Replace Fuel Injectors how often?
#16
Driver School Candidate
Thread Starter
Join Date: Oct 2006
Location: ca
Posts: 31
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
The intake doesnt have to come off for the injectors, as the injector rails must come out before the intake does. It will take you at most 30-45 minutes to have the covers, TB removed and replace the dizzys, rotors, and plugs. It's pretty easy actually, you don't even have to take the serp belt off.
#19
Instructor
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
Then why does the autoshop have 5 hours quoted for removing and reinistalling the fuel injectors? One problem for me is that I've never removed fuel injectors, spark plugs or anything of the sort on a car before. It kind of sucks that my first real work in the engine bay of a car is going to be on an LS400 which is far more complicated than say a Civic of the Same year..
Remove air intake, spark plug covers, throttle body, disconnect anything egr related including the back egr passage, remove the upper intake, basically your fuel rail is accessable. I can't imagine it taking anyone longer than 5 hours to replace all 8 of them, if everything goes to plan. Research, and tackle it. Good luck.
#21
Driver School Candidate
Thread Starter
Join Date: Oct 2006
Location: ca
Posts: 31
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
hey btw, has anybody ever carefully examined their Smog Check to see future potential problems with their car? I'm looking at a 2007 smog check and notice that while it does pass, it's slightly rich at 15mph but more lean than average at 25mph. (High HC vs High NOX)
#22
Lexus Champion
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
Then why does the autoshop have 5 hours quoted for removing and reinistalling the fuel injectors? One problem for me is that I've never removed fuel injectors, spark plugs or anything of the sort on a car before. It kind of sucks that my first real work in the engine bay of a car is going to be on an LS400 which is far more complicated than say a Civic of the Same year..
have you checked for vac leaks yet with some carb cleaner?
#24
Driver School Candidate
Thread Starter
Join Date: Oct 2006
Location: ca
Posts: 31
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
Why don't I just try disconnecting them and see if the problem goes away? When a car is warming up, it isn't suppose to be reading from the O2 sensors, which technically would mean that if it were O2 related, the issue would only happen after the car is warmed up and or when the O2 sensors are at acceptable temperatures.
#25
Lexus Champion
iTrader: (4)
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
that makes no sense...the light will come back on when it warms up either way....go have it looked at and stop guessing, u have spent more time posting and trying to avoid having it fixed properly then if u just took it and had it fixed, the fact is this...when u have a problem with ur car or anyone for that matter and a post is made about it, people can only give suggestions based on knowledge and/or personal experience, no one can ever tell u for sure what wrong with ur car without looking at it and running tests that will determine the exact cause....
#26
Driver School Candidate
Thread Starter
Join Date: Oct 2006
Location: ca
Posts: 31
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
that makes no sense...the light will come back on when it warms up either way....go have it looked at and stop guessing, u have spent more time posting and trying to avoid having it fixed properly then if u just took it and had it fixed, the fact is this...when u have a problem with ur car or anyone for that matter and a post is made about it, people can only give suggestions based on knowledge and/or personal experience, no one can ever tell u for sure what wrong with ur car without looking at it and running tests that will determine the exact cause....
Also I am avoiding having it "professionally fixed" because I'll be paying through the nose in order to have them improperly diagnose it. Anyway if I can't fix the car myself, I have no business owning this car because it's prohibitively expensive to fix otherwise.
Last edited by goku2; 05-18-09 at 03:03 PM.
#27
Lexus Champion
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
why assume it would be improperly diagnosed if you are paying a professional to do it? a professional mechanic will stnad behind their diag. and if it's wrong, the y'll eat it and try again for free. that's at any reputable shop including the dealer. spend the 1 hour diag fee and then you'll know for sure. it's cheaper than throwing parts at it and wasting time.
#28
Lexus Champion
iTrader: (4)
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
Learn to read! I said the check engine light has gone away, but the car is performing a bit better. It misfires at all speeds and loads, cold or warm, sometimes you can really feel the effects of the misfiring and sometimes you can't. It most definitely doesn't misfire when going into DFCO (duh). I also noticed that (before getting rid of the light) when I reset the computer so there was no code, the check engine light would not come on if it was just idling, but when it was driven like under load. Now however, after the italian tuneup, it doesn't come on AT ALL, under any circumstance which to me says it's related to the injectors and not something like the O2 sensors.
