Question about 2008 Nissan Titan

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My 2008 Nissan Titan with 75000 miles will not accelerate over 2500 RPM's...

When I floor the pedal it will not go over 40MPH.. I noticed a few days ago it was Idling high and kind of knocking... Didnt thinkg anything of it at the time.. But this morning I went to get on the freeway it wouldn't shift the RPM's stayed under 2500... I pulled to the side of the road put it in park and reved the engine and it seemed to work....No lights appered on the Dash board... Have not hooked it up to a diagnostic reader yet...Any ideas on the problem?? Coil pack? Spark plugs? Throttle sensor? Please help :)

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1 Answer

Have to check for codes first

All the items you mentioned spark plugs & such,
only you know when they were done last, if you have
a log book or good memory,not likely they would
cause the 40 mph thing

Not to go past 40 mph or not shift, doesn't sound good to me

You said it was knocking & you continue to use it !

Think I would have my check book handy & be ready to
get very upset.

Posted on Apr 03, 2014

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if you notice it when it is wet out then i would do a tune -up but if not i would check the fuel injectors because they are a very very common problem with these years of cars. i do them all the time.

please give me a repair history and i will try to help.

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