Why does it still Miss, even after new Plugs and Wires?
Senior Member
Joined: Oct 2004
Posts: 2,044
From: Washington State
Yes, it is MAF sensor in the photos. It is interesting that the engine runs with the MAF unplugged and it still misses. Does it miss more or less or about the same amount at the same operating conditions?
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Joined: Apr 2014
Posts: 43
In the 5 miles that I ran it with the MAF unplugged, it ran about the same WHILE DRIVING.
It did, however, show a miss while at Idle. When the MAF is plugged in, there is no noticeable miss at idle.
Maybe, however, that's just because of my lack of sensitivity. (No, that's not what my ex-wife said.)
Driving today, I couldn't really point toward the problem being related to RPM or MPH.
I'll continue evaluating.
I'm thinking it could be the TPS... seems like more missing when the gas pedal is AT a certain level.
Now, I gotta' research how to Test that TPS with my Ohmmeter.
I'll try to do that whilst visiting a friend over the next few days.
Many thanks.
It did, however, show a miss while at Idle. When the MAF is plugged in, there is no noticeable miss at idle.
Maybe, however, that's just because of my lack of sensitivity. (No, that's not what my ex-wife said.)
Driving today, I couldn't really point toward the problem being related to RPM or MPH.
I'll continue evaluating.
I'm thinking it could be the TPS... seems like more missing when the gas pedal is AT a certain level.
Now, I gotta' research how to Test that TPS with my Ohmmeter.
I'll try to do that whilst visiting a friend over the next few days.
Many thanks.
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Joined: Apr 2014
Posts: 43
Thanks, Mr. Hunter, for that video. It was a bit difficult, but I watched the entire 28 minutes. That guy sure is full of himself. Some valuable info there, though.
I'm now 500 miles away. The CEL came on about 100 miles ago. Haven't yet gone to a Pep Boys to see what the code is.
I'll keep yous posted. Thanks.
I'm now 500 miles away. The CEL came on about 100 miles ago. Haven't yet gone to a Pep Boys to see what the code is.
I'll keep yous posted. Thanks.
Senior Member
Joined: Oct 2004
Posts: 2,044
From: Washington State
That is actually good, because it may help to pinpoint the direction where to look. So far we were looking for a black cat in the dark room 
When you read the DTS codes, make sure to record all parameters of the Freeze Frame.
When you read the DTS codes, make sure to record all parameters of the Freeze Frame.
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Joined: Apr 2014
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I apologize for the late reply, people, but I thought I'd tell yous what the problem actually was.
A friend (who knows more about mechanics than I do) drove it around the block,
and he figured that the engine is running just fine. Nothing wrong there.
The problem, he surmised, is somewhere in the drive train. Either tranny or drive shaft or differential.
So, we parked, got under the car, and found that the drive shaft moves laterally very easily.
Turns out that the entire problem was the Carrier Bearing. I've never even heard of that thing before.
It holds the drive shaft, halfway between the tranny and the rear end.
The drive shaft was shaking / vibrating at a certain RPM / Speed.
Replaced the carrier bearing... problem solved. All is well.
Thanks very much for all of your input, people. We had a tricky one, here.
A friend (who knows more about mechanics than I do) drove it around the block,
and he figured that the engine is running just fine. Nothing wrong there.
The problem, he surmised, is somewhere in the drive train. Either tranny or drive shaft or differential.
So, we parked, got under the car, and found that the drive shaft moves laterally very easily.
Turns out that the entire problem was the Carrier Bearing. I've never even heard of that thing before.
It holds the drive shaft, halfway between the tranny and the rear end.
The drive shaft was shaking / vibrating at a certain RPM / Speed.
Replaced the carrier bearing... problem solved. All is well.
Thanks very much for all of your input, people. We had a tricky one, here.
Junior Member
Joined: Jan 2025
Posts: 1
Transmission
Maybe try the transmission as a really good service as my magna I bought was doing the same thing and it wasn't the otir but the transmission even after I had it so called service done it was the same but went elsewhere and he told me the service on the transmission wasn't done just a new oil filter out on the transmission and I was lucky it didn't stuff my transmission,.anyways had a great thorough service done and it was back to driving like a dream, just a thought as mine felt like a rough road or breakdown of electrical but wasn't.
Hello, people,
On a 2000 Montero Sport, 3.5L, 2WD, with 204K miles,...
It started Missing about 2 months ago, and has gradually gotten worse.
Now, it Misses every few minutes, And... a few times a day, it misses
many times in rapid succession, to where it feels like I'm driving on
a rough road for a second or two. And, the Check-Engine-Light is Not on.
I've owned it for 2 years; I don't know when the last tuneup was done.
The mechanic hooked it up to his computer, said everything looks good.
He figured: "New Plugs and Wires should fix it".
$390 later, it runs just the same. No improvement.
The Mechanic now just wants to wait until the CEL comes on, so then
he'll know where the problem might be. I don't really want to wait.
Have you experts got any clues?
Maybe it's not even a Miss? But that's what it feels like.
Thanks very much for any advice.
Mark53
On a 2000 Montero Sport, 3.5L, 2WD, with 204K miles,...
It started Missing about 2 months ago, and has gradually gotten worse.
Now, it Misses every few minutes, And... a few times a day, it misses
many times in rapid succession, to where it feels like I'm driving on
a rough road for a second or two. And, the Check-Engine-Light is Not on.
I've owned it for 2 years; I don't know when the last tuneup was done.
The mechanic hooked it up to his computer, said everything looks good.
He figured: "New Plugs and Wires should fix it".
$390 later, it runs just the same. No improvement.
The Mechanic now just wants to wait until the CEL comes on, so then
he'll know where the problem might be. I don't really want to wait.
Have you experts got any clues?
Maybe it's not even a Miss? But that's what it feels like.
Thanks very much for any advice.
Mark53
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