Thinking its a TPS Problem

[amo1dun]

Stupid 89 Pathfinder 4x4 98K miles Automatic

 

Hesitates No power in 1st noticeably sometimes(like im pulling a damn tree), needle on tach gauge fluctuates( wont hold steady speed you can see it backing off on the gauge and when it shifts from 1st to 2nd sometimes slingshots below 1000rpm sputters bad and wants to cut out but never stalls) Usually happens after im stopped at a light, then takeoff again or when taking turns at slow speeds then accelerating again.

 

I got a flashing power light yesterday when I turned the key(Not the normal flash, the one that says my @!*% is being stupid) Did the A/T test and got the 3rd judgement flicker on the power light...which is TPS shorted or disconnected. Checked ECU also and shows 55 everything ok. Power light flashes normally now and has since then.

 

Cat is good

Tranny Fluid looks good newer tranny with cooler(f'n better be)

Plugs Wires cap rotor fuel filter at last oil change

MAF is clean

 

 

Can someone help with some steps to test the tps and adjust it if necessary?

 

THanks as always

[nige]

check your O2 sensor before the TPS. The easiest way is to just unplug it under the hood and see if driveability improves. sometimes they don't trigger a trouble code in the ECU when they go bad.

[amo1dun]

check your O2 sensor before the TPS. The easiest way is to just unplug it under the hood and see if driveability improves. sometimes they don't trigger a trouble code in the ECU when they go bad.

 

Tried this already...and its actually screwed in the front pipe on my 89.

[Kingman]

Yes, that's where it mounts to the exhaust. It plugs in to a harness on the passenger side of the engine bay. Good thing is, TBI O2 sensors don't do that much drive ability-wise.

 

Check to make sure the TPS sensor plug didn't come undone, or wires didn't break. If it's good, pull the plug off and make sure there's no corrosion on/in the contacts.

 

Does it smell rich, or use more fuel than normal? Also, check damn well to make sure there's no arching of the coil wire... it will mess with you for days and will make you feel like an idiot for dinking around with everything else when a piece of electrical tape can fix the problem.

 

This is what mine did with a slightly arching coil wire, which was brand new by the way.

http://www.youtube.c...h?v=VUpwo0eti4I

Edited July 8, 2010 by Kingman

[amo1dun]

Yes, that's where it mounts to the exhaust. It plugs in to a harness on the passenger side of the engine bay. Good thing is, TBI O2 sensors don't do that much drive ability-wise.

 

Check to make sure the TPS sensor plug didn't come undone, or wires didn't break. If it's good, pull the plug off and make sure there's no corrosion on/in the contacts.

 

Does it smell rich, or use more fuel than normal? Also, check damn well to make sure there's no arching of the coil wire... it will mess with you for days and will make you feel like an idiot for dinking around with everything else when a piece of electrical tape can fix the problem.

 

This is what mine did with a slightly arching coil wire, which was brand new by the way.

http://www.youtube.c...h?v=VUpwo0eti4I

Dude thats too funny..I watched your video on the engine cutting out like 2 months ago. Anyways, Im not really a believer in false trans codes, If it was throwing the power light( and it has 3 times in the last 2 months) on startup for the TPS, then it has to be reading a discrepancy somewhere in the circuit But still cant get a 43 out of the ecu I just dont want to start pulling connectors. cant the TPS throw Idle Engine Speed and Ignition Timing off if you dont test it accordingly, including unplugging the IAC valve and following certain steps on testing and adjusting?