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I have a 95 Chevy blazer with a very weird problem.It has an erratic idle.PO122 TPS code.This is when it all started,I had to drop trans pan and replace the 2 shift solenoids,and after I was done with that I gutted the converter(rattling)and ever since TPS reading has been fluctuating terribly with a crazy up and down idle.What is really weird is when U have it is idling crazy,u can shut ignition off,then restart and will idle fine for about 10-15 seconds then back to crazy idling again.Only thing I can think of is the gutted converter,throwing off downstream HO2S(but not sure,non mass-air system)Any help with this strange problem would be greatly appreciated.

Submitted: 419 days and 9 hours ago.

Category: Chevy

Value: $15

Status: AWAITING CUSTOMER ACTION

1995 Chevrolet BLAZER 4.3W

Already Tried:
REPLACED TPS AND ECM,CHECKED ALL GROUNDS,5 VOLT REFERENCE ETC

Answer

Hello, and thank you for choosing Just Answer!

You might want to check wiring and connectors, though.. This is TPS Low voltage code, and might even be a malfunction inside the computer. The best way I know to help you is to give the diagnostic flowchart specific to your truck for the code. I have uploaded it for you in PDF form, and you can access it right here.
If it were me, I would start with 'wire tugging' test, though.

Accepts:
Expert:	ase_master327
Pos. Feedback:	98.1 %
Answered:	9/30/2008

Shop Owner

+15 years experience with Chevrolet. Bumper to bumper diagnosis & repair.

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1995 Chevrolet BLAZER 4.3W Already Tried: REPLACED TPS AND ECM,CHECKED ALL GROUNDS,5 VOLT REFERENCE ETC

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1995 Chevrolet BLAZER 4.3W

Already Tried:
REPLACED TPS AND ECM,CHECKED ALL GROUNDS,5 VOLT REFERENCE ETC