what is this
Thread Starter
Heel & Toe
Joined: Jun 2010
Posts: 19
Likes: 0
From: Albany Georgia
what is this
Sorry for my ignorance, but what is this?( the part behind the accumulator). It is blowing air out the tube at the top. I also have code 32, which is the egr from my understanding. I removed the hose and checked the vacuum on it and it bleeds off. I will be replacing the egr. Will this cause the part I dont know what is to blow air out the tube? click the link below to see the picture (1991 L98 engine)
thanks
thanks
Safety Car
Joined: Jan 2004
Posts: 3,759
Likes: 8
That is the solenoid for the smog pump.
I believe that line that is missing goes to a check valve that then goes to the cat.
Code 32 could be other things like the EGR switch or EGR solenoid. But if you can't pull a vacuum on the EGR, or you can't open it up with a vacuum pump. Then you need to replace it. I recommend getting an AC Delco EGR from autopartstomorrow. You want to get a negative back pressure EGR. Most of the aftermarket sell positive EGR's for some reason.
I believe that line that is missing goes to a check valve that then goes to the cat.
Code 32 could be other things like the EGR switch or EGR solenoid. But if you can't pull a vacuum on the EGR, or you can't open it up with a vacuum pump. Then you need to replace it. I recommend getting an AC Delco EGR from autopartstomorrow. You want to get a negative back pressure EGR. Most of the aftermarket sell positive EGR's for some reason.
Team Owner
Joined: Jan 2003
Posts: 20,324
Likes: 250
From: Summerland B.C. Canada
Not familiar with the 91 A.I.R. system and it's been a long time since I had that crap on my car, but it could be the port that goes to a silencer. When the ECM doesn't call for air injection, the solenoid diverts the pumped air to a silencer (muffler).
Thread Starter
Heel & Toe
Joined: Jun 2010
Posts: 19
Likes: 0
From: Albany Georgia
thanks. didnt know that there was different pressure operated egr. I checked mine by disconnecting the vacuum hose from the egr switch and connected up my vacuum pump. then pumped to 15 and it would bleed down very slowly. I figured the egr was bad. Is there a way to check the switch and solenoid ?
Safety Car
Joined: Jan 2004
Posts: 3,759
Likes: 8
thanks. didnt know that there was different pressure operated egr. I checked mine by disconnecting the vacuum hose from the egr switch and connected up my vacuum pump. then pumped to 15 and it would bleed down very slowly. I figured the egr was bad. Is there a way to check the switch and solenoid ?
I believe the EGR should hold vacuum for around 20 seconds. On mine, I'd pump and pump, but the needle would fall straight to zero.
Safety Car
Joined: Jan 2004
Posts: 3,759
Likes: 8
On my 89, that hose on the top goes to the silencer. The missing hose goes to a check valve that then goes to the cat.
