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Altima's rpms goes up and down after car warms up. I need help please!!! Forums > > Altima's rpms goes up and down after car warms up. I need help please!!! Altima's rpms goes up and down after car warms up. I need help please!!!
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  #1  
Old 01-08-2021, 11:41 AM
TLMFL TLMFL is offline
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1998 Altima SE-R
2000 Frontier King Cab
1998 Nissan Altima
 
Join Date: Dec 2020
Location: Tampa, Fl.
Posts: 3
Default Altima's rpms goes up and down after car warms up. I need help please!!!

Hello all!

Iím new to this site and I feel like Iím going crazy working on my husbands Altima.

It's a 1998 Nissan Altima 2.4L that the engine idles fine cold but after it warms up
the rpms start going up and down by itself. If I put the car in drive and ease on the gas it stalls.
If I put the car in drive and take my foot off the brake, the car will pull itself.
I checked/tested all the fuses under the hood and under the dash on the driver side.
I removed the radiator and cap, replaced them with new ones.
A friend flushed the engine for me, refilled and burped it.
I replaced the Thermostat, after the engine flush before It was refilled.
I checked and replaced all the holes and clamps, all are tight.
I replaced the Distributor cap, rotor, spark plugs and wires.
I replaced the Fuel filter on the fire wall and checked the pressure on the rail.
I cleaned the throttle body 3 or 4 times now.
I replaced the EGR sensor 3 months ago.
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  #2  
Old 01-25-2021, 09:28 PM
HenryDL HenryDL is offline
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2009 Pathfinder
 
Join Date: Sep 2020
Posts: 16
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Welcome! You may want to post on the tech section so more people could notice it.
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  #3  
Old 04-14-2021, 06:49 AM
TLMFL TLMFL is offline
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1998 Altima SE-R
2000 Frontier King Cab
1998 Nissan Altima
 
Join Date: Dec 2020
Location: Tampa, Fl.
Posts: 3
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Thank you. I had to deal with a family medical thing, first I've been able to get back to this. My son has looked up a few things for me to check on but he doesn't do the hands on work. Thanks again
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  #4  
Old 04-20-2021, 06:30 PM
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mpe235 mpe235 is offline
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2015 Rogue
 
Join Date: Jun 2006
Location: New York
Posts: 5,580
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Check for an air leak at the intake manifold gasket. Get a can of carb and choke cleaner and spray around the intake manifold with the engine running. When you hit the spot that is leaking you should notice a change in engine rpm.
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  #5  
Old 04-21-2021, 05:18 AM
TLMFL TLMFL is offline
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1998 Altima SE-R
2000 Frontier King Cab
1998 Nissan Altima
 
Join Date: Dec 2020
Location: Tampa, Fl.
Posts: 3
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Thanks mpe 235, I think that problem is fixed but won't know until I can get the car running. I will try to get this post over on the tech form but need to run family member back to doctor. Thanks again for your help.
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