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97 altima Idle and hesitation problem solved!
Here is the story;
I bought 1 97 altima with 290000km 2 month ago.
-Idle was sometime bad, dropping to almost 200 rpm and even killing the engine sometime.
-When driving at slow speed, let's say in first or second gear, the car sometime hesitate. It hapen between 1200 and 2500rpm but only when a was going slow( I mean not full throttle) if a push a little bit more it stop.
- After a few weeks, I realise that if I hit the gaz slowly (when the car is stop) and bring it to about 1100 rpm it always hesitate.
So since the car was not so well maintenance, I did a Full tune-up.
(spark plugs, ignition wires, distributor cap, rotor, injector cleaner.)
Problem still there.
The car had a "ricing" air filtre witch I remove and the problem was still there.
After reading many tips in this forum , I even try a MAP that I had in stock but still the same.
I've scan the ecu and the only "pending or history" code that was on was :
After all those Tune up the check engine light finally lid up. (I was happy cause It could help to diagnostic)
The code was TPS .
I had already roughtly clean the throttle body (he was realllllllly dirty) , the car ran a little bit better for 2 days but that it.
So since the TPS code was on , I decide to remove the entire throttle body to clean it.
That was the problem!! I only had to remove it from the intake and clean it with intake-carburator cleaner and the car run great since then (2-weeks about 700km)
So here a advice to everyone who has idle-hesitation problem , first check the throttle body , it's very simple, just remove the air duct and take a look !
Hope I could help someone!
(I did not want to write about it before since I'm a mecanic and I HAD to find the prolem first!)