I just pulled vac lines off the intake and plugged them, with no change at all. And there isnt a vac line on the egr..i did unplug the egr though and also made little to no difference. The temp sensor thats under the intake is brand new..could it be the one on the side of the block??

 

It could be. But honestly I don't remember which sensor is which. >_>

One is a temp sender for the instrument cluster and one is the actual sensor. I had those two mixed up a couple years ago when I had to service my cooling system.

 

Took off and plugged vac lines on the intake and it made no difference at all. There isnt a vac line on the egr though..i did unplug it but it didnt seem to do much. Also the temp sensor under the inake is brand new. Could it be the one on the side of the block? I just unhooked the battery to maybe reset somthing and i havent since the new temp sensor so im crossing my fingers!

ooops! lol i thought the first one didnt load. sorry guys! Ill hafta figure out which is which, but thanks for the help!

The battery reset didnt do anything either. I need a code reader i think..its got me stumped

 

No, you dont need a code reader

How to look up Service Engine Soon codes without scan tool - S-10 Forum

 

Did the code test with key just turned to on and it has no stored codes. just code 12. Also checked it while running and got nothing..it initially flashes 3 times and then the check engine light is just on, no flashing. when i pulled the paper clip out the check engine light went of and stayed off...WTF. Thanks though pettyfog

 

The vacuum to the EGR is gated by the EGR solenoid which can be found by following that small line back

Also - unlike later models- you have two temp sensors.. one for gauge, one for PCM. Warm up till gauge registers, unplug the one on top and check gauge again.

 

I have an electronic egr..im gana try the temp sensor check tho and see what happens.

Its a vortec engine, not the throttle body style intake.

 

It's the exhaust gas end that counts



Here's how:
https://blazerforum.com/forum/articl...leaning-40424/

 

Ok...now it willl not get fully warm, or doest seem to at least. The gauge now goes to about 180 which is where it should be and stays there..drove it today for about 20 min while fully warm and it didnt change at all, ran like crap the whole time. Its never done this before, always got better after getting fully warm. To keep it at speed (20-70) i have to tap the pedal, its fine after just toutching the pedal but maybe 1 second later it misses and sputters so im constantly tapping the gas. But if i put it to the floor it goes just any blazer would. Also, a few times while excellerating the spedo would climb really rapidly..like from 30 to 40 the speedo would go to 70 or 80 but when i let off it goes to normal speed. Not sure if this is a seperate problem or not but strange. Im so lost. Still need to pull the egr off to see if maybe something got stuck in it, but it was replaced maybe 60 miles ago..

 

The temp sensor on the side of the engine block is only for the Gauge/Lite on the dash. There should be a vacumn line to the EGR valve from the EGR solonoid.