Also I am avoiding having it "professionally fixed" because I'll be paying through the nose in order to have them improperly diagnose it. Anyway if I can't fix the car myself, I have no business owning this car because it's prohibitively expensive to fix otherwise.
Also I am avoiding having it "professionally fixed" because I'll be paying through the nose in order to have them improperly diagnose it. Anyway if I can't fix the car myself, I have no business owning this car because it's prohibitively expensive to fix otherwise.
#29
Lead Lap
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
Based on my 19+ years experience with Lexus LS cars, I'd bet my Lexus trained mechanic Fred could figure out this problem in short order with his decades of knowledge and his diagnostic skills and tools.
Developing a relationship with a good Lexus shop can save a lot of guessing and especially a lot of money. I've seen cases where stored codes didn't even point to the cause of a particular problem -- some error codes are like a "phantom" of a non-existing or temporary problem ... an anomaly.
I'm reminded that the worst the gen 1 LS400 I used to have ever ran (no power, wacky idle) was at the 13 year mark when wires broke in the left trunk hinge. In fact, except for once when the alternator failed from leaking PS pump fluid, that was the only time that car ever ran improperly during the 13 1/2 years I owned it -- drove it from new until over 183,000 miles and it ran (and looked) like new when I sold it.
We all like to figure out problems for ourselves but we seem to be all over the map in this thread.
There is no shame in occasionally taking a car to a professional mechanic. There are some great ones around who are honest to boot.
Developing a relationship with a good Lexus shop can save a lot of guessing and especially a lot of money. I've seen cases where stored codes didn't even point to the cause of a particular problem -- some error codes are like a "phantom" of a non-existing or temporary problem ... an anomaly.
I'm reminded that the worst the gen 1 LS400 I used to have ever ran (no power, wacky idle) was at the 13 year mark when wires broke in the left trunk hinge. In fact, except for once when the alternator failed from leaking PS pump fluid, that was the only time that car ever ran improperly during the 13 1/2 years I owned it -- drove it from new until over 183,000 miles and it ran (and looked) like new when I sold it.
We all like to figure out problems for ourselves but we seem to be all over the map in this thread.
There is no shame in occasionally taking a car to a professional mechanic. There are some great ones around who are honest to boot.
#30
Driver School Candidate
Thread Starter
Join Date: Oct 2006
Location: ca
Posts: 31
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
Based on my 19+ years experience with Lexus LS cars, I'd bet my Lexus trained mechanic Fred could figure out this problem in short order with his decades of knowledge and his diagnostic skills and tools.
Developing a relationship with a good Lexus shop can save a lot of guessing and especially a lot of money. I've seen cases where stored codes didn't even point to the cause of a particular problem -- some error codes are like a "phantom" of a non-existing or temporary problem ... an anomaly.
I'm reminded that the worst the gen 1 LS400 I used to have ever ran (no power, wacky idle) was at the 13 year mark when wires broke in the left trunk hinge. In fact, except for once when the alternator failed from leaking PS pump fluid, that was the only time that car ever ran improperly during the 13 1/2 years I owned it -- drove it from new until over 183,000 miles and it ran (and looked) like new when I sold it.
We all like to figure out problems for ourselves but we seem to be all over the map in this thread.
There is no shame in occasionally taking a car to a professional mechanic. There are some great ones around who are honest to boot.
Developing a relationship with a good Lexus shop can save a lot of guessing and especially a lot of money. I've seen cases where stored codes didn't even point to the cause of a particular problem -- some error codes are like a "phantom" of a non-existing or temporary problem ... an anomaly.
I'm reminded that the worst the gen 1 LS400 I used to have ever ran (no power, wacky idle) was at the 13 year mark when wires broke in the left trunk hinge. In fact, except for once when the alternator failed from leaking PS pump fluid, that was the only time that car ever ran improperly during the 13 1/2 years I owned it -- drove it from new until over 183,000 miles and it ran (and looked) like new when I sold it.
We all like to figure out problems for ourselves but we seem to be all over the map in this thread.
There is no shame in occasionally taking a car to a professional mechanic. There are some great ones around who are honest to boot.
Hey if you guys can, please post your Smog Check results! It would make sense to me that you can figure out how well your car is performing or see upcoming issues by looking at the smog check report.