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JOHN aka Eauto
JOHN aka Eauto, The Car Guy
Category: Nissan
Satisfied Customers: 16049
Experience:  ase tech over 15 years in the field uaw union member
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Im working 2000 Nissan frontier 2.4L, 2WD, automatic approx

Customer Question

Im working 2000 Nissan frontier 2.4L, 2WD, automatic approx 125k miles. The owner says it loses power/wont increase speed randomly at arounf 45/50 MPH. As the vehicle had never been serviced other than oil changes and no codes set I performed major tune up (plugs, cap,rotor, fuel filter, air n oil to spec, check base timeing etc). It appeared to be solved, however it returned with same issue. Checked with fuel press gauge and found key ON psi to pretty good at around 43 psi but engine running to only be in the 20,s) We ended up replacing the pump and FPR both while at it, did see pump issues/factory recalls on these gen Nissans.
As you can guess the problem is still there. No codes, trans fluid looks clean n full, engine runs like champ. conducted cylinder balance test and passed, all grounds and fuses etc look good. RPM dont change dureing vac leak testing at throttle body or intake maniflod. Im kind of suspecting its an actual tranny shift issue. I couldnt get it to stall/lose power for me during test drive. I didnt adjust the Throttle cable for trans or do a trans service as its due as well. maybe a plugged Cat converter?
Anyway was hoping this is a Nissan thing and asking a Nissan tech may solve/save time?
Submitted: 1 year ago.
Category: Nissan
Expert:  JOHN aka Eauto replied 1 year ago.

have you checked the converter for melt down?

Customer: replied 1 year ago.
No im not sure how to do a melt down test, visually looks fine without pulling it of course. I dont have tail pipe emission or flow capabilities. A cat does make sense tho what do you suggest other than pulling it etc, or how do I check for meltdown?
Customer: replied 1 year ago.
very cool, I will attempt this and get back to you John. I really appreciate your help and suggestion on this dang truck. Have agood day and will get back to you when I have anything. Thanks again, Matt
Expert:  JOHN aka Eauto replied 1 year ago.

great hope you can rate me 5 star