97' blazer. shaking bad at idle. temp normal. oil good. no abnormal smoke. will do 65 mph. parts house did a scan and it could be egr, cam sensor, or oxy sensor. according to them probably only one is bad and setting off the others. on my mothers 93' i had simular troubles cleaned the egr and she was a go. the vehicle belongs to son in law and they dont have alot of cash so i dont just want to throw parts at it. cleaned the egr with brake fluid and no go. your thoughts? thx in advance!

what a first post huh?

 

Did they tell you what the codes were? As in a P0101 etc. That would help in figuring it out. In the meantime I'd look for vacuum leaks.

 

ive got the report somewhere. undoubtedly the wife "organized". sprayed starter fluid around the mani while at idle and no change, so dont know about vac leak. thx tho

 

Just not the manifold, the lines to & from & you have lines possibly in the fenderwell or the ball under the hood & inside the cab.

 

Sounds like a vac leak,or i was going to say egr but thats already looked at.

 

i will def check all those then. think the egr could malfunction even after being cleanedd?

 

Possibly & I've heard a new one isn't much money, but I'd check the free things like vacuum lines 1st.