low idle warm 90 jeep 4.0
03-20-2006, 11:31 AM
#71
Guest
Posts: n/a
Re: low idle warm 90 jeep 4.0
If the TPS and MAP sensors have been changed, and TB is clean, I agree:
next thing to look at is the O2 sensors and their connections.
On that EGR, just for laughs, disconnect it temporarily and see if the
problem goes away, esp. if it was an aftermarket unit. After failing a
smog check on the beater last year, I discovered that the problem was a
$90 Napa EGR that I had just replaced. The shop guys told me that all
aftermarket EGR's were pure junk, and after installing an OEM unit, it
passed famously. I had another shop re-diagnose and repair the thing
to insure an accurate diagnosis. No obvious symptoms like you
describe, but it's worth looking at.
next thing to look at is the O2 sensors and their connections.
On that EGR, just for laughs, disconnect it temporarily and see if the
problem goes away, esp. if it was an aftermarket unit. After failing a
smog check on the beater last year, I discovered that the problem was a
$90 Napa EGR that I had just replaced. The shop guys told me that all
aftermarket EGR's were pure junk, and after installing an OEM unit, it
passed famously. I had another shop re-diagnose and repair the thing
to insure an accurate diagnosis. No obvious symptoms like you
describe, but it's worth looking at.
03-20-2006, 11:31 AM
#72
Guest
Posts: n/a
Re: low idle warm 90 jeep 4.0
If the TPS and MAP sensors have been changed, and TB is clean, I agree:
next thing to look at is the O2 sensors and their connections.
On that EGR, just for laughs, disconnect it temporarily and see if the
problem goes away, esp. if it was an aftermarket unit. After failing a
smog check on the beater last year, I discovered that the problem was a
$90 Napa EGR that I had just replaced. The shop guys told me that all
aftermarket EGR's were pure junk, and after installing an OEM unit, it
passed famously. I had another shop re-diagnose and repair the thing
to insure an accurate diagnosis. No obvious symptoms like you
describe, but it's worth looking at.
next thing to look at is the O2 sensors and their connections.
On that EGR, just for laughs, disconnect it temporarily and see if the
problem goes away, esp. if it was an aftermarket unit. After failing a
smog check on the beater last year, I discovered that the problem was a
$90 Napa EGR that I had just replaced. The shop guys told me that all
aftermarket EGR's were pure junk, and after installing an OEM unit, it
passed famously. I had another shop re-diagnose and repair the thing
to insure an accurate diagnosis. No obvious symptoms like you
describe, but it's worth looking at.
03-20-2006, 11:31 AM
#73
Guest
Posts: n/a
Re: low idle warm 90 jeep 4.0
If the TPS and MAP sensors have been changed, and TB is clean, I agree:
next thing to look at is the O2 sensors and their connections.
On that EGR, just for laughs, disconnect it temporarily and see if the
problem goes away, esp. if it was an aftermarket unit. After failing a
smog check on the beater last year, I discovered that the problem was a
$90 Napa EGR that I had just replaced. The shop guys told me that all
aftermarket EGR's were pure junk, and after installing an OEM unit, it
passed famously. I had another shop re-diagnose and repair the thing
to insure an accurate diagnosis. No obvious symptoms like you
describe, but it's worth looking at.
next thing to look at is the O2 sensors and their connections.
On that EGR, just for laughs, disconnect it temporarily and see if the
problem goes away, esp. if it was an aftermarket unit. After failing a
smog check on the beater last year, I discovered that the problem was a
$90 Napa EGR that I had just replaced. The shop guys told me that all
aftermarket EGR's were pure junk, and after installing an OEM unit, it
passed famously. I had another shop re-diagnose and repair the thing
to insure an accurate diagnosis. No obvious symptoms like you
describe, but it's worth looking at.
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