Mitsubishi Montero & Montero Sport This sport utility vehicle offers more size than the other Mitsubishi SUVs, but manages to keep a sporty look and comfortable feel, unlike many larger SUVs.

3.0 wont accelerate after warmed up

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Old Sep 14, 2023 | 12:39 PM
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LandauMech's Avatar
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Default 3.0 wont accelerate after warmed up

Hello everyone, new user/first post.
Recently bought a 89 Montero 3.0V6
When I got it the fuel tank was in the back and completely rusted, I've since removed all the rust and put a tank liner in it and hooked everything back up. Ran like ****e and was pouring smoke out of the exhaust. Replaced the air flow sensor and it stopped smoking. However now after the vehicle gets warmed up and to temp it wont accelerate, the rpms move real slow no matter how much I press the gas and struggles to get up to speed and shift until it's in higher gears. Barely wants to leave 15MPH.
I've replace
Sparklugs and wires
Air flow sensor
ECT
Thermostat
Oil pressure sensor
And getting ready to install another replacement o2 sensor
Any helps would be very appreciated.
Thanks in advance. Landau
 
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