Hey guys, long long time since ive been on here. my blazer just hit 225k and still running like a beast. i drive alot for a living and its been running fantastic.

I ran that seafoam crap through my system over the summer and ever since then ive had a problem starting the truck when cold, and also the idle is thrown off.

Along with that problem ive got a really smelly exhaust leak that comes through the vent and into the cab. are both of these problems related? do i have bad o2 sensors and do both need to be replaced? im just looking for a direction as to what needs repair.

thanks, shawn

 

Hi, the O2 sensor also reacts to the leak you have in the exhaust, I would fix that first and see what's happening!
Grz Hank.

 

If the exhaust leak is between the engine and the first O2 sensor (the one closest to the 'y' in the y-pipe), then yes, it could be throwing off the O2 sensor readings.

Have you scanned the computer for codes? If so, what were the codes?

 

I havent been able to read the codes. my truck is a OBD1.5 and therefore NOONE has a tool thatll read it. ive been to autozone/advanceauto. i guess i should try PepBoys?