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Chevrolet Tracker Questions

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I have a 03 Chevy Tracker 2.0L 4X4 AT It ran Perfect when I first got it -But Started bucking, Horribly like it was missing on 2 of 4 cylinders. MAF DTC So I cleaned MAF. Run perfect again for about 100 miles & Repeated the Bucking. DTC said Replaced the MAF, MAP, Knock, ECT, OX, sensors & Sparkplugs & it still has both MAF Low & High Input-DTC, ETC Low Input, Knock High input, & undefined DTC.
Unplug/Replug Wire harness under Dash on Drivers Side. MAF Low is now Gone, But, MAF High Input, ETC Low, & Knock Sensos High inputs Still Come Back. WTF Help
I have an Auto Boss V30 Elite & Monitor all sensors - MAF stays at 239.4 all the time and I can unplug it with no change but, when I remove MAF from in take Tube with it plugged in - 239.4 reduces slightly & engine Stops. Also, EGR is always at 0.0
All other Sensors Look like they are Functioning correctly. Would you get an ECM Defective DTC if it is bad,?.? Help Thanks
Took four floor bolts out. Last one hooked to hump in the center of car. Head of bolt under track.don't know how to get to it. Any suggestions?
Need suggestions why
car ran perfect -Started bucking like it was missing on 2 of 4 cylinders. MAF DTC So I cleaned MAF. Run perfect again for about 100 miles & Repeated the Bucking, Replaced the MAF, MAP, Knock, ECT, OX, sensors & Sparkplugs and 03 Tracker 2.0L 4X4 AT & it still has both MAF Low & High Input-DTC, ETC Low Input, Knock High input, & undefined DTC's WTF Help
Monitor all sensors & MAF stays at 239.4 and I can unplug it with no change but, when I remove MAF from in take Tube with it plugged in - 239.4 reduces slightly & engine Stops.
Also, EGR is always at 0.0 Thanks
It feels like the back passenger side is shaking but also feels like the clutch isn't engaging.
is it worth it? they say it runs good but I think to much mileage? What does everyone think?
Replaced alternator. Week later "Service Engine" light came on. Had garage run diagnostics - no problem showed. Only drove on short trips in city and light still on, but no still no problems ... Until I took a 200 mi trip and smelled something burning on my return trip. when I arrived home and turned car off, noticed dark smoke coming from under hood -- not sure where it came from (dark). Just wondering if anyone knows a reason.
Occurs everytime.
Tracker suddenly overheating, but only when driving.. never in idle. Replaced thermostat,alternator,water pump...still same. not sure if connected but a\c quit too at same time and battery showing small loses of power .. one rad hose piping hot, other cold...all fans seems ok, blows but no ac. No water in oil or vice versa.. im at the end of my budget for fixes so any info would be great..oh and only codethat came up was for engine overheating
Seems dead at times, other times radio plays and there is a clicking noise. Battery is new and has been tested. Has started afyer long jump, has started after messing with wires hanging on fuse box (under the hood by battery). After getting it started we can drive it 3-4 days and then we get in and it won't start. Took it to mech and he had no problem.
what else can it be?? the one guy says maybe the flywheel was put on wrong the other one iinsists it was put on right what could it possibly be?? any suggestions would be great
when we bought it the timing chain had to be replaced and it has been an awesome car but in the past few days it stated a knocking sound please tell me its not too serious
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