1993 Rough Idle
Thread Starter
Instructor
Joined: May 2001
Posts: 169
Likes: 14
From: Columbus Ohio
1993 Rough Idle
I need help in diagnosing a slight rough idle problem....the car has been performing excellent over the past two years, but in the past two weeks I have been driving it every day and putting a lot of miles on it. I have developed a slight miss at idle which gets a little worse up to about 1500 rpm then disappears at 2000 rpm with the car in neutral. What systems and components might cause this slight-but annoying rough idle.
Safety Car
Joined: Aug 2002
Posts: 3,842
Likes: 230
From: SANTA CRUZ CA
Re: 1993 Rough Idle (WKNR)
It is recommended that you invest in a diagnostic trouble code reader (GROUNDING PLUGS at $40, or an ALDL for $80 from MIDAMERICA) and a shop manual to interpret the codes. They are very easy to use, and they will provide you with the info necessary to solve your problem.
Burning Brakes
Joined: Jan 2001
Posts: 1,169
Likes: 0
From: Manhattan
Re: 1993 Rough Idle (WKNR)
a common rough idle problem seems to be stuck or leaky fuel injectors. one way to test them is to check the impedence of each injector with a digital volt/ohm meter. i don't remeber what it should read, i think it's like 17ohms, but look for 1 or 2 that are way out of spec.
is your check engine light on? if so, it's throwing some codes. you can check them using a paper clip to ground 2 terminals (don't remember which ones) on the aldl under the dash and counting the flashes of the check engine light(?), kinda like morse code. don't recall all the details, it's a good idea to pick up a repair manual. i've used my haynes often. you can pick them up at the auto parts store
is your check engine light on? if so, it's throwing some codes. you can check them using a paper clip to ground 2 terminals (don't remember which ones) on the aldl under the dash and counting the flashes of the check engine light(?), kinda like morse code. don't recall all the details, it's a good idea to pick up a repair manual. i've used my haynes often. you can pick them up at the auto parts store
