Need help with hesitation and rough idle - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

lsonboost · 08-11-2005, 05:53 AM

Ok ever since i got this car (89 240sx se manual) when it has been sitting for a few hours, and you start it, it has a very rough idle, I changed plugs and it made it somewhat worse but it is fine after a minute or so. Also I have a hesitation at partial throttle when it is cold, but after a minute or so of driving it is fine. The last problem I have is my speedometer, It works sometimes right away when you start driving but then it stops, until you drive it for around 30 min then it will start again, I have had the gauge cluster out twice to look for bad connection but everything seems fine. I have searched for answers for all these questions but i cant find any problems exactly like these.

EdmondDontess · 08-11-2005, 04:56 PM

Speedo - did you check the tranny speed sensor & harness? right near the driveshaft input

rought idle - Ive seen similar activity on KA's with vacuum leaks, or corrosion in the MAF harness.

not sure if it helps, but thats what i would check out.

good luck

lsonboost · 08-12-2005, 06:25 AM

the rough idle is only on startup so i dont know about the maf wires also what is the best way to clean the throttle body i have build up on it about 1/8" thick

KingKong8247 · 08-29-2007, 04:51 PM

Sorry to bump this from a while ago.

Ever figure out the problem?

JesusFreakDrifter · 08-29-2007, 05:32 PM

check your ecu, pop out your passenger kick panel and unscrew the ecu from its mount, and then turn it around, your will need a flat head screw driver and read the label. then check what the code is throwing.

ex. long beep equals 10, short beep 1
(ie) Beeeep Beeeep Beeeep, Beep Beep Beep Beep
34
try it and then go from there

worangejuice · 08-29-2007, 06:39 PM

1. wiggle your maf plug, press it further into the MAF.
2. Seafoeam your aiiv
3. Check your speedo harness under your car
SEARCH
FSM (factory service manual)
egr malfunction
seafoam on Nicoclub.com
stalling, rough idle

tons of write-ups and procedures, arm yourself with a FSM (factory service manual) go from there.

08-11-2005, 05:53 AM	#1
lsonboost Leaky Injector Join Date: Jul 2005 Location: Chicago Age: 40 Posts: 76 Trader Rating: (0) Feedback Score: 0 reviews	Need help with hesitation and rough idle Ok ever since i got this car (89 240sx se manual) when it has been sitting for a few hours, and you start it, it has a very rough idle, I changed plugs and it made it somewhat worse but it is fine after a minute or so. Also I have a hesitation at partial throttle when it is cold, but after a minute or so of driving it is fine. The last problem I have is my speedometer, It works sometimes right away when you start driving but then it stops, until you drive it for around 30 min then it will start again, I have had the gauge cluster out twice to look for bad connection but everything seems fine. I have searched for answers for all these questions but i cant find any problems exactly like these.

08-29-2007, 04:51 PM	#4
KingKong8247 Zilvia Junkie Join Date: Mar 2002 Location: Jersey Age: 40 Posts: 555 Trader Rating: (0) Feedback Score: 0 reviews	Sorry to bump this from a while ago. Ever figure out the problem? __________________ 90 240sx Coupe

08-29-2007, 06:39 PM	#6
worangejuice Zilvia FREAK! Join Date: Nov 2005 Location: WeeeHoooo,CA Age: 45 Posts: 1,519 Trader Rating: (10) Rides Gallery: worangejuice Feedback Score: 10 reviews	1. wiggle your maf plug, press it further into the MAF. 2. Seafoeam your aiiv 3. Check your speedo harness under your car SEARCH FSM (factory service manual) egr malfunction seafoam on Nicoclub.com stalling, rough idle tons of write-ups and procedures, arm yourself with a FSM (factory service manual) go from there. __________________

08-11-2005, 04:56 PM	#2
EdmondDontess Join Date: Aug 2005 Location: echo park Posts: 7 Trader Rating: (0) Feedback Score: 0 reviews	Speedo - did you check the tranny speed sensor & harness? right near the driveshaft input rought idle - Ive seen similar activity on KA's with vacuum leaks, or corrosion in the MAF harness. not sure if it helps, but thats what i would check out. good luck

08-12-2005, 06:25 AM	#3
lsonboost Leaky Injector Join Date: Jul 2005 Location: Chicago Age: 40 Posts: 76 Trader Rating: (0) Feedback Score: 0 reviews	the rough idle is only on startup so i dont know about the maf wires also what is the best way to clean the throttle body i have build up on it about 1/8" thick

08-29-2007, 05:32 PM	#5
JesusFreakDrifter Zilvia Addict Join Date: Jan 2006 Location: fort lauderdale Posts: 975 Trader Rating: (0) Feedback Score: 0 reviews	check your ecu, pop out your passenger kick panel and unscrew the ecu from its mount, and then turn it around, your will need a flat head screw driver and read the label. then check what the code is throwing. ex. long beep equals 10, short beep 1 (ie) Beeeep Beeeep Beeeep, Beep Beep Beep Beep 34 try it and then go from there