Nissan Repair Questions? Ask a Mechanic for Answers ASAP
As it gets worse idle is somewhat affected.
At first idle is ok
No cant get car over 3000 rpms
what do you need me to check or do.
I have someone that has a Mentor tool if that is what you mean
I have tried disconnecting the mass air flow.
It did not help.
I will try shortly to get the info on the fuel trim info.
My only problem with distrubutor or mass air flow is that belt was done yesterday.
No prior problems. was running great.
That is why I wondered if belt could be off a notch or so and causing problem.
No wiring was disconnected. Yet did fold harness back slightly to access other components.
Even wonder if could be problem with harness.
Thats why I am trying to determine if I need to pull back down and reinspect. Even though had double checked when installing and had someone else also ck over me and it seemed good then as far as the timing marks
I will check fuel trim and get back with you shortly
not sure if my last message went thru.
so this may be a duplicate
stft bank 1 reading negitive .08 to 0.0%
stft bank 1 sensor 2 reading 99.2 %
stft bank 2 sensor 1 reading 4.7%
stft bank 2 sensor 2 reading 99.2%
short term ft bank 1 flucuates 0.0 to 0.8 %
short term ft bank 2 flucuates 5.5 to 6.2 %
Not at car right now.
I did ck the air mass reading before and made a note yet dont have it with me now.
I do want to say it was 4 or slightly over 4 g.m/s at idle. Did not check it off idle.
The other items I am not fimilar with yet will ck and see. However it will be tommorrow before I can check. Will get bck with you asap
Did find picture I saved showed air mass reading at 4.0 g/s
man absolute press 9 iHg
o2 sensor 1/2 volts 0.00 v
o2 sensor 2/1 volts 0.14 v
o2 sensor 2/2 volts 0.08 v
Then the rest was the other reading earlier about short term fuel trim.
I will look tommorow for the other specs on the chart.
If I have a picture can and or how can I attatch it to this?
As the evening went on yesterday the truck began to run rougher than before.
Got to where you couldnt drive it at all.
A/c even quit blowing cold.
Let car set overnight
\A/C is fine today
Drove car approx 4 miles before noticing problem
Drove total of 8 miles before problem got bad. Yet still not as bad yet as yesterday evening but I am confident it will get worse again as the day goes on.
The air mass reading is the only reading I can get from the scanner.
I did test it at 2500 rpms it read 22.3.
You asked yesterday if the car would get over 3000 rpms.
Today when first driving it did.
Then as problem begin to act up it was more under load above 3000 rpms.
As the problem gets worse then, no the car will not get over 3000 rpms
When doing original repair nothing was disconnected on the wiring harness. However did remove metal pipe that runs from valve cover to valve cover. It is located somewhat under the distributor.
Then lifted harness back to access front of engine.
Thinking maybe we had bumped the connector to the distributor and it could be loose.
So I pulled the connector to inspect and reinstalled (not seeing any problem). and made no difference after doing so.
Was going to ohmn out the coil in the distributor yet cant get disconnected to test. How does that connector work and I am doing any good or wasting time in that direction.
Waiting on any new thoughts or info.
Ok I had about come to the same conclusion of air mass or coil. Even though I have a hard time understanding why instantly after replacing tbelt.
I will order the air mass and repl. Part wont be in untill tomorrow. But we will give it a try.
Only question is though I would have to ass/u/me that when we disconnected the airmass yesterday it would have went to base setting and made some minor improvements but it didnt.
what do you think?
I will let you know how it turns out
I am going thru a battery reset now.
Thanks for the tip. I will do it again if replacing the air mass meter.
The engine at idle doesnt always run bad or only for a split second then is ok.
More under load is the worse.
However I have done a smoke test and no leaks detected.
I will try later with engine running and carb cleaner.
Air mass meter is on order and will arrive tomorrow around 10:30 am Central Time
Been out of pocket most of the day.
No luck with airmass meter.
However on a hunch and had also ordered distributor with ignition coil build in.
Thats what it felt like was a coil breaking down after heating up.
But just couldnt believe it happened instantly after replacing timing belt.
Just couldnt make a mental connection between the two.
Again dont know if distributor was bumped when removing metal pipe under it that ran from valve cover to valve cover.
But I guess I have seen stranger things happen.
Thanks for your help and guidance.
I have never used this system before.
I have been hitting the "Reply to Expert" button evertime I was finished.
So I will do the same this time to be sure you get my responce.
However for you to get your pay for your time do I need to respond back and then select the "Accept Answer" button?