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Truck loses power uphill. Must downshift to make it up hills

Tiny
DEE1994
  • MEMBER
  • 1995 NISSAN HARDBODY
  • 182,224 MILES
I push gas pedal to floor and actually slow down on inclines. I have done a basic tune up spark plugs, wires, distributor and rotor, air and fuel filter s. I need all possible solutions. Can't seem to figure it out. It mostly happens in higher gears unless its a real steep incline. Does fine downhill. Idles pretty rough and I can hear the timing chain rattle when I crank it.
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Sunday, June 16th, 2013 AT 10:28 PM

11 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Scan for codes and checkfuel pressure first. Ifyou can hear the chain rattling you beet fix it otherwise you will bend valves on this vehicle
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Monday, June 17th, 2013 AT 5:21 AM
Tiny
DEE1994
  • MEMBER
  • 6 POSTS
Got code and they are 23 and 45. Chain does rattle when I crank it
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Wednesday, June 26th, 2013 AT 3:42 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Then check tchain for wear or slippage I can't get to codes as i'm on vacation check back on monday thanks
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Friday, June 28th, 2013 AT 6:15 AM
Tiny
DEE1994
  • MEMBER
  • 6 POSTS
I'm am looking to get it fix but now the truck randomly won't start sometimes I have to keep trying to get it to start. It fires right up most the time and other times it won't. Not the battery cause lights come on. By the way codes are injector leak and idle switch
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Monday, July 1st, 2013 AT 5:24 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
I can't find a code 23 what engine is in this a 3.0L? Is this like a pickup or a pathfinder? Code 45 diagnostic is shown in pic. I'm sending two different things to check.
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Monday, July 1st, 2013 AT 6:06 PM
Tiny
DEE1994
  • MEMBER
  • 6 POSTS
Its the ka24e 2.4liter. Its a 95 pickup. Recently when I start it sometimes it doesn't do anything then other times it fires right up.
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-1
Monday, July 1st, 2013 AT 8:08 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Ok you should have 33 psi fuel pressure at the rail wih engine idling. If vacuum is disconnected it will be 43 psi. Your truck still doesn't show a code 23 so i'm taking it that it's a code 21 but check for a vacuum leak with choke spray, spray around intake for leaks. Also take intake vacuum reading at idle if 15" or less suspect a clogged converter.
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Tuesday, July 2nd, 2013 AT 5:17 AM
Tiny
DEE1994
  • MEMBER
  • 6 POSTS
Am gonna work on getting a fuel pressure gauge. Will let u know. But will this fix the starting problem
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Tuesday, July 2nd, 2013 AT 2:06 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
If you aren't getting the correct pressure you won't start the vehicle
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Tuesday, July 2nd, 2013 AT 2:19 PM
Tiny
DEE1994
  • MEMBER
  • 6 POSTS
The problem now is the truck doenst want to start up. All the lights come on but it doesn't even try to crank. Then I give it a second and it fires right up
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Friday, July 5th, 2013 AT 11:47 AM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Check battery for condition then check cables like the ground to make sure it's not dirty/corroded. Then have starter checked
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Friday, July 5th, 2013 AT 1:06 PM

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