On my 94Q I occasionally notice less power at midrange rpms under heavy throttle. Everything was fine, until I ran out of gas one day (stupid mistake). After that I had rough idling,...the shop cleaned vaccum lines and adjusted the idle and everything seemed OK. Then some time later the car started stalling at idle. Took it into the shop and they found a bad injector (and cracked fan blade too). Replaced that and everthing was fine. Now I have the occasional lower power output when under heavy throttle. This engine really ran strong when I got it, so I'm starting to wonder if it is giving up. It only has a 107K on it.
Any ideas?
Thanks in advance!
Q45 midrange rpm power drop
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maxnix
- Posts: 22627
- Joined: Mon Jul 22, 2002 8:11 pm
- Car: 1995 Infiniti Q45
1995 Infiniti Q45t
2000 Infiniti Q45
Might do a search on fuel pump and fuel filters. Cleaning the vacuum lines is usually not required, but cleaning/replacing the fuel lines and the gas tank is when the fuel pump is replaced.
Running fuel level below ¼ tank is a definite no no if you value fuel pump and fuel pump controller longevity.
Running fuel level below ¼ tank is a definite no no if you value fuel pump and fuel pump controller longevity.
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SeattleQ45
- Posts: 69
- Joined: Sat Mar 06, 2004 6:43 pm
- Car: 94 Q45
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Q451990
- Moderator
- Posts: 11033
- Joined: Tue Jul 23, 2002 8:21 am
- Car: 1990 Q45 - 118K, 2022 Toyota 4 Runner, 2004 Frontier M/T - 108K, 2012 Xterra (Mom's), 2023 Rogue (Inlaws)
- Location: Columbia, SC
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I'd get an injector flush and replace the filter again just to see... you may have gotten some garbage on the fine screens that protect the injector from any debris in the rail. The pressurized flush should take care of it. Just be sure to do a "drive the doors" off run for a few minutes when you get it back to make sure the garbage that you removed doesn't reattach itself to the piston crowns and valvetrain.
Heath
Heath