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rpmdiag
rpmdiag, Tech and Instructor
Category: Nissan
Satisfied Customers: 6855
Experience:  Since 1975
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2001, Sorry mistake, 2011 Nissan Altima very bad hesitation

Customer Question

2001
JA: What is the model of your '01 Nissan?
Customer: Sorry mistake, 2011 Nissan Altima very bad hesitation or bog after closed loop tried disconnecting alt. replaced MAF, throttle body, also for fyi had trans. replaced , fuel press is 53 psi, 10 %ethanol idle learned 3 times Identifix is stumped scoped crank / cam sensor. comp sees gas pedal input but can watch throttle body plates open and close on waveform on scanner.
JA: Are you certain it's the fuel pressure sensor that's in need of attention? What about the fuel rail? Have you checked it yet?
Customer: no don't think it's fuel
JA: Are you fixing your Altima yourself? What have you tried so far?
Customer: did you read what I just typed ??
JA: Got it. Anything else you want the Nissan Mechanic to know before I set up your one-on-one?
Customer: no.... how much????
Submitted: 2 months ago.
Category: Nissan
Expert:  rpmdiag replied 2 months ago.

Hi, I'm Ron and I will be helping you today.
Stand by for a moment while I prepare your answer.

Expert:  rpmdiag replied 2 months ago.

The only and best way to get this resolved is by attaching a data recorder to see exactly what has changed from open to closed loop. Once it's been recorded, you just read it all back on your computer.

Most shops should have this tool and you can even get your own for about $50.00 on Amazon.

I use the OTC 3005 data logger.

This will find the problem for sure.

Thanks, Ron

Expert:  rpmdiag replied 2 months ago.

Thanks again and please remember to rate me 5 stars and keep this link in case you need me again later on.

Ron

Expert:  rpmdiag replied 2 months ago.

If you are satisfied with my answer, I would greatly appreciate a 5
star rating now and I will still assist you after you have rated me
too if another question pops up. I don’t get credit for helping you
until you rate me.
Thanks again, Ron