input will help. Last edited by Nibras; 06-05-2011 at 01:03 PM..

06-09-2011, 03:05 PM	#7
JDMRIDDAZ Zilvia Junkie Join Date: Sep 2007 Location: ｆォリダ Age: 47 Posts: 440 Trader Rating: (3) Feedback Score: 3 reviews	check ecu for codes __________________ シチサｎ w/ka20det:in progress シチサｎw/sr20det:stolen

06-10-2011, 01:41 PM	#10
steve shadows Post Whore! Join Date: Aug 2003 Location: LA and OC Posts: 8,202 Trader Rating: (5) Feedback Score: 5 reviews	Have you done a vacuum leak check yet? __________________ Like Me on FaceBook !

06-05-2011, 02:42 PM	#2
bc. Zilvia Addict Join Date: Aug 2010 Location: St. Louis Posts: 868 Trader Rating: (0) Feedback Score: 0 reviews	I don't think it has anything to do with your speed, maybe just load on the engine? How fast can you go in 4th gear? 3rd? White smoke would indicate that you are burning coolant, can you verify this? Could be a blown seal in the turbo or a blown head gasket, although you would have serious problems before you got up to 50mph.

06-09-2011, 08:41 AM	#6
Nibras Zilvia Junkie Join Date: Mar 2009 Location: Orlando , FL Age: 34 Posts: 450 Trader Rating: (2) Feedback Score: 2 reviews	anyone elseee? im posting a video later on off the symptoms

06-09-2011, 08:30 PM	#8
NYTwo4tee Join Date: May 2011 Location: Upstate, New York Age: 32 Posts: 28 Trader Rating: (0) Feedback Score: 0 reviews	Your car is afraid to speed on the highway, just tell it to sack up! honestly I couldn't tell you I'm trying to get my idle good here but I'd start with the simple stuff you would possibly over look, codes, leaks, double check the wiring? could be a paint but you never know

06-10-2011, 09:21 AM	#9
Nibras Zilvia Junkie Join Date: Mar 2009 Location: Orlando , FL Age: 34 Posts: 450 Trader Rating: (2) Feedback Score: 2 reviews	im not getting any codes , wiring is all good , and lol you're a clown Nyt