Accleration Problem - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

skwan28 · 02-28-2007, 12:22 PM

Please bear with me because quite honestly I am a noobie when it comes to engine problems.

Ride: 240sx 89 fastback pretty much stock no recent engine work.

Problem: When I accelerate the car it begins shaking a little and doesnt pick up and when I am stopped and disengaged in neutral the engine shakes, it almost seems and feels like it is going to stall. However this is the catch it does this only after about 7-8 miles of driving (basically once engine warmed up). Before that time it works perfectly fine.

Things I tried:
-Replacing MAF exact same problem occurred
-Replaced with all new sparkplugs with sparkplug wires no change.
-Poured fuel cleaner in my gas tank

Things I plan to look at:
-EGR valve(was told to disconnect the top tube which connectes to the EGR metal housing to test if the car runs fine with it disconnected, possibly clean it with carb cleaner if it is the issue)

Please any suggestions would help if possible pictures of parts you guys are talking about, thanks in advance!

punxva · 02-28-2007, 05:31 PM

check your IACV, since it is doing it once it warms up completley, i am too busy atm to spoon feed the info to you, so just search for it, the acronym stands for Idle Air Control Valve

ALMOSTJDM · 02-28-2007, 05:37 PM

or it could be one of your injectors are bad

skwan28 · 03-01-2007, 03:45 PM

Thanks for your input and suggestions, I did a little research and found this nifty article so I decided to share with with other ppl who might have similar problems. http://autorepair.about.com/library/a/1i/bl289i.htm

Going to try to clean my throttle body as suggested by this article.

I also take a look at the fuel injectors.

s13gold · 03-01-2007, 03:50 PM

distributor cap and rotor.

leonb2004 · 03-01-2007, 05:00 PM

Coolant Temp Sensor, betcha a dollar.

grnappletree14 · 03-02-2007, 12:06 AM

it might be the u have a air leak. any kind of air that coming out like maybe from u pipe, or throttle body. make sure everything is pluged right. if ur not using a pipe cover it up. this happened to me. i has some air leaking through my intercooler piping. so i sealed off the hole and clamped everything togther. boom problem solved.

georgesal · 03-02-2007, 08:47 AM

+1 for coolant temp sensor

02-28-2007, 12:22 PM	#1
skwan28 Join Date: Jul 2003 Location: cali Posts: 32 Trader Rating: (0) Feedback Score: 0 reviews	Accleration Problem Please bear with me because quite honestly I am a noobie when it comes to engine problems. Ride: 240sx 89 fastback pretty much stock no recent engine work. Problem: When I accelerate the car it begins shaking a little and doesnt pick up and when I am stopped and disengaged in neutral the engine shakes, it almost seems and feels like it is going to stall. However this is the catch it does this only after about 7-8 miles of driving (basically once engine warmed up). Before that time it works perfectly fine. Things I tried: -Replacing MAF exact same problem occurred -Replaced with all new sparkplugs with sparkplug wires no change. -Poured fuel cleaner in my gas tank Things I plan to look at: -EGR valve(was told to disconnect the top tube which connectes to the EGR metal housing to test if the car runs fine with it disconnected, possibly clean it with carb cleaner if it is the issue) Please any suggestions would help if possible pictures of parts you guys are talking about, thanks in advance! __________________ signature exceeds forum limits.

03-01-2007, 03:45 PM	#4
skwan28 Join Date: Jul 2003 Location: cali Posts: 32 Trader Rating: (0) Feedback Score: 0 reviews	Thanks for your input and suggestions, I did a little research and found this nifty article so I decided to share with with other ppl who might have similar problems. http://autorepair.about.com/library/a/1i/bl289i.htm Going to try to clean my throttle body as suggested by this article. I also take a look at the fuel injectors. __________________ signature exceeds forum limits.

02-28-2007, 05:37 PM	#3
ALMOSTJDM Zilvia Member Join Date: Nov 2006 Location: SOCAL CA Age: 39 Posts: 212 Trader Rating: (0) Feedback Score: 0 reviews	or it could be one of your injectors are bad

03-01-2007, 03:50 PM	#5
s13gold Post Whore! Join Date: Jan 2007 Location: CARSON Posts: 4,240 Trader Rating: (79) Feedback Score: 79 reviews	distributor cap and rotor.

03-01-2007, 05:00 PM	#6
leonb2004 Leaky Injector Join Date: Feb 2005 Location: AL Posts: 71 Trader Rating: (0) Feedback Score: 0 reviews	Coolant Temp Sensor, betcha a dollar.

03-02-2007, 12:06 AM	#7
grnappletree14 BANNED Join Date: Aug 2006 Location: SOCAL/chino hills (909) Posts: 1,829 Trader Rating: (6) Feedback Score: 6 reviews	it might be the u have a air leak. any kind of air that coming out like maybe from u pipe, or throttle body. make sure everything is pluged right. if ur not using a pipe cover it up. this happened to me. i has some air leaking through my intercooler piping. so i sealed off the hole and clamped everything togther. boom problem solved.

03-02-2007, 08:47 AM	#8
georgesal BANNED Join Date: Oct 2006 Location: Los Angeles Age: 40 Posts: 842 Trader Rating: (2) Feedback Score: 2 reviews	+1 for coolant temp sensor