Vacuum leak?

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May 3, 2019 | 11:47 AM

seCen

Thread Starter

Racer

Joined: Feb 2014

Posts: 258

Likes: 17

Vacuum leak?

So my only mods is a supercharger and header. Car was running fine before I sprayed some seafoam into the throttlebody. Now the car is not running correctly. The fuel trim is out of wack. It idles rough. Sometimes the afr would drop to low 10.xx and the rpm would hoover around 500 when im in neutral after coming to a stop then goes back up to 13.xx-14.xx afr after like 5-10 seconds.

Do you think the seafoam fouled any sensors? Or is there a vacuum leak somewhere? I retighten all the clamps. I ordered a new evap canister vent, maf, and a pcv valve just to see if that would fix the issue.

May 3, 2019 | 02:28 PM

a/c man

Le Mans Master

Joined: Jan 2009

Posts: 7,767

Likes: 19

From: East Texas

Oil on sensors would be my guess they make a throttle body cleaner

May 3, 2019 | 05:05 PM

seCen

Thread Starter

Racer

Joined: Feb 2014

Posts: 258

Likes: 17

Going to take off one of the o2 sensors tonight to check if its covered in fluids.

May 5, 2019 | 09:50 PM

GeorgeR_Zed06

Burning Brakes

Joined: Aug 2009

Posts: 770

Likes: 164

From: Southeastern NM

swap out your spark plugs...

May 6, 2019 | 07:05 PM

seCen

Thread Starter

Racer

Joined: Feb 2014

Posts: 258

Likes: 17

Quote:

Originally Posted by GeorgeR_Zed06

swap out your spark plugs...

I took them all out and cleaned them. Same problem still persist. I bought new maf, evap canister, and pcv valve and none of them fixed the problem. My only idea left is the o2 sensors is fouled. Have time tonight to check them out.