Low idle, fouled plugs, souttery acceleration
10-02-20, 05:02 PM
#1
Rookie
Thread Starter
Low idle, fouled plugs, souttery acceleration
99 LS400 with 170k miles.
I recently did alot of work to the car and when it was put back together, I experienced some really rough running. I changed all the spark plugs with NGK iridiums which helped alot, but after maybe 15 seconds of driving my car started dipping its idle to maybe 100-200 rpm and sputtering on acceleration. I pulled the spark plugs to find every single one was black with soot. I plan on reading the codes very soon, but until then, does anybody have any suggestions or thoughts about what could possibly be the problem?
I recently did alot of work to the car and when it was put back together, I experienced some really rough running. I changed all the spark plugs with NGK iridiums which helped alot, but after maybe 15 seconds of driving my car started dipping its idle to maybe 100-200 rpm and sputtering on acceleration. I pulled the spark plugs to find every single one was black with soot. I plan on reading the codes very soon, but until then, does anybody have any suggestions or thoughts about what could possibly be the problem?
10-04-20, 09:49 AM
#3
Lexus Champion
99 LS400 with 170k miles.
I recently did alot of work to the car and when it was put back together, I experienced some really rough running. I changed all the spark plugs with NGK iridiums which helped alot, but after maybe 15 seconds of driving my car started dipping its idle to maybe 100-200 rpm and sputtering on acceleration. I pulled the spark plugs to find every single one was black with soot. I plan on reading the codes very soon, but until then, does anybody have any suggestions or thoughts about what could possibly be the problem?
I recently did alot of work to the car and when it was put back together, I experienced some really rough running. I changed all the spark plugs with NGK iridiums which helped alot, but after maybe 15 seconds of driving my car started dipping its idle to maybe 100-200 rpm and sputtering on acceleration. I pulled the spark plugs to find every single one was black with soot. I plan on reading the codes very soon, but until then, does anybody have any suggestions or thoughts about what could possibly be the problem?
Meanwhile, read this post in its entirety;
https://www.clublexus.com/forums/ls-...olls-eyes.html
Last edited by YODAONE; 10-04-20 at 10:05 AM.
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