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toyota Noah Rough Idle, please help
tom_boy
#1 Posted : Tuesday, August 02, 2011 11:46:05 PM
Rank: Member


Joined: 2/20/2007
Posts: 767
My toyota Noah has an interesting problem. It was running perfectly until I took it for kawaida service. The jerk of a mechanic could not get the oil filter out and so he decided to remove some components so as to reach the oil filter and then he put them back again. Immediately after this service, as in I did not even have to leave the garage, the car developed a rough idle. it also stutters and shudders for a few seconds before it picks up speed from standstill position. The rough idle is worse when the aircon is on or when it is in gear but stationary. A few times when reversing slowly, the engine actually goes off (the car is automatic). I have changed fuel filter, spark plugs and cleaned the intake manifold lakini problem persists. The jerk of a mechanic wanted to sell me a second hand oxygen sensor lakini I refused. The clue , I think is that it must be something he touched or removed on his way to the oil filter. Tafadhali saidieni....
They must find it difficult....... those who have taken authority as the truth, rather than truth as the authority. -G. Massey.
Foz00
#2 Posted : Wednesday, August 03, 2011 2:44:53 AM
Rank: Member


Joined: 1/13/2011
Posts: 297
Location: Nairobi
confirm that he plugged back the o2 sensor and reset the ecu. run a diagnostic
M3203
#3 Posted : Wednesday, August 03, 2011 3:24:26 AM
Rank: Hello


Joined: 6/8/2011
Posts: 6
Make sure all the park plug wires are snug pushed all the way in on both ends. Next check all vacuum lines around the area where he would have removed components to reach the filter and around the throttle body. Check the EGR valve and make sure its secured. These are the most likely causes of a rough idle.
tom_boy
#4 Posted : Wednesday, August 03, 2011 6:40:18 AM
Rank: Member


Joined: 2/20/2007
Posts: 767
Foz00 wrote:
confirm that he plugged back the o2 sensor and reset the ecu. run a diagnostic

Thanks Foz00, I know that the o2 sensor was plugged back in, lakini how does one reset the ecu? Where can I do proper diagnostics here in nairobi?

@M3203, thanks for the suggestions. The spark plug wires, I will recheck though I had confirmed they were okay..... unless one of them has a fracture huko ndani. I have tried to look for hanging lines or disconnected wires, even had a look with the mechanic but could find none. Where is the EGR valve located?Is it near the exhaust manifold in the toyota noah (old model). Will check it out and get back to you.
They must find it difficult....... those who have taken authority as the truth, rather than truth as the authority. -G. Massey.
jamplu
#5 Posted : Thursday, August 04, 2011 8:22:58 AM
Rank: Veteran


Joined: 3/25/2010
Posts: 939
Location: Nai
you can go to Concorde motors they run diagnostics but @4K. Did he touch the IACV?
tom_boy
#6 Posted : Thursday, August 04, 2011 12:56:06 PM
Rank: Member


Joined: 2/20/2007
Posts: 767

@ jamplu, concorde motors wako wapi?
They must find it difficult....... those who have taken authority as the truth, rather than truth as the authority. -G. Massey.
tom_boy
#7 Posted : Friday, November 23, 2012 1:07:13 PM
Rank: Member


Joined: 2/20/2007
Posts: 767
Discovered that the problem was a crack in one of the lead wires. Changed the wires and was good as new.

They must find it difficult....... those who have taken authority as the truth, rather than truth as the authority. -G. Massey.
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